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#26 2018-11-25 07:30:12

bugsmanagement
Member
Registered: 2017-04-21
Posts: 201

Re: Can't connect via ethernet after update

You should have remove the ones that don't work, you'll end up with intermittent DNS lookup failures otherwise.

nameserver 1.1.1.1
nameserver 1.0.0.1
nameserver 8.8.8.8

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#27 2018-11-25 07:40:39

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

bugsmanagement wrote:

You should have remove the ones that don't work, you'll end up with intermittent DNS lookup failures otherwise.

nameserver 1.1.1.1
nameserver 1.0.0.1
nameserver 8.8.8.8

Removed them and added those, and still no luck hmm

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#28 2018-11-25 07:45:45

bugsmanagement
Member
Registered: 2017-04-21
Posts: 201

Re: Can't connect via ethernet after update

I did what I could to help, but there should be plenty of information here for the next person to sift through to help figure out what might be happening here. sad

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#29 2018-11-25 07:46:30

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

bugsmanagement wrote:

I did what I could to help, but there should be plenty of information here for the next person to sift through to help figure out what might be happening here. sad

Yep, thanks again for all your help and patience! Appreciate it smile

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#30 2018-11-25 09:29:56

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 78,713

Re: Can't connect via ethernet after update

Forget about the DNS resolution, as long as you cannot ping 8.8.8.8 that's irrelevant.
The ip a output in comment #12 shows that the eno1 interface is not up, thus has no IP and ultimately you've also no route.
What's the "ip a" and "ip r" addresses after you brought that interface up and ensured dhcpd running on it? (Check after EACH step)

Nov 24 22:51:18 archPC dhcpcd[1080]: eno1: offered 172.19.93.61 from 130.132.1.56
Nov 24 22:51:18 archPC dhcpcd[1080]: eno1: ignoring offer of 172.19.93.68 from 130.>

There might be a rogue dhcp server on the nework, see whether you get full lines with "systemctl --no-pager"
Also see https://bbs.archlinux.org/viewtopic.php … 0#p1433680

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#31 2018-11-25 09:46:29

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

seth wrote:

Forget about the DNS resolution, as long as you cannot ping 8.8.8.8 that's irrelevant.
The ip a output in comment #12 shows that the eno1 interface is not up, thus has no IP and ultimately you've also no route.
What's the "ip a" and "ip r" addresses after you brought that interface up and ensured dhcpd running on it? (Check after EACH step)

Nov 24 22:51:18 archPC dhcpcd[1080]: eno1: offered 172.19.93.61 from 130.132.1.56
Nov 24 22:51:18 archPC dhcpcd[1080]: eno1: ignoring offer of 172.19.93.68 from 130.>

There might be a rogue dhcp server on the nework, see whether you get full lines with "systemctl --no-pager"
Also see https://bbs.archlinux.org/viewtopic.php … 0#p1433680

Oops, sorry about that! My bad. Here are the results:

[david@archPC ~]$ sudo systemctl start dhcpcd@eno1.service
[sudo] password for david:
[david@archPC ~]$ sudo systemctl status dhcpcd@eno1.service
● dhcpcd@eno1.service - dhcpcd on eno1
   Loaded: loaded (/usr/lib/systemd/system/dhcpcd@.service; disabled; vendor preset>
   Active: active (running) since Sun 2018-11-25 00:00:03 EST; 10s ago
  Process: 1063 ExecStart=/usr/bin/dhcpcd -q -w eno1 (code=exited, status=0/SUCCESS)
 Main PID: 1275 (dhcpcd)
    Tasks: 1 (limit: 4915)
   Memory: 4.0M
   CGroup: /system.slice/system-dhcpcd.slice/dhcpcd@eno1.service
           └─1275 /usr/bin/dhcpcd -q -w eno1

Nov 25 00:00:01 archPC dhcpcd[1063]: eno1: IAID 50:d5:1c:af
Nov 25 00:00:01 archPC dhcpcd[1063]: eno1: soliciting a DHCP lease
Nov 25 00:00:01 archPC dhcpcd[1063]: eno1: soliciting an IPv6 router
Nov 25 00:00:02 archPC dhcpcd[1063]: eno1: offered 172.19.93.61 from 130.132.1.56
Nov 25 00:00:02 archPC dhcpcd[1063]: eno1: leased 172.19.93.61 for 120 seconds
Nov 25 00:00:02 archPC dhcpcd[1063]: eno1: adding route to 172.19.93.0/24
Nov 25 00:00:02 archPC dhcpcd[1063]: eno1: adding default route via 172.19.93.1
Nov 25 00:00:03 archPC dhcpcd[1063]: forked to background, child pid 1275

[david@archPC ~]$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 54:a0:50:d5:1c:af brd ff:ff:ff:ff:ff:ff
    inet 172.19.93.61/24 brd 172.19.93.255 scope global noprefixroute eno1
       valid_lft forever preferred_lft forever
    inet6 fe80::2554:de25:e44f:9407/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: wlp6s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether b2:98:7b:de:6e:a2 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::b098:7bff:fede:6ea2/64 scope link 
       valid_lft forever preferred_lft forever
[david@archPC ~]$ sudo systemctl status dhcpcd@eno1.service
● dhcpcd@eno1.service - dhcpcd on eno1
   Loaded: loaded (/usr/lib/systemd/system/dhcpcd@.service; disabled; vendor preset>
   Active: active (running) since Sun 2018-11-25 00:00:03 EST; 21s ago
  Process: 1063 ExecStart=/usr/bin/dhcpcd -q -w eno1 (code=exited, status=0/SUCCESS)
 Main PID: 1275 (dhcpcd)
    Tasks: 1 (limit: 4915)
   Memory: 4.1M
   CGroup: /system.slice/system-dhcpcd.slice/dhcpcd@eno1.service
           └─1275 /usr/bin/dhcpcd -q -w eno1

Nov 25 00:00:01 archPC dhcpcd[1063]: eno1: IAID 50:d5:1c:af
Nov 25 00:00:01 archPC dhcpcd[1063]: eno1: soliciting a DHCP lease
Nov 25 00:00:01 archPC dhcpcd[1063]: eno1: soliciting an IPv6 router
Nov 25 00:00:02 archPC dhcpcd[1063]: eno1: offered 172.19.93.61 from 130.132.1.56
Nov 25 00:00:02 archPC dhcpcd[1063]: eno1: leased 172.19.93.61 for 120 seconds
Nov 25 00:00:02 archPC dhcpcd[1063]: eno1: adding route to 172.19.93.0/24
Nov 25 00:00:02 archPC dhcpcd[1063]: eno1: adding default route via 172.19.93.1
Nov 25 00:00:03 archPC dhcpcd[1063]: forked to background, child pid 1275

[david@archPC ~]$ ip r
default via 172.19.93.1 dev eno1 proto dhcp src 172.19.93.61 metric 202 
172.19.93.0/24 dev eno1 proto dhcp scope link src 172.19.93.61 metric 202 
[david@archPC ~]$ systemctl --no-pager
  UNIT                            LOAD   ACTIVE SUB       DESCRIPTION              
  proc-sys-fs-binfmt_misc.automount loaded active waiting   Arbitrary Executable File
  sys-devices-pci0000:00-0000:00:02.0-0000:02:00.1-sound-card1.device loaded active plugged   GM200 High Definition Aud
  sys-devices-pci0000:00-0000:00:03.0-0000:01:00.1-sound-card2.device loaded active plugged   GM200 High Definition Aud
  sys-devices-pci0000:00-0000:00:14.0-usb2-2\x2d6-2\x2d6:1.0-bluetooth-hci0.device loaded active plugged   /sys/devices/pci0000:00/0
  sys-devices-pci0000:00-0000:00:14.0-usb3-3\x2d2-3\x2d2:1.0-host6-target6:0:0-6:0:0:0-block-sdc-sdc1.device loaded active plugged   Extreme EFI\x20System    
  sys-devices-pci0000:00-0000:00:14.0-usb3-3\x2d2-3\x2d2:1.0-host6-target6:0:0-6:0:0:0-block-sdc-sdc2.device loaded active plugged   Extreme Linux\x20swap    
  sys-devices-pci0000:00-0000:00:14.0-usb3-3\x2d2-3\x2d2:1.0-host6-target6:0:0-6:0:0:0-block-sdc-sdc3.device loaded active plugged   Extreme Linux\x20filesyst
  sys-devices-pci0000:00-0000:00:14.0-usb3-3\x2d2-3\x2d2:1.0-host6-target6:0:0-6:0:0:0-block-sdc.device loaded active plugged   Extreme                  
  sys-devices-pci0000:00-0000:00:19.0-net-eno1.device loaded active plugged   Ethernet Connection (2) I
  sys-devices-pci0000:00-0000:00:1b.0-sound-card0.device loaded active plugged   C610/X99 series chipset H
  sys-devices-pci0000:00-0000:00:1c.3-0000:06:00.0-net-wlp6s0.device loaded active plugged   BCM4360 802.11ac Wireless
  sys-devices-pci0000:00-0000:00:1c.4-0000:07:00.0-0000:08:04.0-sound-card3.device loaded active plugged   CMI8788 [Oxygen HD Audio]
  sys-devices-pci0000:00-0000:00:1f.2-ata1-host0-target0:0:0-0:0:0:0-block-sda.device loaded active plugged   Samsung_SSD_840_PRO_Serie
  sys-devices-pci0000:00-0000:00:1f.2-ata2-host1-target1:0:0-1:0:0:0-block-sdb.device loaded active plugged   Samsung_SSD_840_PRO_Serie
  sys-devices-platform-serial8250-tty-ttyS0.device loaded active plugged   /sys/devices/platform/ser
  sys-devices-platform-serial8250-tty-ttyS1.device loaded active plugged   /sys/devices/platform/ser
  sys-devices-platform-serial8250-tty-ttyS2.device loaded active plugged   /sys/devices/platform/ser
  sys-devices-platform-serial8250-tty-ttyS3.device loaded active plugged   /sys/devices/platform/ser
  sys-devices-virtual-block-md126-md126p1.device loaded active plugged   /sys/devices/virtual/bloc
  sys-devices-virtual-block-md126-md126p2.device loaded active plugged   /sys/devices/virtual/bloc
  sys-devices-virtual-block-md126-md126p3.device loaded active plugged   /sys/devices/virtual/bloc
  sys-devices-virtual-block-md126-md126p4.device loaded active plugged   /sys/devices/virtual/bloc
  sys-devices-virtual-block-md126.device loaded active plugged   /sys/devices/virtual/bloc
  sys-devices-virtual-misc-rfkill.device loaded active plugged   /sys/devices/virtual/misc
  sys-module-configfs.device      loaded active plugged   /sys/module/configfs     
  sys-subsystem-bluetooth-devices-hci0.device loaded active plugged   /sys/subsystem/bluetooth/
  sys-subsystem-net-devices-eno1.device loaded active plugged   Ethernet Connection (2) I
  sys-subsystem-net-devices-wlp6s0.device loaded active plugged   BCM4360 802.11ac Wireless
  -.mount                         loaded active mounted   Root Mount               
  boot.mount                      loaded active mounted   /boot                    
  dev-hugepages.mount             loaded active mounted   Huge Pages File System   
  dev-mqueue.mount                loaded active mounted   POSIX Message Queue File 
  run-user-1000.mount             loaded active mounted   /run/user/1000           
  sys-kernel-config.mount         loaded active mounted   Kernel Configuration File
  sys-kernel-debug.mount          loaded active mounted   Kernel Debug File System 
  tmp.mount                       loaded active mounted   Temporary Directory (/tmp
  systemd-ask-password-console.path loaded active waiting   Dispatch Password Request
  systemd-ask-password-wall.path  loaded active waiting   Forward Password Requests
  init.scope                      loaded active running   System and Service Manage
  session-1.scope                 loaded active running   Session 1 of user david  
  alsa-restore.service            loaded active exited    Save/Restore Sound Card S
  dbus.service                    loaded active running   D-Bus System Message Bus 
  dhcpcd@eno1.service             loaded active running   dhcpcd on eno1           
  getty@tty1.service              loaded active running   Getty on tty1            
  kmod-static-nodes.service       loaded active exited    Create list of required s
  lvm2-lvmetad.service            loaded active running   LVM2 metadata daemon     
  lvm2-monitor.service            loaded active exited    Monitoring of LVM2 mirror
  nvidia-persistenced.service     loaded active running   NVIDIA Persistence Daemon
  polkit.service                  loaded active running   Authorization Manager    
  rtkit-daemon.service            loaded active running   RealtimeKit Scheduling Po
● shadow.service                  loaded failed failed    Verify integrity of passw
  systemd-fsck@dev-disk-by\x2duuid-1560\x2dB6A7.service loaded active exited    File System Check on /dev
  systemd-journal-flush.service   loaded active exited    Flush Journal to Persiste
  systemd-journald.service        loaded active running   Journal Service          
  systemd-logind.service          loaded active running   Login Service            
  systemd-random-seed.service     loaded active exited    Load/Save Random Seed    
  systemd-remount-fs.service      loaded active exited    Remount Root and Kernel F
  systemd-sysctl.service          loaded active exited    Apply Kernel Variables   
  systemd-timesyncd.service       loaded active running   Network Time Synchronizat
  systemd-tmpfiles-setup-dev.service loaded active exited    Create Static Device Node
  systemd-tmpfiles-setup.service  loaded active exited    Create Volatile Files and
  systemd-udev-trigger.service    loaded active exited    udev Coldplug all Devices
  systemd-udevd.service           loaded active running   udev Kernel Device Manage
  systemd-update-utmp.service     loaded active exited    Update UTMP about System 
  systemd-user-sessions.service   loaded active exited    Permit User Sessions     
  udisks2.service                 loaded active running   Disk Manager             
  upower.service                  loaded active running   Daemon for power manageme
  user-runtime-dir@1000.service   loaded active exited    User Runtime Directory /r
  user@1000.service               loaded active running   User Manager for UID 1000
  wpa_supplicant.service          loaded active running   WPA supplicant           
  -.slice                         loaded active active    Root Slice               
  system-dhcpcd.slice             loaded active active    system-dhcpcd.slice      
  system-getty.slice              loaded active active    system-getty.slice       
  system-systemd\x2dfsck.slice    loaded active active    system-systemd\x2dfsck.sl
  system.slice                    loaded active active    System Slice             
  user-1000.slice                 loaded active active    User Slice of UID 1000   
  user.slice                      loaded active active    User and Session Slice   
  dbus.socket                     loaded active running   D-Bus System Message Bus 
  dm-event.socket                 loaded active listening Device-mapper event daemo
  lvm2-lvmetad.socket             loaded active running   LVM2 metadata daemon sock
  lvm2-lvmpolld.socket            loaded active listening LVM2 poll daemon socket  
  systemd-coredump.socket         loaded active listening Process Core Dump Socket 
  systemd-initctl.socket          loaded active listening initctl Compatibility Nam
  systemd-journald-audit.socket   loaded active running   Journal Audit Socket     
  systemd-journald-dev-log.socket loaded active running   Journal Socket (/dev/log)
  systemd-journald.socket         loaded active running   Journal Socket           
  systemd-rfkill.socket           loaded active listening Load/Save RF Kill Switch 
  systemd-udevd-control.socket    loaded active running   udev Control Socket      
  systemd-udevd-kernel.socket     loaded active running   udev Kernel Socket       
  dev-disk-by\x2duuid-d4403ea9\x2d9ea7\x2d43c1\x2d8be3\x2d67653e1f5d25.swap loaded active active    /dev/disk/by-uuid/d4403ea
  basic.target                    loaded active active    Basic System             
  bluetooth.target                loaded active active    Bluetooth                
  cryptsetup.target               loaded active active    Local Encrypted Volumes  
  getty.target                    loaded active active    Login Prompts            
  graphical.target                loaded active active    Graphical Interface      
  local-fs-pre.target             loaded active active    Local File Systems (Pre) 
  local-fs.target                 loaded active active    Local File Systems       
  multi-user.target               loaded active active    Multi-User System        
  network.target                  loaded active active    Network                  
  paths.target                    loaded active active    Paths                    
  remote-fs.target                loaded active active    Remote File Systems      
  slices.target                   loaded active active    Slices                   
  sockets.target                  loaded active active    Sockets                  
  sound.target                    loaded active active    Sound Card               
  swap.target                     loaded active active    Swap                     
  sysinit.target                  loaded active active    System Initialization    
  time-sync.target                loaded active active    System Time Synchronized 
  timers.target                   loaded active active    Timers                   
  logrotate.timer                 loaded active waiting   Daily rotation of log fil
  man-db.timer                    loaded active waiting   Daily man-db cache update
  shadow.timer                    loaded active waiting   Daily verification of pas
  systemd-tmpfiles-clean.timer    loaded active waiting   Daily Cleanup of Temporar

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

112 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.
[david@archPC ~]$ ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 10.1.4.40 icmp_seq=3 Packet filtered
From 10.1.4.40 icmp_seq=7 Packet filtered
^C
--- 8.8.8.8 ping statistics ---
25 packets transmitted, 0 received, +2 errors, 100% packet loss, time 335ms

[david@archPC ~]$

Not entirely sure where the rogue DHCP server to blacklist would be. Could you please take a look as well?

Last edited by darkghost568 (2018-11-25 11:27:50)

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#32 2018-11-25 14:51:35

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 78,713

Re: Can't connect via ethernet after update

I meant "systemctl --no-pager status dhcpcd@eno1.service".
Your network is up after theses steps and you've a route (there're no further signs of a rouge dhcp server in the latest post), but still something in the local network, albeit a different subnet is filtering the packets.

tracepath -n 8.8.8.8

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#33 2018-11-25 20:46:38

bugsmanagement
Member
Registered: 2017-04-21
Posts: 201

Re: Can't connect via ethernet after update

Just a caveat, eno1 was configured by NetworkManager at time, when I was helping with DNS testing.

EDIT: As opposed to dhcpcd. It appeared the eno1 was properly setup, since it was able to reach 130.132.1.x. I was hopping the network was simply filtering ICMP packets but allowing UDP/TCP packets to go through. Here's hoping the network is not filtering based on Linux vs Windows clients. smile

EDIT 2: FYI, that host at 130.132.1.56 is reachable via the internet, see below:

[owner@owner-desktop ~]$ ping 130.132.1.56
PING 130.132.1.56 (130.132.1.56) 56(84) bytes of data.
64 bytes from 130.132.1.56: icmp_seq=1 ttl=51 time=19.6 ms
64 bytes from 130.132.1.56: icmp_seq=2 ttl=51 time=19.4 ms
64 bytes from 130.132.1.56: icmp_seq=3 ttl=51 time=18.9 ms

Last edited by bugsmanagement (2018-11-25 20:56:42)

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#34 2018-11-25 21:05:18

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 78,713

Re: Can't connect via ethernet after update

Does the university network maybe use a captive portal as second level auth?
Please always ensure to operate the interface w/ only one service at a time, the secondary service would sufficiently explain the second lease offer.
Also check tracepath to see where the package moves around.

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#35 2018-11-25 23:05:40

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

seth wrote:

Does the university network maybe use a captive portal as second level auth?
Please always ensure to operate the interface w/ only one service at a time, the secondary service would sufficiently explain the second lease offer.
Also check tracepath to see where the package moves around.

You mean like this: https://i.imgur.com/fWJrBnf.png ? Yes, but only for secure University stuff (like checking my grade) and WiFi, no such portal for ethernet. Like I said, I've never had this ethernet connectivity problem before, just started earlier this week (after a routine update, I think).

bugsmanagement wrote:

Just a caveat, eno1 was configured by NetworkManager at time, when I was helping with DNS testing.

EDIT: As opposed to dhcpcd. It appeared the eno1 was properly setup, since it was able to reach 130.132.1.x. I was hopping the network was simply filtering ICMP packets but allowing UDP/TCP packets to go through. Here's hoping the network is not filtering based on Linux vs Windows clients. smile

EDIT 2: FYI, that host at 130.132.1.56 is reachable via the internet, see below:

[owner@owner-desktop ~]$ ping 130.132.1.56
PING 130.132.1.56 (130.132.1.56) 56(84) bytes of data.
64 bytes from 130.132.1.56: icmp_seq=1 ttl=51 time=19.6 ms
64 bytes from 130.132.1.56: icmp_seq=2 ttl=51 time=19.4 ms
64 bytes from 130.132.1.56: icmp_seq=3 ttl=51 time=18.9 ms

I'm pretty sure they don't filter by Linux vs Windows clients because I only started having this problem earlier this week. I actually made sure to run `sudo systemctl disable NetworkManager.service` last time before the terminal output I posted -- I just didn't include it in my post.

seth wrote:

I meant "systemctl --no-pager status dhcpcd@eno1.service".
Your network is up after theses steps and you've a route (there're no further signs of a rouge dhcp server in the latest post), but still something in the local network, albeit a different subnet is filtering the packets.

tracepath -n 8.8.8.8

Oh haha sorry. Here are the requested outputs, now with the `sudo systemctl stop NetworkManager.service` explicitly at the top.

[david@archPC ~]$ sudo systemctl stop NetworkManager.service     
[sudo] password for david: 
[david@archPC ~]$ sudo systemctl start dhcpcd@eno1.service       
[david@archPC ~]$ sudo systemctl --no-pager status dhcpcd@eno1.service
● dhcpcd@eno1.service - dhcpcd on eno1
   Loaded: loaded (/usr/lib/systemd/system/dhcpcd@.service; disabled; vendor preset: disabled)
   Active: active (running) since Sun 2018-11-25 12:44:36 EST; 13s ago
  Process: 1104 ExecStart=/usr/bin/dhcpcd -q -w eno1 (code=exited, status=0/SUCCESS)
 Main PID: 1118 (dhcpcd)
    Tasks: 1 (limit: 4915)
   Memory: 3.1M
   CGroup: /system.slice/system-dhcpcd.slice/dhcpcd@eno1.service
           └─1118 /usr/bin/dhcpcd -q -w eno1

Nov 25 12:44:35 archPC dhcpcd[1104]: DUID 00:04:03:00:02:00:04:00:05:00:00:06:…00:09
Nov 25 12:44:35 archPC dhcpcd[1104]: eno1: IAID 50:d5:1c:af
Nov 25 12:44:35 archPC dhcpcd[1104]: eno1: soliciting an IPv6 router
Nov 25 12:44:36 archPC dhcpcd[1104]: eno1: rebinding lease of 172.19.93.61
Nov 25 12:44:36 archPC dhcpcd[1104]: eno1: leased 172.19.93.61 for 120 seconds
Nov 25 12:44:36 archPC dhcpcd[1104]: eno1: adding route to 172.19.93.0/24
Nov 25 12:44:36 archPC dhcpcd[1104]: eno1: adding default route via 172.19.93.1
Nov 25 12:44:36 archPC dhcpcd[1104]: forked to background, child pid 1118
Nov 25 12:44:36 archPC systemd[1]: Started dhcpcd on eno1.
Nov 25 12:44:47 archPC dhcpcd[1118]: eno1: no IPv6 Routers available
Hint: Some lines were ellipsized, use -l to show in full.
[david@archPC ~]$ tracepath -n 8.8.8.8
 1?: [LOCALHOST]                      pmtu 1500
 1:  128.36.93.1                                           0.565ms 
 1:  128.36.93.1                                           0.512ms 
 2:  10.1.2.13                                             1.114ms 
 3:  10.1.4.40                                             3.665ms 
 4:  10.1.4.40                                             3.021ms !H
     Resume: pmtu 1500 
[david@archPC ~]$

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#36 2018-11-26 08:31:44

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 78,713

Re: Can't connect via ethernet after update

You get a 2 minute lease for 172.19.93.61, the call goes to 128.36.93.1 (Yale IP range) and from there into some LAN (at Yale) where it's filtered.
This very much sounds like a second level auth and the update is perhaps coincidental.
Can you connect using some live distro (eg. grml, ubuntu or some Arch installation iso)?

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#37 2018-11-26 08:54:06

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

seth wrote:

You get a 2 minute lease for 172.19.93.61, the call goes to 128.36.93.1 (Yale IP range) and from there into some LAN (at Yale) where it's filtered.
This very much sounds like a second level auth and the update is perhaps coincidental.
Can you connect using some live distro (eg. grml, ubuntu or some Arch installation iso)?

Ugh yes, you are right. I booted Arch LiveISO and cannot connect. It's frustrating because it used to work just fine, but I guess they changed their system and the update is in fact coincidental. Any advice on how to get second level auth up and working? I'm assuming it wants my netID and password somewhere, but I don't see a spot to input my login credentials.

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#38 2018-11-26 13:49:04

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 78,713

Re: Can't connect via ethernet after update

Did you just try some browser and open a random webpage?

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#39 2018-11-26 22:18:37

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

seth wrote:

Did you just try some browser and open a random webpage?

Yes, I tried with Firefox and it just has the gray dragon with "no internet connection."

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#40 2018-11-26 22:41:57

JohnBobSmith
Member
From: Canada
Registered: 2014-11-29
Posts: 804

Re: Can't connect via ethernet after update

From the original post:

darkghost568 wrote:

...
yesterday's update messed up my ethernet connection. A LOT of packages were updated, so I'm not sure which is the culprit.
...

I would look for .pacnew or .pacsave files, just in case. It's possible something got reconfigured during the update by mistake.  https://wiki.archlinux.org/index.php/Pa … nd_Pacsave.

I am diagnosed with bipolar disorder. As it turns out, what I thought was my greatest weakness is now my greatest strength.

Everyday, I make a conscious choice to overcome my challenges and my problems. It's not easy, but its better than the alternative...

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#41 2018-11-26 22:49:54

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

JohnBobSmith wrote:

From the original post:

darkghost568 wrote:

...
yesterday's update messed up my ethernet connection. A LOT of packages were updated, so I'm not sure which is the culprit.
...

I would look for .pacnew or .pacsave files, just in case. It's possible something got reconfigured during the update by mistake.  https://wiki.archlinux.org/index.php/Pa … nd_Pacsave.

It seems like Seth is right that this is a second level auth thing, since when I boot the live ArchISO I made a few months ago (haven't updated) I still can't connect, so it seems that my Uni may have changed their networking recently.

Last edited by darkghost568 (2018-11-26 22:50:39)

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#42 2018-11-26 23:35:29

bugsmanagement
Member
Registered: 2017-04-21
Posts: 201

Re: Can't connect via ethernet after update

darkghost568 wrote:
JohnBobSmith wrote:

From the original post:

darkghost568 wrote:

...
yesterday's update messed up my ethernet connection. A LOT of packages were updated, so I'm not sure which is the culprit.
...

I would look for .pacnew or .pacsave files, just in case. It's possible something got reconfigured during the update by mistake.  https://wiki.archlinux.org/index.php/Pa … nd_Pacsave.

It seems like Seth is right that this is a second level auth thing, since when I boot the live ArchISO I made a few months ago (haven't updated) I still can't connect, so it seems that my Uni may have changed their networking recently.

Sadly, although IIRC, the internet was still reachable when you boot into Windows?

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#43 2018-11-26 23:41:24

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

bugsmanagement wrote:
darkghost568 wrote:
JohnBobSmith wrote:

From the original post:

I would look for .pacnew or .pacsave files, just in case. It's possible something got reconfigured during the update by mistake.  https://wiki.archlinux.org/index.php/Pa … nd_Pacsave.

It seems like Seth is right that this is a second level auth thing, since when I boot the live ArchISO I made a few months ago (haven't updated) I still can't connect, so it seems that my Uni may have changed their networking recently.

Sadly, although IIRC, the internet was still reachable when you boot into Windows?

Yes, without any additional set up at the end-user level. macOS works too (I have a hackintosh external drive as well).

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#44 2018-11-26 23:46:54

bugsmanagement
Member
Registered: 2017-04-21
Posts: 201

Re: Can't connect via ethernet after update

darkghost568 wrote:
bugsmanagement wrote:
darkghost568 wrote:

It seems like Seth is right that this is a second level auth thing, since when I boot the live ArchISO I made a few months ago (haven't updated) I still can't connect, so it seems that my Uni may have changed their networking recently.

Sadly, although IIRC, the internet was still reachable when you boot into Windows?

Yes, without any additional set up at the end-user level. macOS works too (I have a hackintosh external drive as well).

Could you at least do what Seth suggested, and try Ubuntu for example?

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#45 2018-11-26 23:48:27

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

bugsmanagement wrote:
darkghost568 wrote:
bugsmanagement wrote:

Sadly, although IIRC, the internet was still reachable when you boot into Windows?

Yes, without any additional set up at the end-user level. macOS works too (I have a hackintosh external drive as well).

Could you at least do what Seth suggested, and try Ubuntu for example?

I mean he suggested the Arch installation iso as well, but I can try Ubuntu.

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#46 2018-11-26 23:52:23

bugsmanagement
Member
Registered: 2017-04-21
Posts: 201

Re: Can't connect via ethernet after update

darkghost568 wrote:
bugsmanagement wrote:
darkghost568 wrote:

Yes, without any additional set up at the end-user level. macOS works too (I have a hackintosh external drive as well).

Could you at least do what Seth suggested, and try Ubuntu for example?

I mean he suggested the Arch installation iso as well, but I can try Ubuntu.

Great! The idea here is, process of elimination, Ubuntu seems like I good fit. So whatever helpful diagnostics when can get from trying Ubuntu, would be indeed helpful. Just to clarify, I'm referring to Ubuntu Live ISO, not a full blow Ubuntu install.

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#47 2018-11-27 05:04:36

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

bugsmanagement wrote:
darkghost568 wrote:
bugsmanagement wrote:

Could you at least do what Seth suggested, and try Ubuntu for example?

I mean he suggested the Arch installation iso as well, but I can try Ubuntu.

Great! The idea here is, process of elimination, Ubuntu seems like I good fit. So whatever helpful diagnostics when can get from trying Ubuntu, would be indeed helpful. Just to clarify, I'm referring to Ubuntu Live ISO, not a full blow Ubuntu install.

Ok so I booted Ubuntu Live ISO and still wasn't able to connect. I wasn't entirely sure what commands to run, and Ubuntu seems to come prepackaged with NetworkManager instead of dhcpcd. Here are some outputs to start off, and please suggest some more that you'd like to see:

ubuntu@ubuntu:~$ sudo ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 54:a0:50:d5:1c:af brd ff:ff:ff:ff:ff:ff
ubuntu@ubuntu:~$ sudo systemctl status NetworkManager.service
● NetworkManager.service - Network Manager
   Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor p
   Active: active (running) since Mon 2018-11-26 23:38:12 UTC; 8min ago
     Docs: man:NetworkManager(8)
 Main PID: 1871 (NetworkManager)
    Tasks: 4 (limit: 4915)
   Memory: 21.2M
   CGroup: /system.slice/NetworkManager.service
           ├─1871 /usr/sbin/NetworkManager --no-daemon
           └─2319 /sbin/dhclient -d -q -sf /usr/lib/NetworkManager/nm-dhcp-helpe

Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8188] dhcp4 (en
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8188] dhcp4 (en
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4 (en
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4 (en
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4 (en
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4 (en
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4 (en
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4 (en
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8190] dhcp4 (en
Nov 26 23:46:26 ubuntu dhclient[2319]: bound to 172.19.93.106 -- renewal in 48 s

ubuntu@ubuntu:~$ sudo systemctl --no-pager status NetworkManager.service
● NetworkManager.service - Network Manager
   Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2018-11-26 23:38:12 UTC; 9min ago
     Docs: man:NetworkManager(8)
 Main PID: 1871 (NetworkManager)
    Tasks: 4 (limit: 4915)
   Memory: 21.2M
   CGroup: /system.slice/NetworkManager.service
           ├─1871 /usr/sbin/NetworkManager --no-daemon
           └─2319 /sbin/dhclient -d -q -sf /usr/lib/NetworkManager/nm-dhcp-help…

Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8188] dhcp4….0)
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8188] dhcp4…3.1
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4…120
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4….9'
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4…10'
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4…al'
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4…71'
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8189] dhcp4…58'
Nov 26 23:46:26 ubuntu NetworkManager[1871]: <info>  [1543275986.8190] dhcp4…und
Nov 26 23:46:26 ubuntu dhclient[2319]: bound to 172.19.93.106 -- renewal in…nds.
Hint: Some lines were ellipsized, use -l to show in full.
ubuntu@ubuntu:~$

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#48 2018-11-27 05:17:16

bugsmanagement
Member
Registered: 2017-04-21
Posts: 201

Re: Can't connect via ethernet after update

What we gain from here, it appears Linux is the only OS affected. Short from trying a different Ethernet port, asking friends if they are experiencing similar problems. Then again it could be just the weekend, and the IT folks haven't had a chance to discover the problem? Hoping.

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#49 2018-11-27 05:24:32

darkghost568
Member
Registered: 2018-02-24
Posts: 34

Re: Can't connect via ethernet after update

bugsmanagement wrote:

What we gain from here, it appears Linux is the only OS affected. Short from trying a different Ethernet port, asking friends if they are experiencing similar problems. Then again it could be just the weekend, and the IT folks haven't had a chance to discover the problem? Hoping.

Damn. My room only has 1 ethernet port, and none of my friends use linux sadly (macOS is the dominant OS around here). That's true about it being a weekend thing, since Yale's been on Thanksgiving for the past week and today is the first day back. I'll keep you guys posted, and if there's anything else you think of for me to check, please let me know! Thanks again for all your help and patience so far smile

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