Re: Strange ssh hangups, netbsd-9 GENERIC

[RVP <rvp%SDF.ORG@localhost>]

On Thu, 18 Mar 2021, Louis Guillaume wrote:

> Ok - i did something similar with "nc" and text files in /var/log. It is able 
> to connect and transfer up to and no more that 6144 bytes before closing. 
> This seems to be consistent with what I was seeing via ssh.
>
> Smaller files transfer completely, but anything larger than 6144b is 
> truncated at exactly 6144b == 6k.
>
> After some reading, that seems to smell like some kind of MTU or maybe jumbo 
> frame business. All systems here on on gigabit ethernet. Just a hunch. Maybe 
> it's my switch.

Try turning jumbo frames off--you don't really need it. Reboot the switch
also.

> I can't rule out the firewall (ipfilter) - but even if that is the cause, 
> this would be unexpected behavior.

Try a port (both on nc(1) and sshd) other than 22.

-RVP