Date: Mon, 12 Jul 2010 11:11:26 +0100 From: Michael <mlmichael70@gmail.com> To: freebsd-ipfw@freebsd.org Subject: please help with NATing my jails Message-ID: <4C3AEA4E.50005@gmail.com>
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Hello.
Does anybody has a working configuration with ipfw nated jails on
loopback interface?
It simply doesn't work on my system. I can not get any connections to
outside world from within a jail.
FreeBSD 8.0-p3 amd64 laptop connected to internet via wlan0 (ath0) with
192.168.1.111 address obtained with DHCP.
Jail with IP 127.127.127.1 aliased on lo0.
Host system configuration:
/etc/rc.conf
ifconfig_wlan0="WPA DHCP"
ifconfig_lo0_alias0="inet 127.127.127.1 netmask 255.255.255.255"
gateway_enable="YES"
firewall_enable="YES"
firewall_script="/etc/ipfw.rules"
firewall_nat_enable="YES"
firewall_nat_interface="wlan0"
/etc/resolve.conf
nameserver 208.67.222.222
nameserver 208.67.220.220
/etc/ipfw.conf
ipfw -q -f flush
ipfw add 10 allow all from 127.0.0.1 to 127.0.0.1 via lo0
ipfw add 20 check-state
ipfw add 30 nat 100 ip from 127.127.127.1 to any via wlan0 keep-state
ipfw nat 100 config ip 192.168.1.111 log
ipfw add 40 allow all from any to any
Jailed system configuration:
/etc/rc.conf
network_interfaces=""
/etc/resolve.conf
nameserver 208.67.222.222
nameserver 208.67.220.220
Now I'm doing ssh into a jailed system (127.127.127.1). Then on the jail
system I'm trying to do for example:
host freebsd.org
;; connection timed out; no servers could be reached
After that on the host system I can get some more information:
ipfw -d show
00010 0 0 allow ip from 127.0.0.1 to 127.0.0.1 via lo0
00020 0 0 check-state
00030 4 204 nat 100 ip from 127.127.127.1 to any via wlan0 keep-state
00040 204 26764 allow ip from any to any
65535 0 0 deny ip from any to any
## Dynamic rules (2):
00030 1 51 (5s) STATE udp 127.127.127.1 19333 <-> 208.67.220.220 53
00030 1 51 (4s) STATE udp 127.127.127.1 37497 <-> 208.67.222.222 53
ipfw nat show
nat 100: icmp=0, udp=4, tcp=0, sctp=0, pptp=0, proto=0, frag_id=0
frag_ptr=0 / tot=4
So no packets got blocked but still it doesn't work properly. I'm
struggling with this for couple weeks now and I'm afraid I just run out
of ideas so any help would be very appreciated.
The same jail works fine with pf so I believe it's a problem with my
ipfw rules.
Michael
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