Frequent "Connection reset by peer"

Darren Tucker dtucker at
Tue Jan 29 16:11:32 EST 2008

Tuc at T-B-O-H wrote:
> 	Is there a way to tell why I'm getting frequent 
> "Connection reset by peer" all of a sudden? 
> 	I'm using a FreeBSD machine, plugged via eithernet to a Linksys 
> router running DD-WRT, to another Linksys 50 feet away running DD-WRT, 
> both of them WDS'd together, plugged via ethernet to another FreeBSD machine.
> With debug cranked, I see :

1) check the SSH server's logs to see if there's any logged message 
corresponding to the disconnects.  If the problem is easy to reproduce, 
you could run sshd in debug mode in the foreground (eg "/path/to/sshd 
-ddde -p 2022" then connect to port 22).

2) if that doesn't have anything, or has the same "connection reset by 
peer message" then you probably will need to run tcpdump or similar to 
see which end is generating the TCP RST (in theory it should be only 
generated by one of the TCP endpoints but it could also be generated by, 
eg an intermediate NAT box).

Darren Tucker (dtucker at
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
     Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.

More information about the openssh-unix-dev mailing list