# Swarm and Nodes **URL:** \ **Category:** General\ **Created:** [January 2, 2020, 3:29am UTC](https://forums.chaos.com/t/swarm-and-nodes/96778 "2020-01-02T03:29:15Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![blueskydesigngroup](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@blueskydesigngroup](https://forums.chaos.com/u/blueskydesigngroup)\ **Post date:** [January 2, 2020, 3:29am UTC](https://forums.chaos.com/t/swarm-and-nodes/96778/1 "2020-01-02T03:29:15Z")
Hi There, We have 4 Vray licenses and 1 Render Node. I cant seem to get to node to render when i start a swarm session. 2 of the machines in the office go to unstable. Could you explain how i can get it to work? Also, the node seems to be offline yet available?? Cheers ![.png.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/5/6/56bd18215d7981ca463600956e2f00b5545f77c1.png) ---
**Author:** ![ivan.slavchev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/ivan.slavchev/32/4680_2.png) [@ivan.slavchev](https://forums.chaos.com/u/ivan.slavchev)\ **Post date:** [January 2, 2020, 10:27am UTC](https://forums.chaos.com/t/swarm-and-nodes/96778/2 "2020-01-02T10:27:19Z")
“Offline” means that the license is [borrowed](https://docs.chaosgroup.com/display/LIC5/Borrowing+Licenses+for+Offline+Use), currently on “MINA-PC”. “Unstable” indicates a setup issue, or more often - a license issue. I can see there was 1 free license when the screenshot was taken. Make sure that TCP ports 24267 and 20207 and UDP 24267 are allowed if you have firewalls on between computers. See this for instructions - [Chaos Docs](https://docs.chaosgroup.com/display/VNFR/V-Ray+Swarm) If you need additional assistance - don’t hesitate to message us at [support@chaosgroup.com](mailto:support@chaosgroup.com) ---
**Author:** ![blueskydesigngroup](https://avatars.discourse-cdn.com/v4/letter/b/35a633/32.png) [@blueskydesigngroup](https://forums.chaos.com/u/blueskydesigngroup)\ **Post date:** [January 2, 2020, 11:09am UTC](https://forums.chaos.com/t/swarm-and-nodes/96778/3 "2020-01-02T11:09:58Z")
Hi Ivan, I can’t return the License as it’s not listed as borrowed. Where do I set the ports… by default on the vray install I ticked the box for firewall exceptions. cheers Justin ---
**Author:** ![ivan.slavchev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/ivan.slavchev/32/4680_2.png) [@ivan.slavchev](https://forums.chaos.com/u/ivan.slavchev)\ **Post date:** [January 2, 2020, 11:43am UTC](https://forums.chaos.com/t/swarm-and-nodes/96778/4 "2020-01-02T11:43:57Z")
> I can’t return the License as it’s not listed as borrowed. > I released it for you. Can you try rendering again? > Where do I set the ports… by default on the vray install I ticked the box for firewall exceptions. > You can check in [Windows Firewall](https://www.windowscentral.com/how-open-port-windows-firewall)