# Is it possible, Allen-Bradley SLC communication via router **URL:** \ **Category:** Ignition\ **Created:** [December 14, 2023, 9:28am UTC](https://forum.inductiveautomation.com/t/is-it-possible-allen-bradley-slc-communication-via-router/83132 "2023-12-14T09:28:53Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Jonas\_Klingberg](https://avatars.discourse-cdn.com/v4/letter/j/db5fbb/32.png) [@Jonas\_Klingberg](https://forum.inductiveautomation.com/u/Jonas_Klingberg)\ **Post date:** [December 14, 2023, 9:28am UTC](https://forum.inductiveautomation.com/t/is-it-possible-allen-bradley-slc-communication-via-router/83132/1 "2023-12-14T09:28:53Z")
Hello, i don´t manage this to work, i want to use another port, then the default 2222 to communicate with a SLC plc, via etherenet, and i have 3 plc on the LAN side, and want to use, for example 10001 port for the 1, and 10002 for the 2 and so on, i try to put the port forwarded port after the IP, so 172.16.1.20:10001, and then port forward it to 2222 on the lan side. but i dont get it to work, any idea? ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/3/9/39ade058bac4e6738d71ab5f5d0dfd916095cb16.png) ---
**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\ **Post date:** [December 14, 2023, 9:43am UTC](https://forum.inductiveautomation.com/t/is-it-possible-allen-bradley-slc-communication-via-router/83132/3 "2023-12-14T09:43:04Z")
1. Check the `ping` response from the gateway and from somewhere else. 2. Check the gateway firewall allows outbound traffic on those ports. 3. Use something like [Advanced Port Scanner](https://www.advanced-port-scanner.com/) to test. ---
**Author:** ![Jonas\_Klingberg](https://avatars.discourse-cdn.com/v4/letter/j/db5fbb/32.png) [@Jonas\_Klingberg](https://forum.inductiveautomation.com/u/Jonas_Klingberg)\ **Post date:** [December 14, 2023, 12:49pm UTC](https://forum.inductiveautomation.com/t/is-it-possible-allen-bradley-slc-communication-via-router/83132/4 "2023-12-14T12:49:38Z")
Hello. I can route the traffic, if i only using the ip adress 172.16.1.20 and make a prot forwarding for port 2222 towards the PLC. The issue is when i added the port number after the ip, 172.16.1.20:10001 , and change the forward port to 10001 to be 2222 on lan side.... so i think the driver in ignition don´t get the port number, or i have type the port wrong, or it´s not possible, to use same router, for serveral PLC behind a router... ---
**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\ **Post date:** [December 14, 2023, 1:00pm UTC](https://forum.inductiveautomation.com/t/is-it-possible-allen-bradley-slc-communication-via-router/83132/5 "2023-12-14T13:00:13Z")
That's what you said in the first post. You didn't reply to my points 2 and 3. ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [December 14, 2023, 1:40pm UTC](https://forum.inductiveautomation.com/t/is-it-possible-allen-bradley-slc-communication-via-router/83132/6 "2023-12-14T13:40:03Z")
> [@Jonas\_Klingberg](#): > > so i think the driver in ignition don´t get the port number, Yes, pretty sure this is the case. You might need to make a feature request. (But don't hold your breath waiting--this is ancient, unloved, barely used stuff now-a-days.) ---
**Author:** ![bschroeder](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bschroeder/32/13260_2.png) [@bschroeder](https://forum.inductiveautomation.com/u/bschroeder)\ **Post date:** [December 14, 2023, 1:41pm UTC](https://forum.inductiveautomation.com/t/is-it-possible-allen-bradley-slc-communication-via-router/83132/7 "2023-12-14T13:41:18Z")
Can you change from port forwarding to a NAT type routing for the different PLCs?