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Tinc

Tinc is a simple-to-use VPN software. It differs from other VPN implementations by building a mesh network between clients. This is useful for connecting two networks using a single VPN server without running traffic via the server.

Problems

When experiencing the issue that tinc will only sometimes connect to a server, and there are log messages like the following, then it might be that the ping timeout is too small.
```
Timeout from vpn (VPN_SERVER_IP port 655) during authentication
```
To solve this issue, increase the ping timeout in tinc's client configuration file, i.e. put the following line in /etc/tinc/<net>/tinc.conf:
```
PingTimeout = 10
```