FreeBSD NFS server not responding to TCP SYN packets from Linux/SunOS clients

[Nicolas KOWALSKI]

Eric Anderson <anderson at centtech.com> writes:

> Nicolas KOWALSKI wrote:
>> Eric Anderson <anderson at centtech.com> writes:
>>
>>>Nicolas KOWALSKI wrote:
>>>
>>>>Mike Silbersack <silby at silby.com> writes:
>>>>
>>>>
>>>>>Actually, there may be a quick fix for this specific machine.  If
>>>>>you set net.inet.tcp.keepidle to 1 minute (60*whatever kern.hz
>>>>>is), that'll cause keepalive packets to be sent every minute to
>>>>>an idle connection, rather than every 2 hours.  That would kill
>>>>>the stuck connections much quicker.
>>
>>>>Unfortunately, this does not work as expected. I just tested with
>>>>my workstation (Linux 2.6), with NFS filesystems mounted with TCP;
>>>>when the station rebooted abruptely, mounting the same NFS
>>>>filesystems hung more than 1 minute (15 minutes just now). During
>>>>this hang, I saw on the server, using netstat, the nfsd process
>>>>related to my workstation in ESTABLISHED state.
>>>
>>>
>>>Man fixmount?
>> This is a FreeBSD-only command apparently. I did not find it on
>> Linux or Solaris. It could have been useful, by calling it before
>> NFS filesystems are mounted on clients, yes.
>
> It's available on Fedora Core 2 and 3 at least.

So, its a non-option, because we are only using Debian Sarge and
Solaris 9 UNIX workstations. :-(

Thanks for your advice,
-- 
Nicolas