# Host unreachable **URL:** \ **Category:** Ignition\ **Created:** [January 15, 2021, 7:09pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316 "2021-01-15T19:09:19Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![drinaldi](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/drinaldi/32/32068_2.png) [@drinaldi](https://forum.inductiveautomation.com/u/drinaldi)\ **Post date:** [January 15, 2021, 7:09pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316/1 "2021-01-15T19:09:19Z")
Hello, vision client stop working or lost connection on a remote PC. Keeps saying host unreachable but the host is running and I can ping it. Any help would be great. Thanks David ![error](https://us1.discourse-cdn.com/inductiveautomation/original/3X/6/e/6eff3c033319656b15a32e0f9aef0319ca912146.jpeg) ![error2](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/e/bea87b57544f06bed69913770ddcaf720dedefb3.jpeg) ---
**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:** [January 15, 2021, 8:21pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316/2 "2021-01-15T20:21:26Z")
Is the firewall on the igntion gateway running, and is port 8088 incoming allowed? Can you connect to a client on the server itself? ---
**Author:** ![drinaldi](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/drinaldi/32/32068_2.png) [@drinaldi](https://forum.inductiveautomation.com/u/drinaldi)\ **Post date:** [January 15, 2021, 8:28pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316/3 "2021-01-15T20:28:04Z")
yes I can connect to client “on” the server. this has been running for about 1 year, so maybe IT did some update and now the firewall is blocking it. ---
**Author:** ![drinaldi](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/drinaldi/32/32068_2.png) [@drinaldi](https://forum.inductiveautomation.com/u/drinaldi)\ **Post date:** [January 15, 2021, 8:36pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316/4 "2021-01-15T20:36:18Z")
it was firewall. thank you!!! ---
**Author:** ![Alejandro\_Padilla](https://avatars.discourse-cdn.com/v4/letter/a/dec6dc/32.png) [@Alejandro\_Padilla](https://forum.inductiveautomation.com/u/Alejandro_Padilla)\ **Post date:** [August 25, 2024, 2:55pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316/5 "2024-08-25T14:55:31Z")
How did you solve it? I am a student and I have the same problem at home with 2 notebooks ---
**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:** [August 25, 2024, 3:22pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316/6 "2024-08-25T15:22:51Z")
> [@Alejandro\_Padilla](#): > > How did you solve it? > [@drinaldi](#): > > it was firewall. 🤷‍♂️ Failing to open the Windows firewall is an extremely common reason for such failures. ---
**Author:** ![Alejandro\_Padilla](https://avatars.discourse-cdn.com/v4/letter/a/dec6dc/32.png) [@Alejandro\_Padilla](https://forum.inductiveautomation.com/u/Alejandro_Padilla)\ **Post date:** [August 26, 2024, 12:18pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316/7 "2024-08-26T12:18:10Z")
Thanks for your advice, now I can open it from any other PC, it was the firewall, I made a new rule for port 8088 and that's it. Thanks again. ---
**Author:** ![Steve\_Laubach](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/steve_laubach/32/60900_2.png) [@Steve\_Laubach](https://forum.inductiveautomation.com/u/Steve_Laubach)\ **Post date:** [August 26, 2024, 4:54pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316/8 "2024-08-26T16:54:00Z")
You can get a full list of ports used by various parts of Ignition in the help. It's useful if you want to use the firewall but open the required ports. > **[Gateway Port Reference | Ignition User Manual](https://www.docs.inductiveautomation.com/docs/8.1/appendix/reference-pages/gateway-port-reference)** > > The following table describes the default ports an Ignition server may use for communication. ---
**Author:** ![brendanfboyle](https://avatars.discourse-cdn.com/v4/letter/b/e8c25b/32.png) [@brendanfboyle](https://forum.inductiveautomation.com/u/brendanfboyle)\ **Post date:** [December 6, 2025, 5:30pm UTC](https://forum.inductiveautomation.com/t/host-unreachable/42316/9 "2025-12-06T17:30:32Z")
Had this issue on Mac trying to connect to a local windows server, but persisted even when firewalls were disabled on both ends… Ended up having to go to System Settings → Privacy and Security → Local Network and Enable “java”