Netgear router setup problem

I have router netgear RP614 V3. I'd like to connect 2 computers to LAN

and internet. LAN works successfully between both comp-s, but if I try

to go to internet from both computers? I can't. Only 1 comp. have

access to unternet and provider LAN.

For internet connection I use VPN connection. all IP's setupped

automatically, i.e. DHCP turn on. IP's register automatically.

MTU packet size is 1500.

I try to decrease MTU for 1454 and 1492 but nothing changes.

Also I try to give IP's for both machines manually: for one -

router adress - 192.168.0.1 and mask - 255.255.255.0

does this mean both work, but only 1 at a time?

if so, this is often about the type of VPN and config - for some setups the router cant keep the 2 VPN connections logically separate thru the NAT function.

try setting the VPN to use TCP encapsulation if you can