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#1 2022-09-28 00:12:54

Firestar
Member
From: Beijing, China
Registered: 2021-07-19
Posts: 116
Website

[Solved] Ethernet cannot get access to the internet

When I connected to wifi, KDE says that I am connected and I can get access to the internet

When I connected to Ethernet, KDE says that I am connected but I cannot get access to the internet, I cannot go to any website!

$ lspci -v

00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (13) I219-V (rev 20)
        Subsystem: Lenovo Device 22d1
        Flags: bus master, fast devsel, latency 0, IRQ 157, IOMMU group 13
        Memory at bce00000 (32-bit, non-prefetchable) [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: e1000e
        Kernel modules: e1000e
$ sudo dmesg | grep e1000e
[    1.904755] e1000e: Intel(R) PRO/1000 Network Driver
[    1.904759] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[    1.905292] e1000e 0000:00:1f.6: Interrupt Throttling Rate (ints/sec) set to dynamic conservative mode
[    2.353868] e1000e 0000:00:1f.6 0000:00:1f.6 (uninitialized): registered PHC clock
[    2.433575] e1000e 0000:00:1f.6 eth0: (PCI Express:2.5GT/s:Width x1) 38:f3:ab:4c:6e:f5
[    2.433584] e1000e 0000:00:1f.6 eth0: Intel(R) PRO/1000 Network Connection
[    2.433772] e1000e 0000:00:1f.6 eth0: MAC: 14, PHY: 12, PBA No: FFFFFF-0FF
[    2.568601] e1000e 0000:00:1f.6 enp0s31f6: renamed from eth0

Does this means that the ethernet is not loaded?

Last edited by Firestar (2022-09-28 13:46:26)

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Write programs to work together.
Write programs to handle text streams, because that is a universal interface.

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#2 2022-09-28 01:30:19

ewaller
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From: Pasadena, CA
Registered: 2009-07-13
Posts: 20,659

Re: [Solved] Ethernet cannot get access to the internet

What are the output of ip addr and of resolvectl   ?

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#3 2022-09-28 01:32:35

Firestar
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From: Beijing, China
Registered: 2021-07-19
Posts: 116
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Re: [Solved] Ethernet cannot get access to the internet

$ ip addr
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: wwp0s20f0u2i1: <BROADCAST,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether e6:37:35:a7:38:04 brd ff:ff:ff:ff:ff:ff
4: wlp9s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 7e:43:7e:b9:7c:f8 brd ff:ff:ff:ff:ff:ff permaddr 1c:99:57:c6:bc:ea
5: enp0s13f0u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:e0:4c:78:32:00 brd ff:ff:ff:ff:ff:ff
    inet 10.129.223.43/19 brd 10.129.223.255 scope global dynamic noprefixroute enp0s13f0u2u4
       valid_lft 3009sec preferred_lft 3009sec
    inet6 fe80::898d:74a9:879:7f96/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
6: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 38:f3:ab:4c:6e:f5 brd ff:ff:ff:ff:ff:ff

$ resolvectl
Failed to get global data: Unit dbus-org.freedesktop.resolve1.service not found.

Last edited by Firestar (2022-09-28 01:35:50)

Write programs that do one thing and do it well.
Write programs to work together.
Write programs to handle text streams, because that is a universal interface.

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#4 2022-09-28 02:44:40

Scimmia
Fellow
Registered: 2012-09-01
Posts: 13,729

Re: [Solved] Ethernet cannot get access to the internet

You have 2 ethernet adapters, and you're connecting a different one than the one in the first post.

You appear to be getting an IP. How are you configuring the network?

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#5 2022-09-28 03:37:58

Firestar
Member
From: Beijing, China
Registered: 2021-07-19
Posts: 116
Website

Re: [Solved] Ethernet cannot get access to the internet

I installed archlinux as guided in archwiki and no customizations, just installed networkmanager

$ cat /etc/hosts
# Static table lookup for hostnames.
# See hosts(5) for details.
127.0.0.1       localhost
::1             localhost
127.0.1.1       ThinkPad

I found that there are `USB Ethernet` and `PCI Ethernet` here, and `PCI Ethernet` says:

Could not activate connection: Connection 'PKU-Ethernet' is not available on device enp0s31f6 because device has no carrier

The one which cannot connect to any website is `USB Ethernet`

Last edited by Firestar (2022-09-28 05:17:52)

Write programs that do one thing and do it well.
Write programs to work together.
Write programs to handle text streams, because that is a universal interface.

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#6 2022-09-28 05:58:21

Firestar
Member
From: Beijing, China
Registered: 2021-07-19
Posts: 116
Website

Re: [Solved] Ethernet cannot get access to the internet

I tried delete all ethernet connections from KDE systemsettings and plugin the ethernet cable, this is the output:

$ ip addr
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: wwp0s20f0u2i1: <BROADCAST,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether e6:37:35:a7:38:04 brd ff:ff:ff:ff:ff:ff
4: wlp9s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 1c:99:57:c6:bc:ea brd ff:ff:ff:ff:ff:ff
    inet 10.2.32.215/19 brd 10.2.63.255 scope global dynamic noprefixroute wlp9s0
       valid_lft 1932sec preferred_lft 1932sec
    inet6 2001:da8:201:3042:35fe:b7fe:39f5:5b73/64 scope global dynamic noprefixroute 
       valid_lft 2592001sec preferred_lft 604801sec
    inet6 fe80::89b7:e449:f09d:7330/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
6: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 38:f3:ab:4c:6e:f5 brd ff:ff:ff:ff:ff:ff
9: enp0s13f0u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:e0:4c:78:32:00 brd ff:ff:ff:ff:ff:ff

Write programs that do one thing and do it well.
Write programs to work together.
Write programs to handle text streams, because that is a universal interface.

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#7 2022-09-28 07:02:27

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 76,483

Re: [Solved] Ethernet cannot get access to the internet

6: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 38:f3:ab:4c:6e:f5 brd ff:ff:ff:ff:ff:ff
9: enp0s13f0u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:e0:4c:78:32:00 brd ff:ff:ff:ff:ff:ff

There's a rj45 cable in the usb dongle, but not in the built-in WiFi nic.

The one which cannot connect to any website is `USB Ethernet`

Restore your network profile so that you're back at the situation in #3
Then post the outputs of

ip a # just to be sure
ip r
cat /etc/resolv.conf
ping -c1 _gateway
ping -c1 8.8.8.8
ping -c1 google.com
dig google.com
dig @8.8.8.8 google.com

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#8 2022-09-28 07:22:09

Firestar
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From: Beijing, China
Registered: 2021-07-19
Posts: 116
Website

Re: [Solved] Ethernet cannot get access to the internet

I test it on windows so that I can confirm the network is OK, only that I am not connected to it.

Write programs that do one thing and do it well.
Write programs to work together.
Write programs to handle text streams, because that is a universal interface.

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#9 2022-09-28 07:32:42

Firestar
Member
From: Beijing, China
Registered: 2021-07-19
Posts: 116
Website

Re: [Solved] Ethernet cannot get access to the internet

This is tested when I have no wifi connections and only with an ethernet that cannot go to any website

$ ip addr
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: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 38:f3:ab:4c:6e:f5 brd ff:ff:ff:ff:ff:ff
3: enp0s13f0u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:e0:4c:78:32:00 brd ff:ff:ff:ff:ff:ff
    inet 10.129.223.43/19 brd 10.129.223.255 scope global dynamic noprefixroute enp0s13f0u2u4
       valid_lft 2962sec preferred_lft 2962sec
    inet6 240c:c001:1:2761:138a:7651:e53c:202/64 scope global dynamic noprefixroute 
       valid_lft 259126sec preferred_lft 172726sec
    inet6 240c:c001:1:255a:c89e:3b4:98a0:c16/64 scope global dynamic noprefixroute 
       valid_lft 259175sec preferred_lft 172775sec
    inet6 fe80::8cd:7f7f:56:8a68/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4: wlp9s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether a2:62:f6:6a:ae:76 brd ff:ff:ff:ff:ff:ff permaddr 1c:99:57:c6:bc:ea
5: wwp0s20f0u2i1: <BROADCAST,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether e6:37:35:a7:38:04 brd ff:ff:ff:ff:ff:ff
$ 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: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 38:f3:ab:4c:6e:f5 brd ff:ff:ff:ff:ff:ff
3: enp0s13f0u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:e0:4c:78:32:00 brd ff:ff:ff:ff:ff:ff
    inet 10.129.223.43/19 brd 10.129.223.255 scope global dynamic noprefixroute enp0s13f0u2u4
       valid_lft 3521sec preferred_lft 3521sec
    inet6 240c:c001:1:2761:138a:7651:e53c:202/64 scope global dynamic noprefixroute 
       valid_lft 259156sec preferred_lft 172756sec
    inet6 240c:c001:1:255a:c89e:3b4:98a0:c16/64 scope global dynamic noprefixroute 
       valid_lft 259120sec preferred_lft 172720sec
    inet6 fe80::8cd:7f7f:56:8a68/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4: wlp9s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 66:bd:e2:c9:b9:b7 brd ff:ff:ff:ff:ff:ff permaddr 1c:99:57:c6:bc:ea
5: wwp0s20f0u2i1: <BROADCAST,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether e6:37:35:a7:38:04 brd ff:ff:ff:ff:ff:ff
[bash @ ThinkPad ~] (15:29:40)
$ ip r
default via 10.129.192.1 dev enp0s13f0u2u4 proto dhcp src 10.129.223.43 metric 100 
10.129.192.0/19 dev enp0s13f0u2u4 proto kernel scope link src 10.129.223.43 metric 100 
[bash @ ThinkPad ~] (15:29:44)
$ cat /etc/resolv.conf 
# v2rayA DNS hijack
nameserver 127.2.0.17
nameserver 119.29.29.29
[bash @ ThinkPad ~] (15:29:51)
$ ping -c1 _gateway
PING _gateway (10.129.192.1) 56(84) bytes of data.
64 bytes from _gateway (10.129.192.1): icmp_seq=1 ttl=255 time=0.504 ms

--- _gateway ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.504/0.504/0.504/0.000 ms
[bash @ ThinkPad ~] (15:29:58)
$ ping -c1 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=112 time=50.9 ms

--- 8.8.8.8 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 50.885/50.885/50.885/0.000 ms
[bash @ ThinkPad ~] (15:30:05)
$ ping -c1 archlinux.org
PING archlinux.org(archlinux.org (2a01:4f9:c010:6b1f::1)) 56 data bytes

--- archlinux.org ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms

I have no `dig` `drill` or `domain` command

Last edited by Firestar (2022-09-28 07:40:50)

Write programs that do one thing and do it well.
Write programs to work together.
Write programs to handle text streams, because that is a universal interface.

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#10 2022-09-28 07:42:48

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 76,483

Re: [Solved] Ethernet cannot get access to the internet

bind and ldns packages, however you can ping IPv4's but whatever 

# v2rayA DNS hijack
nameserver 127.2.0.17
nameserver 119.29.29.29

is resolves you an IPv6 for archlinux.org (i kida asked for google.com…) and you don't seem to have any route there.

So the problem is your resolver, apparently "v2rayA DNS hijack"

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#11 2022-09-28 07:46:37

Firestar
Member
From: Beijing, China
Registered: 2021-07-19
Posts: 116
Website

Re: [Solved] Ethernet cannot get access to the internet

I am in China which cannot access to google.com

even with v2ray, it says:

```
$ ping -c1 google.com
PING google.com (59.24.3.174) 56(84) bytes of data.

--- google.com ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms
```

on the other hand, why I can connect through wifi? I can connect any website via wifi and ping to archlinux.org but not 8.8.8.8

Last edited by Firestar (2022-09-28 07:50:03)

Write programs that do one thing and do it well.
Write programs to work together.
Write programs to handle text streams, because that is a universal interface.

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#12 2022-09-28 07:52:20

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 76,483

Re: [Solved] Ethernet cannot get access to the internet

even with v2ray, it says:

No, *because* of v2ray

I am in China which cannot access to google.com

$ ping -c1 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=112 time=50.9 ms

8.8.8.8 is googles DNS server…

Try to alter the resolv.conf

nameserver 1.1.1.1
nameserver 8.8.8.8
nameserver 9.9.9.9

(cloudflare, google and quad9)

on the other hand, why I can connect through wifi?

I've no idea because we've not seen the wifi conneciton, but it's obvious that this is a DNS issue only.

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#13 2022-09-28 11:21:22

Lone_Wolf
Administrator
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 15,167

Re: [Solved] Ethernet cannot get access to the internet

looks like firestar responded in the other thread, see https://bbs.archlinux.org/viewtopic.php … 3#p2059533

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

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#14 2022-09-28 12:34:53

seth
Member
From: Won't reply 2 private help req
Registered: 2012-09-03
Posts: 76,483

Re: [Solved] Ethernet cannot get access to the internet

The wifi situation there lacks the resolver config, but

Firestar wrote:

I changed dns and it worked, I am asking v2raya how to not hijack as `sudo chattr +i /etc/resolv.conf` does not work

I'm not familiar w/ the tool, but it would seem that it configures itself as DNS server, likely for a reason.

- Why do you use v2raya itfp?
- If you want to use it, what's the output of "nmap 127.2.0.17"?
- what's the output of "dig @127.2.0.17 archlinux.org" and "dig @119.29.29.29 archlinux.org" (the latter one just times out here)
- Since it principally configures IPv4 nameservers, what if you just disable the https://wiki.archlinux.org/title/IPv6#Disable_IPv6 stack?

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#15 2022-09-28 13:30:46

Firestar
Member
From: Beijing, China
Registered: 2021-07-19
Posts: 116
Website

Re: [Solved] Ethernet cannot get access to the internet

I changed dns and it worked

this is wifi

[bash @ ThinkPad ~] (16:11:13)
$ 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: wlp9s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 1c:99:57:c6:bc:ea brd ff:ff:ff:ff:ff:ff
    inet 10.2.32.215/19 brd 10.2.63.255 scope global dynamic noprefixroute wlp9s0
       valid_lft 2766sec preferred_lft 2766sec
    inet6 2001:da8:201:3042:35fe:b7fe:39f5:5b73/64 scope global dynamic noprefixroute 
       valid_lft 2591999sec preferred_lft 604799sec
    inet6 fe80::89b7:e449:f09d:7330/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 38:f3:ab:4c:6e:f5 brd ff:ff:ff:ff:ff:ff
4: enp0s13f0u2u4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:e0:4c:78:32:00 brd ff:ff:ff:ff:ff:ff
5: wwp0s20f0u2i1: <BROADCAST,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether e6:37:35:a7:38:04 brd ff:ff:ff:ff:ff:ff
[bash @ ThinkPad ~] (16:11:20)
$ ip r
default via 10.2.32.1 dev wlp9s0 proto dhcp src 10.2.32.215 metric 600 
10.2.32.0/19 dev wlp9s0 proto kernel scope link src 10.2.32.215 metric 600

Last edited by Firestar (2022-09-28 13:46:04)

Write programs that do one thing and do it well.
Write programs to work together.
Write programs to handle text streams, because that is a universal interface.

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#16 2022-09-28 13:34:55

Firestar
Member
From: Beijing, China
Registered: 2021-07-19
Posts: 116
Website

Re: [Solved] Ethernet cannot get access to the internet

OK I solve it by this:

1. turn off the dns hijack of v2raya (turn off "prevent dns spoofing"), this will allow me to set it manually, like 8.8.8.8 or my school network DNS
2. `sudo chattr +i /etc/resolv.conf`

PS: it takes a very long time (like 1min) to set up dns by networkmanager when I connect to ethernet which may be the cause, so I locked the dns file

Last edited by Firestar (2022-09-28 13:36:26)

Write programs that do one thing and do it well.
Write programs to work together.
Write programs to handle text streams, because that is a universal interface.

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