I have a site-to-site VPN tunnel between my organization and another organization. Lately, my client and the users on my Network who uses this tunnel have been complaining about disconnection of this VPN link. What could be causing the disconnection? advice advice the possible areas to check for the disconnection.
Ideally, VPN connectivity is tested from devices behind the endpoint devices that do the encryption, yet many users test VPN connectivity with the ping command on the devices that do the encryption. While the ping generally works for this purpose, it is important to source your ping from the correct interface. If the ping is sourced incorrectly, it can appear that the VPN connection has failed when it really works.
This document helps you to verify the connectivity.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...