[wellylug] Re: Can't access linux conf site
Gawain Lynch
gawain.lynch at bigpond.com
Mon Nov 14 09:35:05 NZDT 2005
On Sun, 2005-11-13 at 19:26 +1300, Jethro Carr wrote:
> well, after a discussion with the linux conf guys, I have fixed the
> problem.
>
> I had to change my Max Transmission Unit (MTU) value, from 1500 to 300.
> This helps it get past badly configured firewalls in the path of my
> traffic.
>
> I blame the windows server I saw on the netcraft results. ;-)
>
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
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