allow established

flant · #1 August 5th, 2012, 21:18

hi2all
I'm only starting with IPFW, but I already have experience with iptables. on my debian server I'm using

Code:

-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

with default INPUT drop policy.
trying to do the same in IPFW:

Code:

ipfw add allow all from me to any
ipfw add allow all from any to me establish

but it works strange. I can establish ftp, or ssh connection from FreeBSD to other host and they can't doing the same to me, but I can't ping internet hosts, and pkg_add -r blablabla also doesn't work.

plamaiziere · #2 August 6th, 2012, 04:50

Quote:

Originally Posted by flant

hi2all
I'm only starting with IPFW, but I already have experience with iptables. On my debian server I'm using

Code:

-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

with default INPUT drop policy.
trying to do the same in ipfw:

Code:

ipfw add allow all from me to any
ipfw add allow all from any to me establish

Don't do this. established (from ipfw(8)): Matches TCP packets that have the RST or ACK bits set. Use states instead, something like (I've not checked the syntax...)

Code:

ipfw add check-state
ipfw add allow all from me to any keep-state

Regards.

flant · #3 August 6th, 2012, 19:13

Thank you very much!
Now I'm bigger, than newbie )))

plamaiziere · #4 August 21st, 2012, 22:00

Quote:

Originally Posted by flant

Thank you very much!
Now I'm bigger, than newbie )))

You are welcome. Well there is no newby (I dislike this term) on FreeBSD, just people learning. I'm learning too...

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