# V8.1.45 Connection issues to Rockwell PLCs **URL:** \ **Category:** Ignition\ **Created:** [February 13, 2025, 5:14pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325 "2025-02-13T17:14:00Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Curlyandshemp](https://avatars.discourse-cdn.com/v4/letter/c/bcef8e/32.png) [@Curlyandshemp](https://forum.inductiveautomation.com/u/Curlyandshemp)\ **Post date:** [February 13, 2025, 5:14pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/1 "2025-02-13T17:14:00Z")
Having an issue with an Ignition upgrade. Migrating from V7.9 to V8.1 on a new server. The new server is on 192.168.3.XXX subnet and PLCs are on 192.168.10.XXX subnet. I can ping PLCs from Ignition Gateway, using Test-Connection -port 44818 from Windows PowerShell confirms port is open. Original gateway was on the 192.168.10.XXX subnet and I just backed up and restored on the new Gateway . The PLC drivers will not connect to any of the CompactLogix PLCs , all V24 or higher firmware. Am I missing something in new Gateway ? ---
**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:** [February 13, 2025, 5:26pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/2 "2025-02-13T17:26:01Z")
Run wireshark on your gateway, filtering for one of the broken target IP addresses. Share it here. (I'll bet the port really isn't open.) ---
**Author:** ![michael.flagler](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/michael.flagler/32/26272_2.png) [@michael.flagler](https://forum.inductiveautomation.com/u/michael.flagler)\ **Post date:** [February 13, 2025, 6:17pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/3 "2025-02-13T18:17:01Z")
Are you sure you have a default gateway/route set in both the PLC and the Ignition gateway pointing to the router that's able to route between the 2 networks? Many times I've seen the gateway get missed on the PLC side causing issues like this. ---
**Author:** ![Curlyandshemp](https://avatars.discourse-cdn.com/v4/letter/c/bcef8e/32.png) [@Curlyandshemp](https://forum.inductiveautomation.com/u/Curlyandshemp)\ **Post date:** [February 13, 2025, 6:24pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/4 "2025-02-13T18:24:13Z")
Need to wait on the customer's IT guy. No permissions to install Wireshark ---
**Author:** ![Curlyandshemp](https://avatars.discourse-cdn.com/v4/letter/c/bcef8e/32.png) [@Curlyandshemp](https://forum.inductiveautomation.com/u/Curlyandshemp)\ **Post date:** [February 13, 2025, 6:25pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/5 "2025-02-13T18:25:43Z")
Thanks. need to wait for customer's IT guy. BUT, i can ping the PLCs on the 192.168.10.XXX subnet and use Web Browser to connect to PLCs , both from the Ignition Gateway on the 192.168.3.XXX subnet ---
**Author:** ![michael.flagler](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/michael.flagler/32/26272_2.png) [@michael.flagler](https://forum.inductiveautomation.com/u/michael.flagler)\ **Post date:** [February 13, 2025, 6:31pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/6 "2025-02-13T18:31:03Z")
Yeah, I'd wait on the IT guy (any chance his name is Larry or Moe? LOL) and see if they're blocking anything in relation to port 44818. Edit: And maybe share your config on here to see how you've configured those drivers. (You are using the new Logix drivers right and not the older ones?) ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 13, 2025, 6:31pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/7 "2025-02-13T18:31:04Z")
Set the loggers under "drivers.LogixDriver" to DEBUG or TRACE and then edit/save one of the devices. Post the logs after something useful looks like it has appeared. ---
**Author:** ![Curlyandshemp](https://avatars.discourse-cdn.com/v4/letter/c/bcef8e/32.png) [@Curlyandshemp](https://forum.inductiveautomation.com/u/Curlyandshemp)\ **Post date:** [February 13, 2025, 8:51pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/8 "2025-02-13T20:51:04Z")
Note sure if any useful info in this. I uninstalled Ignition, reinstalled and did not import project. Created only one device connection to 192.168.10.40, same results, not connecting Issue has to be 'something' blocking port 44818 ( perhaps at managed switch ) as I can ping , but cannot connect to PLC via web browser ( contradicting what I stated earlier ) I can connect to PLC via my VPN connection with web browser. ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/9/7961a253455960e5f93faaf73653259e594333b1.png) ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 13, 2025, 8:52pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/9 "2025-02-13T20:52:56Z")
Yeah, just wanted to confirm it's some kind of network problem and not an unexpected driver bug or something. It does looks like a network problem, not something you can configure your way out of in Ignition. ---
**Author:** ![Curlyandshemp](https://avatars.discourse-cdn.com/v4/letter/c/bcef8e/32.png) [@Curlyandshemp](https://forum.inductiveautomation.com/u/Curlyandshemp)\ **Post date:** [February 13, 2025, 11:15pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/10 "2025-02-13T23:15:26Z")
This is what I get, also ran PING to PLC ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/8/08561df6c54719d25ae2ba2c541b07f2a833550a.png) ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [February 13, 2025, 11:27pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/11 "2025-02-13T23:27:25Z")
That's exactly what I'd expect to see alongside the error message above. Ignition tries to open a TCP connection (SYN) -- no response. ---
**Author:** ![Curlyandshemp](https://avatars.discourse-cdn.com/v4/letter/c/bcef8e/32.png) [@Curlyandshemp](https://forum.inductiveautomation.com/u/Curlyandshemp)\ **Post date:** [February 19, 2025, 10:25pm UTC](https://forum.inductiveautomation.com/t/v8-1-45-connection-issues-to-rockwell-plcs/102325/12 "2025-02-19T22:25:00Z")
as suspected, ports were being block at the host machine, not the VMs