For OpenVPN, we allow connections via TCP or UDP protocols on ports 443 or 1194. The SSL VPN web portal or the SSL VPN-Plus client displays the following message: Maximum users reached/Maximum count of logged in user reached as per SSL. Maximum count of logged-in users is reached. SSL VPN-Plus client is installed, but the SSL VPN-Plus services are not running. SSL VPN-Plus client is unable to connect to the SSL VPN server.
Can be more difficult to configure on a router because it uses multiple ports Fixes vulnerabilities seen in PPTP, but as a result, the connection could be a little bit slower than OpenVPN Recommended for mobile devices that will not allow you to use the OpenVPN Protocol Not recommended for very sensitive information.L2TP w/ IPSEC(Layer 2 Tunneling Protocol with Internet Protocol Security) There are some known security vulnerabilities Typically used on older operating systems and older mobile devices
To allow L2TP w/ IPSec traffic, open UDP ports 500, 1701 & 4500. To allow PPTP traffic, open TCP port 1723. Routers without these options may not support PPTP or L2TP traffic.
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