The attack targets IKE’s handshake implementation used for IPsec-based VPN connections, opening the door for MiTM attacks or for bad actors to access data carried in VPN sessions.

A researcher challenges a conclusion in a recent academic paper on weak Diffie-Hellman implementations that claims 66 percent of IPsec VPN connections are at risk.

Phase 1 apparently completes successfully but after 1 second ISAMP-SA expires and is deleted. VPN log: Mar 13 15:05:40 racoon: [VPN]: INFO: ISAKMP-SA established Site A WAN [500]-Site B WAN[500 ...

A note on IPsec ports: If you’re looking to set up your firewall to allow an IPsec VPN connection, be sure to open UDP port 500 and IP ports 50 and 51.

But after a packet goes through the IPSec or L2TP VPN tunneling process, it has the same network address. This concept is invaluable when setting up and troubleshooting NAT and VPN together.

WiTopia WiTopia's entry level plan starts at $39.99/year (PPTP only) and goes up to $69.99/year, which includes PPTP and OpenVPN/IPSec VPN support.