The default settings of MTU and MRU are suitable for most
applications and do not need to be modified usually.
In order to configure a connection check using a ping via ICMP protocol
to a domain or an IP address, enter this into the entry field "Additional
ICMP ping to". It is recommended to enter a domain name or IP address,
which can only be connected via the tunnel, here. If the connection
check is not successful, a possibly existing tunnel will be terminated, and
a new tunnel will be established. The ping interval is 15 minutes.
If a tunnel aborts, this will not be re-established automatically, but the
establishment will only be made after a new WAN connection
establishment. Therefore, the condition of the tunnel should be
checked using an ICMP ping in any case.
In order to confirm all settings for the loaded tunnel made above, click
on "OK".
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