Date: Wed, 20 Aug 2008 13:51:39 -0700 From: Javier Ubillos <jav@sics.se> To: freebsd-net@freebsd.org Subject: Override default ICMP (and other protocols) default replies. Message-ID: <1219265499.9118.31.camel@dib>
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--=-Lk5DLZuQh2dVjVpmdkUu Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Hi freebsd-net. (Sorry for cross posting. This time I think I found the right forum for my question) I'm implementing a NAT (1 ip - 1 ip) like router. (it's not actually NAT, but it's a good analogy for this case). I have chosen to use pcaplib to pick up the packets. I have an implementation which picks up the packets, inspects them, rewrites the destination/source ip-addresses and sends them out on the repective interface. The problem I'm facing however is that my interfaces are answering to e.g. icmp-echo (ping) automatically, and I don't know how to turn this behaviour off. What I want to happen is that if A pings C, my router B in between should simply forward the packets w/o any automatic reactions. A --> B --> C So that if e.g. C is down, no echo-reply is sent back (or if C is up, that C is actually sending the echo-reply. Does any one know how to turn off the automatic replies (ICMP and whatever else I haven't forseen yet) or does any one know where I can find out more about the issue? Thank you // Javier --=-Lk5DLZuQh2dVjVpmdkUu Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBIrIPbGBo5FLRz4goRAl4HAJ9PE8pZbl201UJw8DE00JZ+mJOtJgCeOVkX kcrQdGjvN+iw1ZLkoaNLJOg= =rB0J -----END PGP SIGNATURE----- --=-Lk5DLZuQh2dVjVpmdkUu--
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