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Bug 229879 - spew on startup of ip6tables
Summary: spew on startup of ip6tables
Alias: None
Product: Fedora
Classification: Fedora
Component: system-config-firewall
Version: rawhide
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Thomas Woerner
QA Contact: Fedora Extras Quality Assurance
: 230019 (view as bug list)
Depends On:
TreeView+ depends on / blocked
Reported: 2007-02-23 22:52 UTC by Dave Jones
Modified: 2015-01-04 22:29 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-10-01 13:57:40 UTC

Attachments (Terms of Use)

Description Dave Jones 2007-02-23 22:52:26 UTC
with a fresh install of todays rawhide I see this when ip6tables starts up..

Warning: never matched p[  OK  ] 51. use exension match instead

Comment 1 Peter Bieringer 2007-06-18 19:08:33 UTC
Don't worry, be happy that ip6tables is at least starting ;-) 
See and for more

Comment 2 Peter Bieringer 2007-06-20 21:18:10 UTC
There are more issues

1) message is caused by:

# ip6tables -A RH-Firewall-1-INPUT -p 51 -j ACCEPT
Warning: never matched protocol: 51. use exension match instead.[root@host

Note that there is a linefeed also missing

2) Looks like there is a need of a discussion with netfilter folks, why they
mean, that in IPv6 an Authentication Header can never be occur as first
transport header behind the IPv6 header

3) If one try to setup a rule using IPv6 header matching (according to the
netfilter warning message), this would fail because of missing library:

# ip6tables -A RH-Firewall-1-INPUT --match ipv6header --header 51 -j ACCEPT
ip6tables v1.3.7: Couldn't load match
`ipv6header':/lib/iptables/ cannot open shared object
file: No such file or directory

Try `ip6tables -h' or 'ip6tables --help' for more information.

Note that the kernel would support this:
# modprobe ip6t_ipv6header
# cat /proc/net/ip6_tables_matches 

This missing userspace support is already known for




I really wonder why this bug can't be fixed since August 2005.

Comment 3 Thomas Woerner 2007-08-23 12:21:14 UTC
*** Bug 230019 has been marked as a duplicate of this bug. ***

Comment 4 Thomas Woerner 2007-09-26 15:43:26 UTC
Assigning to system-config-firewall.

Comment 5 Thomas Woerner 2007-10-01 13:57:40 UTC
Fixed in rawhide in package system-config-firewall-1.0.8-1 or newer.

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