[wellylug] Re: Can't access linux conf site

[pete at marchingcubes.com]

> Hi Jethro,
>
> Are you blocking "fragmentation needed" ICMP packets (ICMP type 3,
> subtype 4)?
>
> And do you have PMTU enabled?
> 	[me at mybox ~]# cat /proc/sys/net/ipv4/ip_no_pmtu_disc
> 	0
>
> These should do the MTU heavy lifting for you.
>
> Take care,
>
> Gawain
>

Also, if you have TCP Explicit Congestion Notification enabled, your
packets will be silently dropped by routers which do not support this
functionality.

/proc/sys/net/ipv4/tcp_ecn

If this is setting is present, and set to 1, it may be the problem.

-Pete