mjhjmtu

I have a Debian 9.5 server that I'm trying to use as a PBX server with a sip trunk, this machine has two network interfaces, one pointing to LAN another one pointing to my sip provider. This is the configuration:

iface LAN inet static
 address 192.168.1.247/24
 gateway 192.168.1.254
 # dns-* options are implemented by the resolvconf package, if installed
 dns-nameservers 192.168.1.254

allow-hotplug SIP
iface SIP inet static
 address 172.xxx.xxx.xxx
 netmask 255.255.255.252

And a SIP server with IP: 172.xxx.xxx.xxx

What I want to do is route all incoming trafic from my LAN that targets to my SIP server to it.

I was trying adding this to SIP interface

post-up ip route add [MySipServerIP] dev SIP src 192.168.1.0/24 table mgmt

Another try:

post-up ip route add [SIP ip] dev SIP src 192.168.1.0/24 table mgmt

What is the right way to set this route?

Well finally the work is done.

First: Interface LAN was configured by installer itself, then it add mask /24 that must be removed.

iface LAN inet static
 address 192.168.1.247/24
 gateway 192.168.1.254
 # dns-* options are implemented by the resolvconf package, if installed
 dns-nameservers 192.168.1.254 

allow-hotplug SIP
iface SIP inet static
 address 172.xxx.xxx.xxx
 netmask 255.255.255.252

Was modified to:

iface LAN inet static
 address 192.168.1.247
 netmask 255.255.255.0
 gateway 192.168.1.254
 # dns-* options are implemented by the resolvconf package, if installed
 dns-nameservers 192.168.1.254 

allow-hotplug SIP
iface SIP inet static
 address 172.xxx.xxx.IP
 netmask 255.255.255.252

Then at /etc/rc.local must add two static routes

1. 
   

   This route sends all trafic to LAN through LAN interface

   
   
   

   route add 192.168.1.0 gw 192.168.1.254
   

   
   


2. 
   

   This route sends all traffic to my sip server through SIP interface

   
   
   

   route add [SIP SERVR IP] gw 172.xxx.xxx.GW
   

   
   

This all done the work.

Note:

172.xxx.xxx.IP is the Ip assigned by telecom provider

172.xxx.xxx.GW is the gateway assigned by telecom provider

[SIP SERVR IP] is the Sip server ip assigned by telecom provider.