How do I open up a specific port in the Application Level Firewall?

Currently, my system blocks port 2336 and I want to open this up. To be precise: port 2336 is listening on the local system, both on 127.0.0.1 and its 192.168.x.x address, but no client on the LAN can connect to port 2336.
IPFW and PF are not running. When I turn ALF off in System Preferences, I can connect to port 2336 from a LAN client. So ALF is blocking port 2336. How can I open this up?

Linc, thatnks for the reply. I dived into this a bit more and studied the setup of the ALF. I find it confusing, on the one hand it is mentioned in the packet filter firewall setup in /etc/pf.anchors/com.apple:
# Application Firewall anchor point.
anchor "250.ApplicationFirewall/*"
OTOH, such an entry is nowhere to be found on my system and the ALF command socketfilterfw somehow seems to suggest it is a socket filter and not a packet filter and that it is indeed working at a different level, namely the level that decides which executable is allowed to listen on which socket (port).
I am trying to find out what program is being started when I connect to port 2336 (service appleugcontrol according to /etc/services) so I can enable it with socketfilterfw. But I can't find out which program I have to enable.
I can turn off my ALF altogether, but I am used to running a firewall on my system, even if it is behind a NAT and ports are not as easily reached from the outside. I want my internal network to have some security too. In the 10.6 days, that was ipfw. Now it is PF which is off by default. I tried IceFloor to manage the PF firewall (so I can turn the ALF off) but the result was negative. Whatever I put in the settings, it blocked about everything.
The reason I want to open this port is that without it server-side file tracking for mobile home sync does not work and mobile home syncing by clients becomes very slow. Server-side file tracking for mobile home syncing requires that the FileSyncAgent on the client is able to create a SSH connection to port 2336 on the server. But as it stands now, ALF is blocking that.

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