Re: Re: ipip-tunnel specifications : where ?

From: Mike Murphree (eghzyvus@nycboe.org)
Date: Mon Sep 18 2000 - 16:40:50 EEST

  • Next message: Richard Adams: "Re: IP-IP Tunnel"

    What ports does this service use? I need to make
    allowances for it in my firewall. Also does anyone
    have any experience with using the FreeBSD 'nos-tun'
    function with the Linux equivalent?

    Thanks,
    Mike N4CNW

    > For RFC search :
    > http://www.rfc-editor.org/cgi-bin/rfcsearch.pl
    >
    > Steve Meuse a écrit :
    > >
    > > At 07:12 PM 09/11/2000 +0200, Cees Tool wrote:
    > > >Hi,
    > > >
    > > >I am trying to find the RFC or other document where the IPIP tunnel protocol
    > > >is described. I like to see how the frames look like.
    > > >I did not have any luck searching on the internet yet, but maybe someone has
    > > >a URL of RFC number for me ??
    > > >
    > > >73
    > > >Cees - PA3AES
    > >
    > > Just a quick search returned the following:
    > >
    > > 1853 IP in IP Tunneling. W. Simpson. October 1995. (Format: TXT=14803
    > > bytes) (Status: INFORMATIONAL)
    > >
    > > 1. Introduction
    > >
    > > The IP in IP encapsulation Protocol/Payload number 4 [RFC-1700] has
    > > long been used to bridge portions of the Internet which have disjoint
    > > capabilities or policies. This document describes implementation
    > > techniques used for many years by the Amateur Packet Radio network
    > > for joining a large mobile network, and also by early implementations
    > > of IP Security protocols.
    > >
    > > Use of IP in IP encapsulation differs from later tunneling techniques
    > > (for example, protocol numbers 98 [RFC-1241], 94 [IDM91a], 53
    > > [swIPe], and 47 [RFC-1701]) in that it does not insert its own
    > > special glue header between IP headers. Instead, the original
    > > unadorned IP Header is retained, and simply wrapped in another
    > > standard IP header.
    > >
    > > This information applies principally to encapsulation of IP version
    > > 4. Other IP versions will be described in separate documents.
    > >
    > > -Steve

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