# Hosts are not connecting **URL:** \ **Category:** Rancher 1.x\ **Created:** [November 20, 2017, 10:04am UTC](https://forums.suse.com/t/hosts-are-not-connecting/7840 "2017-11-20T10:04:19Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![sergeanthorst](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/sergeanthorst/32/3808_2.png) [@sergeanthorst](https://forums.suse.com/u/sergeanthorst)\ **Post date:** [November 20, 2017, 10:04am UTC](https://forums.suse.com/t/hosts-are-not-connecting/7840/1 "2017-11-20T10:04:19Z")
I’ve got a Problem running Rancher 1.6.10 on Debian 9 with Docker 1.12.6. When I add Hosts using a unmodified kubernetes environment. The Hosts wont expose UDP Port 500 and 4500 which results that the etcd node wont get healthy. The Setup is 3 Hosts at the moment. 1 Host Running the Rancher Server and 2 Hosts which should be added. At this time I only can add 1 Hosts because the second one wont connect. I allready tried to ping the ipsec container on the first host but this wont work. So I really think there is a problem with the overlay network. I also seems that the ipsec router is stuck: 20/11/2017 11:03:04time=“2017-11-20T10:03:04Z” level=info msg="Metadata OnChange received, version: 810-4f3c5c96fb170da7fa8781d4ac55192c" 20/11/2017 11:03:04time=“2017-11-20T10:03:04Z” level=info msg=Reconfiguring Has anyone got any idea how to get the Hosts connected? Let me know if you need more Information ---
**Author:** ![sergeanthorst](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/sergeanthorst/32/3808_2.png) [@sergeanthorst](https://forums.suse.com/u/sergeanthorst)\ **Post date:** [November 21, 2017, 8:18am UTC](https://forums.suse.com/t/hosts-are-not-connecting/7840/2 "2017-11-21T08:18:01Z")
Sorry for the Noise. The Main Problem was, that the Hosts tried communicating via ipv6