Looks like I'm missing a syntax for the ipfw NAT rule. I would appreciate if someone familiar with ipfw can help with this.
I'm setting up ipfw NAT for one-to-one translation within a lab environment. Simply put, I need the source IP originating from the (external) client to change to an internal IP, which should get forwarded to an internal server.
That is, something like:
External client -> ipfw/NAT (freebsd FreeBSD 8.4/amd64) -> HTTP server
(50.1.2.3 -> 50.1.2.6 <ipfw/NAT mapping> 3.0.21.7 -> 3.0.21.6)
I have the following configurations in place and the NAT rule appears to have loaded (as can be seen below) but I don't see the IP translation taking place:
I have built a custom kernel with the following options:
/etc/rc.conf has the following:
and the relevant rules in /usr/local/etc/ipfw.rules:
(3.0.21.7 is the internal IP. 50.1.2.6 is the external client).
And /etc/natd.conf
And finally, it appears ipfw has enabled the rule:
So the daemon is running.
Finally,
What am I missing?
I'm setting up ipfw NAT for one-to-one translation within a lab environment. Simply put, I need the source IP originating from the (external) client to change to an internal IP, which should get forwarded to an internal server.
That is, something like:
External client -> ipfw/NAT (
(50.1.2.3 -> 50.1.2.6 <ipfw/NAT mapping> 3.0.21.7 -> 3.0.21.6)
I have the following configurations in place and the NAT rule appears to have loaded (as can be seen below) but I don't see the IP translation taking place:
I have built a custom kernel with the following options:
Code:
options IPFIREWALL
options IPFIREWALL_NAT
options IPFIREWALL_FORWARD
options IPFIREWALL_VERBOSE
options IPFIREWALL_DEFAULT_TO_ACCEPT
options IPDIVERT
options IPFILTER
options IPFILTER_LOG
options LIBALIAS
options DUMMYNET/etc/rc.conf has the following:
Code:
sshd_enable="YES"
gateway_enable="YES"
firewall_enable="YES"
firewall_script="/usr/local/etc/ipfw.rules"
firewall_logging="YES"
firewall_type="open"
natd_enable="YES"
natd_interface="em1"
natd_flags="-f /etc/natd.conf"
Code:
ipfw add 500 nat 1 all from any to any via em1
ipfw nat 1 config redirect_addr 3.0.21.7 50.1.2.6(3.0.21.7 is the internal IP. 50.1.2.6 is the external client).
And /etc/natd.conf
Code:
# NATd options
use_sockets
same_ports
interface em1
redirect_address 3.0.21.7 50.1.2.6And finally, it appears ipfw has enabled the rule:
Code:
# /etc/rc.d/ipfw start
00500 nat 1 ip from any to any via em1
ipfw nat 1 config redirect_addr 3.0.21.7 50.1.2.6
Firewall rules loaded.
Firewall logging enabled.
Starting natd.
#
Code:
# ps auxwww|grep nat
root 2362 0.0 0.2 14132 1628 ?? Is 7:04AM 0:00.00 /sbin/natd -f /etc/natd.conf -n em1
#So the daemon is running.
Finally,
Code:
# uname -mrs
FreeBSD 8.4-RELEASE amd64
#What am I missing?