This is beyond me ...
Host LAN is 192.168.1.0
Remote LAN is 192.168.10.0
Host router is Draytek Vigor 2910.
Remote router is Draytek Vigor 2930.
Both have been in service for years with no issues and have been updated with latest firmware before VPN was configured.
VPN is established between these and has run reliably via ADSL2 WAN for a couple of months.
Until lately, two + two servers have been in service, two at each location.
Now - when expanding to three servers at each location - the issue with the one of the two new servers installed (one at each location):
At remote LAN I can ping three servers at remote LAN from workstations.
From host LAN I can ping these servers at remote LAN:
- from host router 192.168.1.1 with the diagnostic tools
- from workstation on host LAN
At host LAN I can ping three similar servers at host LAN from workstations.
From remote LAN I can ping these servers at host LAN:
- from remote router 192.168.10.1 with the diagnostic tools
but from workstations on remote LAN I can ping only the two old servers at host LAN.
I have checked up and down, back and forth, but cannot see anything that could possibly block a ping between workstations on remote LAN and their router for this address, 192.168.1.222, of the new server only.
Firewall is active at both ends with the default filters. I have tried to switch both off but that changes nothing.
Where could I look to solve this, please?
Private routing table at host LAN:
S~ 192.168.10.0/ 255.255.255.0 via 192.168.1.11, VPN
C~ 192.168.1.11/ 255.255.255.255 is directly connected, VPN
C~ 192.168.1.0/ 255.255.255.0 is directly connected, LAN
Private routing table at remote LAN:
C~ 192.168.10.0/ 255.255.255.0 is directly connected, LAN
C~ 192.168.1.1/ 255.255.255.255 is directly connected, VPN
S~ 192.168.1.0/ 255.255.255.0 via 192.168.1.1, VPN