# Ignition UA connectivity between VM's **URL:** \ **Category:** General Discussion\ **Created:** [May 23, 2020, 5:28am UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991 "2020-05-23T05:28:54Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![SaravanaKumar.S2](https://avatars.discourse-cdn.com/v4/letter/s/8edcca/32.png) [@SaravanaKumar.S2](https://forum.inductiveautomation.com/u/SaravanaKumar.S2)\ **Post date:** [May 23, 2020, 5:28am UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991/1 "2020-05-23T05:28:54Z")
Dear Folks, I have a requirement to test OPC-UA connectivity between 2 VM’s created using virtualBox. I have done the following 1. Created 2 VM’s with windows 8.1 64bit OS 2. Created NAT network between VM’s 3. I have tested network connectivity between VM’s by pinging the respective IP address and I got response. 4. In one of the VM I tried to configure OPC-UA client to connect to other VM’s OPC-UA server. I configured following Endpoint URL: opc.tcp://192.168.10.5:62541/discovery. I got following error message: **When using 62541 port I have this error: UaException:status=Bad\_Timeout,message=io.netty.channel.connectTimeoutException: Connection timed out:/192.168.10.5:62541** **When using 8088 port I have this error:** **UaException:status=Bad\_Timeout,message=timed out waiting for acknowledge** I have tried other ports like 8088/4096 Is it a network issue or something else? Thanks & Regards, Saravanan. ---
**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\ **Post date:** [May 23, 2020, 10:34am UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991/2 "2020-05-23T10:34:21Z")
Tried temp disabling firewalls? ---
**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:** [May 23, 2020, 12:06pm UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991/3 "2020-05-23T12:06:21Z")
I haven’t used virtualbox in quite a while, but I recall that the default NAT network type restricted VM-to-VM communications. ---
**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:** [May 23, 2020, 1:00pm UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991/4 "2020-05-23T13:00:20Z")
Ignition’s OPC UA server binds to localhost by default. Did you change the bind address on the gateway that will receive the connection to 0.0.0.0 and restart? ---
**Author:** ![SaravanaKumar.S2](https://avatars.discourse-cdn.com/v4/letter/s/8edcca/32.png) [@SaravanaKumar.S2](https://forum.inductiveautomation.com/u/SaravanaKumar.S2)\ **Post date:** [May 25, 2020, 5:22am UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991/5 "2020-05-25T05:22:05Z")
I have tried but of no use still in trouble. ---
**Author:** ![SaravanaKumar.S2](https://avatars.discourse-cdn.com/v4/letter/s/8edcca/32.png) [@SaravanaKumar.S2](https://forum.inductiveautomation.com/u/SaravanaKumar.S2)\ **Post date:** [May 25, 2020, 5:22am UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991/6 "2020-05-25T05:22:37Z")
But I am able to ping the VM’s ---
**Author:** ![SaravanaKumar.S2](https://avatars.discourse-cdn.com/v4/letter/s/8edcca/32.png) [@SaravanaKumar.S2](https://forum.inductiveautomation.com/u/SaravanaKumar.S2)\ **Post date:** [May 25, 2020, 5:24am UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991/7 "2020-05-25T05:24:09Z")
Hi Kevin, Thankyou for the answer, should I change the binding IP address on OPC-UA server side? Which Address I shall put there? ---
**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:** [May 25, 2020, 1:00pm UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991/8 "2020-05-25T13:00:11Z")
Yes, on the gateway that will receive the connection under `Config > OPC UA > Server Settings` set the Bind Address to 0.0.0.0 and restart. ---
**Author:** ![SaravanaKumar.S2](https://avatars.discourse-cdn.com/v4/letter/s/8edcca/32.png) [@SaravanaKumar.S2](https://forum.inductiveautomation.com/u/SaravanaKumar.S2)\ **Post date:** [May 26, 2020, 6:22am UTC](https://forum.inductiveautomation.com/t/ignition-ua-connectivity-between-vms/34991/9 "2020-05-26T06:22:30Z")
Thanks a lot Kevin, It worked… 🙂