VPN & (SMTP,FTP)

Hi.
Problem such.
The microtic is connected to the Internet through vpn, but at such connection it limits connection on smtp, pop3, ftp. But if to be connected to it from a local network too on vpn all it is normal.

In what there can be a problem?

In advance thanks.

check your firewall filters, maybe there is something that is limiting you

The filter any did not put.
Only has established system and has adjusted connection. All rest without restrictions

But during same time the Internet works quickly. Ports are not closed

Possibly an MTU problem? 1500 byte packets will not fit down the VPN tunnel without breaking them up, and if the sender uses DONT FRAGMENT and blocks icmp than you are in trouble.

Sam

It is established by default 1460. Can put less?

Has established value MTU 1500 and all has earned well. Thanks.