(v12.0.8874.35714 started 2024-04-18 18:00:37 on VM2)
UDP routing:
UDP:option ... UDP packets are sent between source and destination option is optional and may have the value "TCP". In that case an additional routing entry with TCP will be created automatically (useful for e.g. RDP). Remark: Any Gateway ports prefixed with "r" will not be processed if option TCP is specified! Caution: When listening for a port, mixing of "*" as GatewayIP with specific IP addresses as GatewayIP is not supported. In that case the rule with the specific IP address will never be chosen because the Application Gateway does not get the addressed interface. Can be used in combination with SIP: "*" as GatewayIP is not supported, data packets are sent to the destination via TCP in any case. If the keyword TTL is not specified: The default value for UDP connections (except SIP) is 2 minutes.
UDP Tunneling:
UDP:IN ... UDP packets received from source are sent to the destination via TCP (and vice versa) ... all keywords valid for the TCP destination such as CONNECT, SSLTARGET, SSLCC are allowed.
UDP:OUT ... TCP packets received from source are sent to the destination via UDP (and vice versa) ... all keywords valid for the TCP source such as SSL, CCR are allowed.
Note: A combination of two Application Gateways with keywords UDP:IN and UDP:OUT build an UDP tunnel. If this is no TLS connection, different UDP packets may be sent within one TCP packet and the receiving application must handle this!
