Bug 123858

Summary: [stf] [patch] stf not usable behind a NAT
Product: Base System Reporter: Lapo Luchini <lapo>
Component: kernAssignee: freebsd-bugs (Nobody) <bugs>
Status: Open ---    
Severity: Affects Only Me CC: lapo
Priority: Normal Keywords: patch
Version: 6.3-PRERELEASE   
Hardware: Any   
OS: Any   
Attachments:
Description Flags
stf.no_addr4check.diff none

Description Lapo Luchini 2008-05-21 13:40:02 UTC 
The stf(4) interface does proper filtering on the incoming 6to4 packets, 
but checking the destination address avoids it to work behind a NAT.

For those of us with a modem/router not capable enough to support IPv6 
but capable to redirect protocol 41 traffic (or maybe just all of it) to 
a NAT-ed FreeBSD box, this patch means easy and working access to IPv6 
world; ok, I'm absent-minded, but I already compiled a kernel forgetting 
to re-apply the patch three times in a row ;-)

Fix: This is ume's patch as in Message-ID: <ygeacqp2y0f.wl%ume@mahoroba.org>, 
applied on latest 6-STABLE.

Has been working perfectly for me in the past year and some more 
(tracking 6-STABLE on both i386 and amd64).
How-To-Repeat: 
ping6(8) some IPv6 website, watch the ping packets go (and correctly 
reach destination) and never see the answer.
Comment 1 Volker Werth freebsd_committer freebsd_triage 2008-10-06 22:33:23 UTC 
Responsible Changed
From-To: freebsd-bugs->freebsd-net


Over to maintainer(s).
Comment 2 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 07:58:36 UTC 
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

Mail being skipped
Comment 3 Graham Perrin freebsd_committer freebsd_triage 2022-10-17 12:40:37 UTC 
Keyword: 

    patch
or  patch-ready

– in lieu of summary line prefix: 

    [patch]

* bulk change for the keyword
* summary lines may be edited manually (not in bulk). 

Keyword descriptions and search interface: 

    <https://bugs.freebsd.org/bugzilla/describekeywords.cgi>