Update Firewall Rules
keramida at linux.gr
Thu May 22 11:31:34 PDT 2003
Philip Payne wrote:
>>Thanks to all who replied, lots of food for thought!
>>Maybe my setup is a little different than what people use
>>because I have different rule sets in /etc/rc.firewall
>>(which is the default with OPEN, SIMPLE and CLIENT)
>>Good advice against lock-outs though. Is generally the
>>preferred approach to use different files for different
>>rules, rather than keep sets in /etc/rc.firewall?
I usually keep a bunch of ipfw rulesets around in files
named /etc/ipfw.xxxx or /etc/ipf.yyyy and then set my
firewall_type="" (or ipfilter_rules="" to the full path
(it *is* important to use the full path, at least for
ipfw rulesets) when switching among them:
# ipfw -q /etc/ipfw.open
# ipfw -q /etc/ipfw.paranoid
>>And if so, how do you set this up in /etc/rc.conf, since
>>the firewall type by default looks at rc.firewall...
There is a post I made in -questions a while ago that explains
all this in a bit of detail. Look at the archives, please..
Right now my ISP is having serious problems and I can't reach
google.com at all, but look at groups.google.com for something
author:keramidas & group:*freebsd* & ipfw & firewall_type
and you shouldn't have trouble spotting the correct post.
> Using the same approach as writing a script to carry out the
> sh /etc/rc.firewall command.
> You could either have different scripts to pass the
> firewall_type variable and then do the firewall rules e.g.:
> sh /etc/rc.firewall
Nope, that will probably not work...
Capitalization does matter. It's firewall_type in all lowercase.
Not FIREWALL_TYPE. But then, even if you get the capitalization
right, rc.firewall will load rc.conf and override this value from
the environment the script runs.
> I'm really not a shell scripting person (networking is my area),
> so I can't say this will definitely work but... kind of sounds
> right. Perhaps someone with more shell scripting experise can
It'll work fine if rc.conf doesn't override firewall_type :-)
> Let me know how you get on. Wouldn't mind knowing for sure what's the
> correct approach.
I tried to outline all possible ways of loading rules with the
rc.firewall script, without it, manually or whatever in the post
mentioned above. Just search the archives. I can't help you with
the searching ATM :-/
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