Re: ssh problem
randall wrote:
> Bertrand Yvain wrote:
>> On Wed, Aug 26, 2009 at 05:12:36PM +0200, randall wrote:
>>> Bertrand Yvain wrote:
>>>> Looks like a PMTU issue.
>>>> Would you happen to have net.ipv4.ip_no_pmtu_disc = 1 in your sysctls?
>>>>
>>> but below answers the question, nope.
>> The resource might be set by something else. You can check the actual
>> value like this:
>>
>> # /sbin/sysctl net.ipv4.ip_no_pmtu_disc
>>
>> If it's still 0, my guess stays on MTU.
>
host:~# sysctl net.ipv4.ip_no_pmtu_disc
net.ipv4.ip_no_pmtu_disc = 0
>
setting ifconfig eth0 mtu 1280
does seem to help and solves the immediate problem, i have a working
connection again. Thanks ;)
not sure what i did to ***** this up, actually no idea what the MTU
actually does apart from what i read on google the last ten minutes.
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>>> just noticed that i do can cat small files, it hangs on more substantial
>>> sized files though.
>> I guess that "small" is around your MTU on eth0. Should be 1500 for
>> regular ethernet, but there might be an encapsulation layer somewhere...
>>
>> You should try lowering it to something safe:
>>
>> # ifconfig eth0 mtu 1280
>>
>> This will most probably fix your problem. Then you'll have to
>> investigate why the default MTU is not good for your network and what
>> should be the max allowed value.
>>
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