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AD replication over IPsec

Nick Maynard1

 Hi all,

 

I'm having a strange issue where our AD servers. they are failing to replicate over IPsec.

This is my VPN_LAN and LAN _VPN rules

this is the error 

 

Not sure where to go with this, we are only seeing this on sites that have a sophos xg



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    Hi Nick,

    I saw this on a site once and it was down to the MTU wherein for some reason one of the devices/switch did not like having a high MTU so it fragmented the packets and the XG didn't like it and canned them. Everything else was fine and you could RDP, Ping and pretty much most things but Domain stuff just wasn't having it due to LDAP and Kerberos issues because of the MTU.

    May not affect you, but worth checking.

    Emike