Date: Sat, 02 Feb 2002 20:32:49 +0100 From: "Rogier R. Mulhuijzen" <drwilco@drwilco.net> To: Shaun Jurrens <shaun@shamz.net>, freebsd-net@FreeBSD.ORG Cc: Alexey Luckyanchikov <alexl@alkar.net> Subject: Re: Weird path MTU autodiscovery problem in 4.5-RELEASE Message-ID: <5.1.0.14.0.20020202202155.01b9e390@mail.drwilco.net> In-Reply-To: <20020202191943.B65253@atreides.freenix.no>
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>#>Server have not any filters. ipfw support is compiled in, but first rule
>#>is 'allow ip from any to any' and dump which you can see below was made
>#>on server.
>
> yeah, but icmp is it's own protocol, so you're probably filtering it
>and bpf will see it because it sees what comes in on the interface before
>ipfw processes it. ICMP isn't allowed by default in ipfw. I'd suggest you
>unload the module, if possible and see if it works correctly then.
ICMP is an IP protocol, if the very first rule in IPFW is 'allow ip from
any to any' then ICMP is allowed.
Doc
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