Tag Archives: isakmp

VPN Ports

  PPTP:To allow PPTP tunnel maintenance traffic, open TCP 1723.To allow PPTP tunneled data to pass through router, open Protocol ID 47. L2TP over IPSecTo allow Internet Key Exchange (IKE), open UDP 500.To allow IPSec Network Address Translation (NAT-T) open UDP 4500.To allow L2TP traffic, open UDP 1701. OpenVPN: OpenVPN uses port 1194 udp and… Read More »