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CentOS Hamachi Login not working / Relay mode

Did a fresh Hamachi setup on CentOS this morning according to the manual. However, the step "hamachi login" always results in a failure ("Logging in ..... failed").


I checked the following things:

- Connection from another computer in the same local network using the windows client. Works (in relay mode!). These two machines should go through exactly the same firewalls.

- Disabled Linux local firewalls (iptables, firewalld).

- Checked the h2-engine.log file. This contains some suspicious info:

12.08 11:09:00.213 ses: resolving ..
12.08 11:09:00.232 ses: selected (, 6552)
12.08 11:09:00.233 ses: selected 01 connection type
12.08 11:09:00.258 ses: resolving ..
12.08 11:09:00.309 ses: connecting to ..
12.08 11:11:07.594 ses: connection is established
12.08 11:11:07.634 ses: control connection is bound to

=> So the connection takes 2 minutes to establish? And then ...

12.08 11:11:07.634 ses: << msg_helo ..
12.08 11:11:07.658 ses: io error, send, 110
12.08 11:11:07.658 ses: error 3, retryable yes
12.08 11:11:07.683 ses: go_offline, keep_tunnels 0, login_on_relaunch 0, actual state 1 ..
12.08 11:11:07.708 ipc: 01cea800 del client

=> io error just after the connection has been established?

I assume a gateway/firewall problem (os specific?) Since I did not find any documentation on the h2-engine.cfg config file at all, is there a way to force the client into a relay mode (outbound udp connection instead of some inbound connection) directly? Inbound connections here are generally not so easy. And also firewall reconfiguration is not the preferred way.


Any ideas?

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Re: CentOS Hamachi Login not working / Relay mode