Red Hat Bugzilla – Bug 472762
Shorewall doesn't load saved state correctly on startup.
Last modified: 2009-07-14 10:17:29 EDT
Description of problem:
I installed shorewall-4.0.14-2.fc9.noarch and set-up a basic 2-interface firewall with it. In order to save time on startup, I put the line "OPTIONS=-f" in /etc/sysconfig/shorewall so shorewall will load pre-compiled rules previously saved by "shorewall save". After I updated my Kernel to kernel-126.96.36.199-50.fc9.i686 (a Koji build, not from update repo), shorewall seems to be unable to load the saved state on startup. Previously I opened a bunch of ports on my interfaces but they are not honored. Instead, all ports are closed. This appears after every reboot even if I manually compile and save the rules again.
I don't know whether it's indeed a shorewall or kernel problem. However, I can't see anything suspicious in dmesg or /var/log/messages. There's an upstream update available (shorewall 4.2) but I don't know whether this fixes the problem.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Save state by "shorewall save"
Opened ports are not remembered. All ports are closed.
Ports specified in /etc/shorewall/rules should have been opened.
A workaround is, of course, compile shorewall rules every time after bootup. That pretty defeats the purpose of using the saved state.
A quick update:
It seems this bug is not always reproducible. I just now rebooted the machine and all things went well so far. I'll report back when more info is available.
Hm. I just tried /sbin/shorewall save on an F-9 machine, and SElinux actually prevents the save file from being created (which is itself a bug that needs fixing). If you have SElinux in enforcing mode, I expect you're not actually creating the save file. So, can you confirm that the save file actually exists and has content as a first step.
Regarding shorewal 4.2.x - I don't plan to upgrade F-9 to the 4.2 releases, as it is incompatible with the 4.0.x release config files in several ways, so upgrading may break people's working set ups. 4.2.x is available in F-10 though.
As an aside, note that starting the firewall using -f isn't actually noticably faster than recompiling the rule set if you use the perl compiler. It is faster than the legacy shell compiler though.
(In reply to comment #2)
> Hm. I just tried /sbin/shorewall save on an F-9 machine, and SElinux actually
> prevents the save file from being created (which is itself a bug that needs
> fixing). If you have SElinux in enforcing mode, I expect you're not actually
> creating the save file. So, can you confirm that the save file actually exists
> and has content as a first step.
> Regarding shorewal 4.2.x - I don't plan to upgrade F-9 to the 4.2 releases, as
> it is incompatible with the 4.0.x release config files in several ways, so
> upgrading may break people's working set ups. 4.2.x is available in F-10
I have experienced the same SELinux denial before so I changed the offending file's (/var/lib/shorewall/save) SELinux context type to "iptables_t" and there were no further access denials.
Also, at the time the bug was triggered, SELinux was in permissive mode...
OK, but did /var/lib/shorewall/save and /var/lib/shorewall/restore actually contain content after you'd executed shorewall save? Knowing that will help us work out if the problem is at save or restore time.
Created attachment 324686 [details]
Created attachment 324687 [details]
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