# Failed to find nic

**URL:** <https://forums.suse.com/t/failed-to-find-nic/341>\
**Category:** Rancher 1.x\
**Created:** [August 27, 2015, 1:26pm UTC](https://forums.suse.com/t/failed-to-find-nic/341 "2015-08-27T13:26:17Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![tobkle](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/tobkle/32/155_2.png) [@tobkle](https://forums.suse.com/u/tobkle)\
**Post date:** [August 27, 2015, 1:26pm UTC](https://forums.suse.com/t/failed-to-find-nic/341/1 "2015-08-27T13:26:17Z")

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Managing several hosts over several DigitalOcean droplet is working fine. But everytime I try to add one of my own hosts, I get into trouble. It stucks always while setting up containers. Rancher Server brings the following error.

2015-08-27 13:09:57,217 ERROR [ad74edaa-5237-4979-9551-b25081b5da29:55] [networkServiceProviderInstanceMap:1] [networkserviceproviderinstancemap.activate-\>(AgentInstanceApplyItems)] [] [cutorService-16] [i.c.p.a.i.p.AgentInstanceApplyItems] Failed to find nic for [networkServiceProviderInstanceMap:1]

No Idea where to start. Switching off the firewall didn’t solve the problem. Running rancher-server and rancher-agent on my own hosts causes the same error. Can you help?

By the way I’ve started rancher server with this settings:  
sudo docker run   
-d   
–restart=always   
–name rancher-server   
–label io.rancher.container.network=true   
-p 8080:8080   
-v /home/rancher/db:/var/lib/mysqli   
rancher/server

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**Author:** ![tobkle](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/tobkle/32/155_2.png) [@tobkle](https://forums.suse.com/u/tobkle)\
**Post date:** [August 27, 2015, 7:37pm UTC](https://forums.suse.com/t/failed-to-find-nic/341/2 "2015-08-27T19:37:37Z")

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SOLVED myself: Suppose it was the IPv4 hardening of the hosting provider.

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**Author:** ![denise](https://avatars.discourse-cdn.com/v4/letter/d/82dd89/32.png) [@denise](https://forums.suse.com/u/denise)\
**Post date:** [August 28, 2015, 4:46pm UTC](https://forums.suse.com/t/failed-to-find-nic/341/3 "2015-08-28T16:46:15Z")

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Let us know if you need any more help. Glad that you were able to resolve it.

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**Author:** ![tobkle](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/tobkle/32/155_2.png) [@tobkle](https://forums.suse.com/u/tobkle)\
**Post date:** [August 29, 2015, 11:18am UTC](https://forums.suse.com/t/failed-to-find-nic/341/4 "2015-08-29T11:18:01Z")

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Well. I thought I solved it. Got the error back later. Got one cryptic java error after the other. After spending 4 days on trying different settings, configurations and machines, I gave up. It would help to have some more hints about what prerequisites and which network/firewall settings should be there. Maybe an step-by-step idiot’s guide on Ubuntu might help. Tried it on a blank bare metal server with Ubuntu and also CoreOS. RancherOS I was not able to install, because I cannot provide an ISO image to my server at my provider. Tried it also with a big Synology NAS Server, but there it was even worse. 500/udp and 4500/udp were always opened and had ipv4 port forwarding. I tried to compare with the DigitalOcean settings, but I couldn’t figure out what was wrong.