@Somnus I have solved the problem finally; it wasn't enabled options ALG ( Application Layer Gateway) to router. One enabled all options inside section it started to allow access to VPN. All options...

Hi, I recently purchased a TL-R600VPN router but my laptop can't connect to my work VPN LTP2. I copy all configuration from my previous router TL-WR810N (non gigabit) but new TL-R600VPN blocked me on...