Date: Mon, 3 Jul 2000 02:45:28 -0400 From: "Patrick Bihan-Faou" <patrick@mindstep.com> To: "Karsten Patzwaldt" <karsten@gedankenpolizei.de> Cc: <net@FreeBSD.org> Subject: Re: NAT and PPPoE Message-ID: <051c01bfe4ba$466aaf30$040aa8c0@local.mindstep.com> References: <20000702233552.A862@odysseus.gedankenpolizei.de>
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Hi, > OK, I finally got a DSL connection, and I set up a FreeBSD-router as a > router, using NAT to give access to the Internet for my whole network. > That works so far, I can connect via SSH, POP3 and so on. But FTP and > HTTP make problems. Those two protocols can be used from the router > without any problems, but the other computers on the LAN time out when > trying to connect to any server. They _are_ able to connect to to the > webservers of my provider (the german T-Online), but I don't reach any > other servers. This sounds very much like the problem many people are having with PPPoE setups and Path MTU Discovery not functioning properly on remote web servers. The only thing you can do is reduce the configure MTU on the CLIENT machines on the LAN to something like 1400 bytes. Also, this problem has been discussed on this list quite extensively a couple of weeks ago. There is a small daemon to run on your FreeBSD gateway that will go around the problem. Look for threads called '"frag-anyways" knob' and '[CFV] where to put the TCP MSS correction code'. The daemon is called "tcpmssd" and works like natd. Patrick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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