Date: Wed, 7 Aug 2002 23:20:17 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Patrick Thomas <root@utility.clubscholarship.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: need tunings for a loaded freeBSD firewall Message-ID: <20020807222017.GA64024@happy-idiot-talk.infracaninophi> In-Reply-To: <20020807135406.O28830-100000@utility.clubscholarship.com> References: <20020807135406.O28830-100000@utility.clubscholarship.com>
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On Wed, Aug 07, 2002 at 02:03:22PM -0700, Patrick Thomas wrote:
> The firewall has two interfaces and handles about 2megabits/second of
> traffic on average. Recently, for reasons I cannot discern, it is choking
> on traffic. Most ftp transfers run at 5-8 Kb/s (as opposed to 300-500 K)
> and pings with large packet sizes drop a lot of packets.
>
> Small (normal) pings and general interactive response seem to be ok, but
> again, file transfers are horrible, and pings with large sizes drop a lot
> of packets.
That sounds to me like hardware problems. Did you try swapping out
the network cables? Does 'netstat -i' show any appreciable error
counts for your interfaces? Any suspicious entries in
/var/log/messages? If you run 'tcpdump' to monitor the traffic across
an interface, do you see any truncated or malformed packets going
past?
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
Savill Way
Tel: +44 1628 476614 Marlow
Fax: +44 0870 0522645 Bucks., SL7 1TH UK
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