Date: Wed, 21 Oct 1998 14:36:51 +0100 From: "Nick A. Fikouras" <nick@dcs.shef.ac.uk> To: "freebsd-questions@FreeBSD.ORG" <freebsd-questions@FreeBSD.ORG> Subject: 40 octet IP header? Message-ID: <362DE373.4A79CFC2@dcs.shef.ac.uk>
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In several tcp connections performed between two freebsd-2.2.2 machines connected with an Ethernet link (mtu 1500 octets), I observed with tcpdump that the data field takes up only 1440 octets of the whole IP packet. Assuming that the tcp header is 20 octets long, this leaves us with a 40 octet IP header. Obviously, by default the system requires some options in the IP header (i.e. timestamp). How can I configure this default options, even turn them off? thank you in advance, --nick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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