WHAT PORT DOES THE VPN USE?
Our VPN is using a protocol called IPSec. IPSec VPN port assignments for uses of Encapsulation Security payload (protocol 50) and Authentication Header (protocol 51). Port 88 for Kerberos authentication in TCP/UDP and port 500 for Internet Security Association and Key Management Protocol in TCP/UDP. SSL VPN for secure HTTP application uses port 443. PPTP encapsulates packets using GRE- Generic routing protocol which uses IP port 47. The IANA list 1723 as the port for VPN. A common mistake in configuring firewalls for use with PPTP is to open port 1723 and close IP port 47. This allows connections to be established but denies the actual data from passing through the tunnel to the machine. Some software utilities verify if both the ports are open for GRE in PPTP to be used. L2TP protocol is assigned 115 as its port number. MPLS-in IP uses port 137 For the systems that use VPN hardware normally port 500, 4500, 10000 & 10001 are used. One for outgoing traffic and the other for incoming tra
Related Questions
- I am experiencing problems with only one VPN Client (for releases 3.3 and earlier) being able to connect through a Port Address Translation (PAT) device. What can I do to alleviate this problem?
- How does the RV-Series VPN Router dual/multi Internet (WAN) port feature work?
- Which port is needed by TheGreenBow IPSec VPN Client ?
