Technical Note: Traffic Types and TCP/UDP Ports used by

500/udp - Pentesting IPsec/IKE VPN - HackTricks The IPSec configuration can be prepared only to accept one or a few transformations. A transformation is a combination of values. Each transform contains a number of attributes like DES or 3DES as the encryption algorithm, SHA or MD5 as the integrity algorithm, a pre-shared key as the authentication type, Diffie-Hellman 1 or 2 as the key distribution algorithm and 28800 seconds as the lifetime. Does IOS block VPN on port 53 : WireGuard Any reason why you're wanting to use UDP/53? While DNS uses TCP/53, UDP/53 is used when a client sends a query to the DNS server. I recommend using a different port. OpenVPN Service: UDP vs TCP, Which is better? UDP VPN Service. Faster Speed – UDP VPN service offers significantly greater speeds than TCP.For this reason it is the preferred protocol when streaming HD videos or downloading torrents/p2p . Preferred – UDP VPN tunnels are the preferred OpenVPN connection method if your network supports it. Lower Reliability – On rare occasions UDP can be less reliable that TCP VPN connections as UDP Free vpn service udp 53 trend: AskVPN - Best Free VPN

I have setup, port 53 for openvpn and I saw that the server doesn't replay on that port in order to establish connection. All other openvpn ports are ok. The port is open, and working as udp port for softether vpn over dns/icmp.

HOW TO Introduction. OpenVPN is a full-featured SSL VPN which implements OSI layer 2 or 3 secure network extension using the industry standard SSL/TLS protocol, supports flexible client authentication methods based on certificates, smart cards, and/or username/password credentials, and allows user or group-specific access control policies using firewall rules applied to the VPN virtual interface. Ports and Protocols | FortiGate / FortiOS 6.2.0 | Fortinet Incoming ports. Purpose. Protocol/Port. FortiAP-S. Syslog, OFTP, Registration, Quarantine, Log & Report. TCP/443. CAPWAP. UDP/5246, UDP/5247. FortiAuthenticator Specification - SoftEther VPN Project

The IPSec configuration can be prepared only to accept one or a few transformations. A transformation is a combination of values. Each transform contains a number of attributes like DES or 3DES as the encryption algorithm, SHA or MD5 as the integrity algorithm, a pre-shared key as the authentication type, Diffie-Hellman 1 or 2 as the key distribution algorithm and 28800 seconds as the lifetime.

VPN connectivity and troubleshooting guide - OutSystems DNS Servers: As detailed in the initial VPN configuration; Protocol / Port : UDP 53; Domain to be resolved: outsystemsenterprise.com; Resolve your network's internal domain names (for those hostnames that are local to your network and aren't publicly accessible) using OutSystems cloud DNS service. Fix 'TLS Error: TLS handshake failed' on OpenVPN client