I question the competency of anyone that’s using it in production, let alone the last 15 years with far better choices available. It’s probably the most widely targeted VPN protocol because it’s so trivial to hack. and others.Īt any rate, PPTP is a wildly insecure ancient protocol and shouldn’t be used by anyone. L2TP is tunneled over UDP, so it works well with NAT, as would IKE with NAT traversal (typically UDP 4500), SSTP or SSL based VPN which is just TCP 443 like any secure web site, or OpenVPN which is UDP 1194. PPTP tunnels using GRE which doesn’t work well with NAT, especially if you try more than one device behind the NAT. The reason it becomes a problem is that many VPN protocols don’t just use TCP or UDP and require extra awareness by the router’s NAT implementation. Unless Optimum specifically has a configuration for the modem model that filters out GRE traffic, it’s not the modem.Ĭonsumer routers will apply NAT by default and not all support VPN pass through. Select the ‘Show VPN status in menu bar’ checkbox. You should see that a new VPN network interface has been added to the left-hand menu select it. Open your Mac’s ‘System preferences’ and select ‘Network.’. Enter an admin password and then click ‘OK.’. It’s the router portion of the device that’s broken, not the modem. Create a user ID, and then click ‘Install.’.
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June 2023
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