NAT FreeBSD
From Teknologisk videncenter
Contents
FreeBSD NAT
ipnat
/etc/ipnat.rules
# Filename: /etc/ipnat.rules
#172.16.4.0/24 Internal backbone network on Mercantec
map em1 from 192.168.22.0/24 to 172.16.4.0/24 -> 172.16.4.7/32
#172.16.67.0/24 Printers on Mercantec
map em1 from 192.168.22.0/24 to 172.16.67.0/24 -> 172.16.4.7/32
#192.168.128.0/17 TEKKOM classes
map em1 from 192.168.22.0/24 to 192.168.128.0/17 -> 172.16.4.7/32
map vr1 192.168.22.0/24 -> 0/32
map vr1 172.21.0.0/16 -> 0/32
rdr vr1 83.90.239.186/32 -> 192.168.22.221 #sun
rdr vr1 83.90.239.187/32 -> 192.168.22.178 #Cisco
rdr vr1 83.90.239.188/32 -> 192.168.22.223 #bsd
/etc/rc.conf
Add the following to /etc/rc.conf
defaultrouter="83.90.47.29"
static_routes="backbone tekkom printers"
route_tekkom="-net 192.168.128.0/17 172.16.4.1"
route_backbone="-net 172.16.4.0/24 172.16.4.1"
route_printers="-net 172.16.67.0/24 172.16.4.1"Checking ipnat
You can use ipnat -l to see active sessions and filters in use. Use ipnat -lv to see traffic from each session
[root@mars etc]#<input>ipnat -l</input>
List of active MAP/Redirect filters:
map em1 from 192.168.22.0/24 to 172.16.4.0/24 -> 172.16.4.7/32
map em1 from 192.168.22.0/24 to 172.16.67.0/24 -> 172.16.4.7/32
map em1 from 192.168.22.0/24 to 192.168.128.0/17 -> 172.16.4.7/32
map vr1 192.168.22.0/24 -> 0.0.0.0/32
map vr1 172.21.0.0/16 -> 0.0.0.0/32
rdr vr1 83.90.239.186/32 -> 192.168.22.221 ip
rdr vr1 83.90.239.187/32 -> 192.168.22.178 ip
rdr vr1 83.90.239.188/32 -> 192.168.22.223 ip
List of active sessions:
MAP 192.168.22.184 61751 <- -> 83.90.47.30 61751 [172.20.0.1 161]
MAP 192.168.22.186 61750 <- -> 83.90.47.30 61750 [172.20.0.1 161]
MAP 192.168.22.156 61714 <- -> 172.16.4.7 61714 [172.16.4.254 9100]
MAP 192.168.22.122 61745 <- -> 83.90.47.30 61745 [172.20.0.1 161]
MAP 192.168.22.181 61713 <- -> 83.90.47.30 61713 [213.155.157.83 80]
MAP 192.168.22.134 61744 <- -> 83.90.47.30 61744 [208.67.222.222 53]
MAP 192.168.22.134 50740 <- -> 83.90.47.30 50740 [208.67.222.222 53]
MAP 192.168.22.117 60752 <- -> 83.90.47.30 60752 [208.67.222.222 53]
MAP 192.168.22.123 55213 <- -> 83.90.47.30 55213 [172.20.0.1 161]
MAP 192.168.22.184 61709 <- -> 83.90.47.30 61709 [80.208.113.164 443]
MAP 192.168.22.182 55212 <- -> 83.90.47.30 55212 [172.20.0.1 161]
MAP 192.168.22.191 55211 <- -> 83.90.47.30 55211 [172.20.0.1 161]
MAP 192.168.22.197 55210 <- -> 83.90.47.30 55210 [172.20.0.1 161]
MAP 192.168.22.201 55209 <- -> 83.90.47.30 55209 [172.20.0.1 161]
MAP 192.168.22.71 55208 <- -> 83.90.47.30 55208 [172.20.0.1 161]
MAP 192.168.22.184 61703 <- -> 83.90.47.30 61703 [80.208.113.164 443]
MAP 192.168.22.134 55205 <- -> 83.90.47.30 55205 [172.20.0.1 161]
MAP 192.168.22.184 55168 <- -> 83.90.47.30 55168 [172.20.0.1 161]
MAP 192.168.22.184 55167 <- -> 83.90.47.30 55167 [172.20.0.1 161]
MAP 192.168.22.184 55166 <- -> 83.90.47.30 55166 [172.20.0.1 161]
MAP 192.168.22.184 55165 <- -> 83.90.47.30 55165 [172.20.0.1 161]
MAP 192.168.22.184 61653 <- -> 83.90.47.30 61653 [80.208.113.164 443]Source and destination NAT
rdr vr1 83.90.239.187/32 -> 172.16.4.15 # VMware
map em1 from 0/0 to 172.16.4.15 -> 172.16.4.16/32 #VMware- Redirect incomming traffic to NIC vr1 to IP address 83.90.239.187/32 to IP address 172.16.4.15 (Internal server)
- Map traffic from anywhere (0/0) which go to 172.16.4.15 out of NIC em1 using local IP address 172.16.4.16