Adding MORE conditions means your port forward rule will match LESS traffic. IMPORTANT: The reason simple rules are encouraged is that users tend to misconfigure the port forward rule conditions. If your Untangle has multiple public IPs and you only want to forward traffic to one of them you can use Expert Rules. Simple Rules match all Destined Local traffic as described in Rules.only to a certain public IP (not all Untangle IPs).For example, you can limit forwarded traffic to traffic from a specific interface, specific IP range, etc. Expert Rules allow for additional conditions to limit when a port forward will match.further limiting what traffic is forwarded.If you also want to change the destination port, expert rules are necessary. Simple Rules only rewrite the destination address.Simple Rules can only forward TCP and UDP.

There are cases where a more complex rule is desired, such as: Typically this is the internal machine like 192.168.1.100. The new destination of the session after the port forward.To specify an arbitrary port, select Other and specify the port. Use commas to separate multiple ports, or a dash to denote a range. This is a list of commonly forwarded ports.If 'TCP & UDP' both TCP and UDP to the specified port is forwarded. If 'UDP' then only UDP traffic to the specified port is forwarded. If 'TCP' then only TCP traffic to the specified port is forwarded.If unchecked the rule has no effect and is disabled. It is suggested to always use simple port forward rules where possible. Simple rules allow for most use cases and avoid extra configuration, which can lead to non-functional forwards. To add a regular rule as described in the Rules documentation click Add. To add a Simple Rule click Add Simple Rule. If you are having issues with port forwards, it is suggested to follow the Port Forward Troubleshooting Guide If not rule matches, then no changes are made to the session. The destination will be rewritten to the New Destination and the New Port of the first matching rule. Rules are evaluated in order on all new sessions. Port Forwards Rules work like all rules in Untangle which is described in the Rules documentation. The most common use is on networks doing NAT where internal servers have private addresses (ie 192.168.1.100), port forwarding allows the forwarding of traffic to the Untangle server's public IP to an internal host.ДЇor example, if the email server is behind Untangle with a private address (192.168.1.100) and Untangle has one public IP (1.2.3.4) which all hosts are 'sharing' via NAT to reach the internet, then port forwarding can be used to forward TCP traffic to 1.2.3.4 port 25 (SMTP) to 192.168.1.100 port 25. Port forwarding is a technique of rewriting the destination address and destination port of packets to send them to a new location.

Portforward test