From mboxrd@z Thu Jan 1 00:00:00 1970 From: Linus =?utf-8?Q?L=C3=BCssing?= Subject: Altering MTU in ICMPv6 packet too big message Date: Wed, 24 Feb 2010 00:42:28 +0100 Message-ID: <20100223234228.GA3521@Linus-Debian> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="k1lZvvs/B4yU6o8G" Return-path: Content-Disposition: inline Sender: netfilter-owner@vger.kernel.org List-ID: To: netfilter@vger.kernel.org --k1lZvvs/B4yU6o8G Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Hi there, we're having a buggy, closed source IPv6 router here, which keeps announcing a wrong MTU via ICMPv6 packet too big messages. Is there a way to modify the 1500 to a 1480 with a rule in the mangle table on the host that receives those broken messages? I think despite this one value, also the checksum would have to be recalculated. Cheers, Linus PS: the tcpmss-target extension is not enough, as I'm still having trouble with UDP packets. --k1lZvvs/B4yU6o8G Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQIcBAEBAgAGBQJLhGfjAAoJEBKw7u43QNpfoPUQAJGgkSN7BmWJpe2JiYCUeBzM yAs7kZ7YeDxAIAlejPh27ZYloA8ml4DCVUYOruTJBMQyP9CYz5Fa02pXSZarKKnf kfHor24QcxoQAqBW2e/U9Cg6ZHb9zJBSMOW2kEQE7NhiWTWaessmztcgxjsZU/W4 OoCY5R5vlf3tSGbAINldUGxYXQMHzMVO10hByqsqmVCvlwZWmMg/bjIXnNHh7+bZ 8Aaw70iGdrJcRIedw2WjXSrIjGq2cKwFje/APryQpvaYfl3YxD/4s+VC79L68wrS UJKPT0nqCxWFcfqcCtPk8hyzJlu4BHYvz8jnWd8Lnsf1iULFwlaBqE6O9W5CxUZ7 rPBdxuUxRvIE4U9abOPH4IM5O09rxT0jjFAoeuaFYAyaoY1JLFypKjddxNv2BGIp 1h8ydPzbkIm4I9gi1gnAL6Op4RIfbI1rDTD8eRAeeDRJeUwEW1Ytx0goxlDgdEGQ 5lYZiVtn5MffK48bCJHxzfrqdaT+H35cQP+ZsfNGO96/iLx8UWOcqUTOL0i3erQM vmxQ9QWUE2eQ3CwHSTXgyo+9oMwtNo0ctK/97ZfD6QQDSuhyicq9zPLBzhe64QOk L6I5qYR91QSXF9esgCKu5igtJ4tSUvfl3IR8/LIOoSxLPnVtdprg53YfH0+SRGA0 pxyBDvDXEjzTV+XpV4uT =wIH2 -----END PGP SIGNATURE----- --k1lZvvs/B4yU6o8G--