Ipsec needs UDP port 500 + ip protocol 50 and 51 - but you can use NAt-T instead, which needs UDP port 4500. On the other hand L2TP uses udp port 1701. If you trying to pass ipsec traffic through a "regular" Wi-Fi router and there is no such option as IPSec pass-through, I recommend opening port 500 and 4500. At least that is how it works on mine.

Ipsec needs UDP port 500 + ip protocol 50 and 51 - but you can use NAt-T instead, which needs UDP port 4500. On the other hand L2TP uses udp port 1701. If you trying to pass ipsec traffic through a "regular" Wi-Fi router and there is no such option as IPSec pass-through, I recommend opening port 500 and 4500. At least that is how it works on mine. For systems without a locally defined IPSec policy enabled, follow these steps to create a new local static policy to block traffic that is directed to a specific protocol and port on a Windows 2000-based computer without an existing IPSec Policy assigned: Am attempting to connect via an IPSEC VPN to a pfsense server (Release 2.2) The Cisco VPN client works fine with "IPSEC over UDP" but when "IPSEC over TCP" is selected, I can see (via packet capture) that the TCP SYN packets are arriving at the pfsense se Aug 27, 2019 · Some firewalls allow selective configuration of UDP or TCP ports with the same number, so it's important to know the type of port you're configuring. For example, NFS can use TCP 2049, UDP 2049, or both. If your firewall doesn't allow you to specify the type of port, configuring one type of port probably configures the other.

Xbox One (LIVE) ports: 3074 TCP/UDP, 53 TCP/UDP, 80 TCP, 88 UDP, 500 UDP, 3544 UDP, 4500 UDP isakmp_sub_print in tcpdump 3.6 through 3.7.1 allows remote attackers to cause a denial of service (CPU consumption) via a certain malformed ISAKMP packet to UDP port 500, which causes tcpdump to enter an infinite loop.

TCP: For VS 2017. The port number increments by 2 for each Visual Studio version. For more information, see Visual Studio remote debugger port assignments. 4023: Incoming: TCP: For VS 2017. The port number increments by 2 for each Visual Studio version. This port is only used to remote debug a 32-bit process from a 64-bit version of the remote

—Specify the local and remote UDP port numbers. Each configured proxy ID will count towards the IPSec VPN tunnel capacity of the firewall. This field is also used as an IKEv2 traffic selector.

Aug 27, 2019 · Some firewalls allow selective configuration of UDP or TCP ports with the same number, so it's important to know the type of port you're configuring. For example, NFS can use TCP 2049, UDP 2049, or both. If your firewall doesn't allow you to specify the type of port, configuring one type of port probably configures the other. Functionality: Port(s) Windows share: UDP 137-139 and TCP 445: Syslog Note : If a secure connection has been configured between a Fortigate and a FortiAnalyzer, Syslog traffic will be sent into an IPSec tunnel. IPSec may also need ESP (Encapsulated security Protocol, IP protocol 50), and AH (Authentication Header, IP protocol 51) SSTP (Secure Socket Tunneling Protocol) VPN, a.k.a. SSL VPN - uses private key to encrypt data over a SSL connection port 443 TCP Note: may also use ports 465 (Secure SMTP), 993 (Secure IMAP), and 995 (Secure POP) OpenVPN Visitor Mode tunnels all client-to-Security Gateway communication through a regular TCP connection on port 443. All required VPN connectivity (IKE, IPsec, etc.) between the Client and the Server is tunneled inside this TCP connection. This means that the peer Security Gateway needs to run a Visitor Mode (TCP) server on port 443. RFC 3948 UDP Encapsulation of IPsec ESP Packets January 2005 3.Encapsulation and Decapsulation Procedures 3.1.Auxiliary Procedures 3.1.1.Tunnel Mode Decapsulation NAT Procedure When a tunnel mode has been used to transmit packets (see [RFC3715], section 3, criteria "Mode support" and "Telecommuter scenario"), the inner IP header can contain addresses that are not suitable for the current network.