[OmniOS-discuss] strangeness ssh into omnios from oi_151a9

[Richard PALO]

Le 28/09/15 17:40, Lauri Tirkkonen a écrit :
> It just occurred to me that if timestamp options don't get negotiated at
> all on the connection, both peers should be fine with this injection and
> continue to function. So as a workaround you could try disabling
> timestamps on the oi_151a9 box. I see the following ndd options:
>
>      % ndd -get tcp ?|grep tstamp
>      tcp_tstamp_always              (read and write)
>      tcp_tstamp_if_wscale           (read and write)
>
> You could try setting those to 0 and see if that works around the hang
> (untested, so beware). This obviously turns off TCP timestamps, but how
> useful are they on the pre-5850 box anyway if your middlebox has been
> defeating their use all this time? :)
>

On OI (actually on both):
> richard at smicro:~$ ndd -get tcp  tcp_tstamp_always
> 0
> richard at smicro:~$ ndd -get tcp  tcp_tstamp_if_wscale
> 1

so if I understand correctly, setting tcp_tstamp_if_wscale
on OI will turn off timestamps avoiding the issue with 5850 on Omnios.

I'll give it a try.

Since I'm not having any issues with netbsd (6.1), which seemingly is 
still at rfc1323
> richard at omnis:/home/richard$ ssh netbsd.org /sbin/sysctl net.inet.tcp.rfc1323
> net.inet.tcp.rfc1323 = 1

I'd like to do some additional tests involving a non-illumos host as 
well just to make sure.

terveisin, risto3