Red Hat Bugzilla – Bug 834610
fails to generate valid iptable rule for ssh
Last modified: 2013-08-01 08:52:08 EDT
Description of problem: system-config-firewall fails to create a valid entry for a basic system where only ssh connections are allowed. The net result is a system which can not be reached at all, even if intended to. The only solution is to disable completelly the firewall.
This can be verified by running "iptables -nL". With the firewall enabled, the default behaviour for the INPUT chain is DENY.
Version-Release number of selected component (if applicable): Fedora first installed from XFCE live disk and updated. Got this problem on XFCE 16 i686; XFCE 16 X86_64 and XFCE 17 X86_64
How reproducible: always
Steps to Reproduce:
1. fire system-config-firewall, enable firewall; enable service ssh
2. click on apply
iptables -nL => nothing about ssh
Chain INPUT (policy ACCEPT)
ACCEPT tcp ... STATE:new dpt: 22
REJECT all ... (fallback rule, default behaviour)
Additional info: The correct result comes from a system installed from a LDXE 17 X86_64 live CD and updated
(In reply to comment #0)
> Actual results:
> iptables -nL => nothing about ssh
What about 'iptables -L' ?
I think this is the same bug but I'm seeing it on x86_64.
iptables -L shows that no rule has been added to allow ssh even though it has been enabled via system-config-firewall.
I think that what is happening is that system-config-firewall is only adding a rule for ipv6 connections. ip6tables -L shows the ssh rule correctly enabled. Unfortunately, my network does not support ipv6 so the machine is entirely unreachable.
Could you check the output of ip6tables -L to see if the same thing is happening on your platform?
Note: the settings for ipv4 and ipv6 in service options are identical (and default).
I'm wondering if disabling ipv6 would result in a iptables rule being added instead. I need to disable ipv6 anyway...
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