Date: Thu, 20 May 2010 06:24:43 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Chuck Swiger <cswiger@mac.com> Cc: Marco Beishuizen <mbeis@xs4all.nl>, freebsd-questions@freebsd.org Subject: Re: downloading e-mail is blocking network Message-ID: <4BF4C79B.3070804@infracaninophile.co.uk> In-Reply-To: <9D3EAB27-FC60-4B6E-91EE-6110D0061805@mac.com> References: <alpine.BSF.2.00.1005192101570.5174@yokozuna.lan> <F624D697-FB70-45BC-AAE3-250C10B927E9@mac.com> <alpine.BSF.2.00.1005192237570.7083@yokozuna.lan> <9D3EAB27-FC60-4B6E-91EE-6110D0061805@mac.com>
next in thread | previous in thread | raw e-mail | index | archive | help
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 19/05/2010 21:48:36, Chuck Swiger wrote: > On May 19, 2010, at 1:44 PM, Marco Beishuizen wrote: >> On Wed, 19 May 2010, Chuck Swiger wrote: >>> Are you using NAT? >> >> Not that I know of. > > You presumably would know from the IP your machine has-- if it's RFC-1918 unroutable, NAT is involved. > >>> It sounds like something has a limited number of NAT state slots available, and is dropping connections past that limit. It probably will help to try to serialize the activity of fetchmail / procmail so that they aren't opening new connections for every email being processed, if that is what is going on. >> >> Seems worth trying to increase this number but how do I do that? Is this changable in FreeBSD or do I change this in the modem (couldn't find anything about this in the modem though)? > > It would be in whatever device is doing NAT, assuming it is being used. > Running tcpdump against your traffic during this sort of problem would likely be informative. Hmmm... I wonder if it could be something like this? http://www.benzedrine.cx/ackpri.html although at first glance, the traffic flows would be in the wrong direction to trigger this effect. Cheers, Matthew - -- Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.14 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkv0x5sACgkQ8Mjk52CukIzCBACdGFOr54HVxLPV6XRwK9PFu6KF zhsAnRm4m7sIH9/CeMXKIcopWhubbn2G =DJjY -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4BF4C79B.3070804>