RV340 VPN tunnel with no access

[am7100]

Hi all

I have a setup with two RV340 running a ipsec default VPN tunnel with full access between a /24 subnet each. Running for the past 3 years with no problems. 
Suddenly out of the blue the tunnel does not always give access to fx print or webinterface of some things. Ping still works perfectly every time.

Sometimes it works for a bit and then it faults again

Both routers running firmware .22 

Locally both networks works fine and all printers fx works fine, but not through the tunnel. 
I have tried a different RV on one of the locations with same issue

[balaji.bandi]

May be worth running debug and seeing if you can see any Logs. or try any new upgrade available

best i suggest to contacting SMB TAC to see if they can help you.

[am7100]

Hi again!

I have narrowed it down to only 5 Brother printers not being able to print?! A HP printer works fine and also all other network related stuff as fx cameras etc works through the tunnel. But these 5 (different types) Brother printers are dead.
I have tried Brother Support without any luck.

Have some of you heard of this mysterious behaviour?