[SOLVED] SSH Connection Timeouts Post-Upgrade...

purple12 · 2014-02-15 05:25:39

Just decided to bypass DHCP altogether and use the Arch docs to setup a static IP. Root cause for the failure was a misconfig on my router. --sorry, and thanks again.
==================

My ssh setup was working until a few days ago. It seemed to fail right after a one-week update of installed packages (I usually try to at least check daily, but hadn't for about a week) The timing could be coincidental, I suppose. Anyway, I have been connecting via ssh keys to my home system since forever....haven't made any config changes. Let's see...I checked my IP and host status with Dyndns--no warnings or expirations that I can see.

I've always run ssh on a non-standard port, and I can telnet to localhost on my designated ssh port. When I run my ssh connect attempt with verbose flags, the service confirms it's reading /etc/ssh/ssh_config, tries to connect to my host at the correct IP, on the correct port, then times out. Traceroute shows only one hop to my router, then splat! ...nothing.

I've had minor issues with daemon startup since the switch to systemd, so I've always included a few service restarts as part of every post-reboot startup. Usually, I bounce stunnel, openntpd and sshd and have zero problems afterwards. Could something have been overwritten during updates? Also can't help wondering if this might relate somehow to my DHCP service, since at least once in the past I was able to resolve a similar issue by release / renew...

Here are some details. Be gentle...networking n00b here.

--THANKS!

Service looks OK:

$ systemctl status sshd
sshd.service - OpenSSH Daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled)
   Active: active (running) since Fri 2014-02-14 20:56:28 PST; 2min 50s ago
 Main PID: 6508 (sshd)
   CGroup: /system.slice/sshd.service
           `-6508 /usr/bin/sshd -D

Feb 14 20:56:28 my-host sshd[6508]: Server listening on 0.0.0.0 port ****.
Feb 14 20:56:28 my-host sshd[6508]: Server listening on :: port ****.
Feb 14 20:56:28 my-host systemd[1]: Stopping OpenSSH Daemon...
Feb 14 20:56:28 my-host systemd[1]: Starting OpenSSH Daemon...
Feb 14 20:56:28 my-host systemd[1]: Started OpenSSH Daemon.

Configs:

/etc/ssh/sshd_config:
-------------------------------------
Port ****
Protocol 2
PermitRootLogin no
AuthorizedKeysFile      .ssh/authorized_keys
PasswordAuthentication no
ChallengeResponseAuthentication no
UsePAM yes
AllowTcpForwarding yes
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes
Subsystem       sftp    /usr/lib/ssh/sftp-server


/etc/ssh/ssh_config:
---------------------------
PasswordAuthentication no
Port ****
Protocol 2

$ sudo dhcpcd
dhcpcd[6707]: version 6.2.1 starting
dhcpcd[6707]: DUID <mac addy stuff>
dhcpcd[6707]: eth0: IAID **:**:**:** <more cryptic numbers>
dhcpcd[6707]: eth0: soliciting an IPv6 router
dhcpcd[6707]: eth0: rebinding lease of 192.168.1.103
dhcpcd[6707]: eth0: NAK: from 192.168.1.100
dhcpcd[6707]: eth0: soliciting a DHCP lease
dhcpcd[6707]: eth0: offered 192.168.1.104 from 192.168.1.100
dhcpcd[6707]: eth0: leased 192.168.1.104 for 86400 seconds
dhcpcd[6707]: eth0: adding route to 192.168.1.0/24
dhcpcd[6707]: eth0: adding default route via 192.168.1.100
dhcpcd[6707]: forked to background, child pid 6742

$ pgrep dhcpcd
607
6742

..hmmm  why two pids?

Last edited by purple12 (2014-02-17 01:01:02)

Rexilion · 2014-02-15 20:03:51

Try killing one of the dhcpcd instances and see if it resolves your issue?

Arch Linux

#1 2014-02-15 05:25:39

[SOLVED] SSH Connection Timeouts Post-Upgrade...

#2 2014-02-15 20:03:51

Re: [SOLVED] SSH Connection Timeouts Post-Upgrade...

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