Zywall 5 VPN to Zywall 2 Plus MTU issue?

Need help.

Zywall 5 <--- VPN ---> 4 x Zywall 2 Plus, ping is ok both ways but example VNC connection is blank and explorer don´t work. VPN is zywall site to site.

So if there is MTU error, how it can fix it to zywall 5 or desktop computer (win xo pro)?
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Please have a look at link below which talks about configuring global VPN settings:

Please check if this helps.

Thank you.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Raikka_Author Commented:
XP MTU utility to fix problem
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Hardware Firewalls

From novice to tech pro — start learning today.