Date: Wed, 13 Jan 1999 00:53:26 +0000 From: Brian Somers <brian@Awfulhak.org> To: Glen Mann <gmann@cyberia.com> Cc: FreeBSD-questions@FreeBSD.ORG Subject: Re: PPP keepalive filters Message-ID: <199901130053.AAA20425@keep.lan.Awfulhak.org> In-Reply-To: Your message of "Mon, 28 Dec 1998 15:07:20 EST." <3687E4F8.17882976@cyberia.com>
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> Hello-
>
> My ISP drops my connections after a ridiculously short inactivity.
> Apparently the afilters are the way to keep the connection alive,
> however, the documentation does not say what the following do:
>
> #
> # KeepAlive filters
> # Don't keep Alive with ICMP,DNS and RIP packet
> #
> set afilter 0 deny icmp
> set afilter 1 deny udp src eq 53
> set afilter 2 deny udp dst eq 53
> set afilter 3 deny udp src eq 520
> set afilter 4 deny udp dst eq 520
> set afilter 5 permit 0/0 0/0
>
> What actually happens, especially where performance is concerned? Would
> it be better to send a ping packet every few minutes?
It's the only way. As the comment says, an `afilter' prevents the
given packets from keeping the link alive. Nothing in ppp will force
the link to stay active.
> Thanks
> -Glen
--
Brian <brian@Awfulhak.org> <brian@FreeBSD.org> <brian@OpenBSD.org>
<http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour !
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