Serve Application from my Mac over LAN I am trying to serve an application I'm developing over the LAN at work. I'm doing this using Apache and this is working fine locally, but when I try to access from another client on the network the http request is timing out. The requests are definitely hitting the Mac as in /var/log/trac.log I can see:

[ 94 14855][20 May 13:15:29][TR_FIREWALL] CFirewallWrapper::NotifyCallback: cRule = rule-3, srcIp=172.18.48.116, dstIp=172.18.48.240


I'm serving over an arbitrary port (23736) to avoid any conflicts but I don't believe the problem lies with apache. If I locally browse to 172.18.48.240:23736 there is no problem. When the external client requests the same there is nothing being added to the Apache access/error logs.

The firewall in system preferences is disabled and I've added the following to /etc/pf.conf:

pass in proto tcp from any to any port 23736


before running:

sudo pfctl -vnf /etc/pf.conf


and rebooting.

At this point I'm just about out of ideas so any help greatly appreciated
You shouldn't need a firewall rule to forward packets because Apache can listen on your selected port.  Leaving it as port 80 also won't conflict with anything. 

What you need to look at is your httpd.conf file.  Specifically, the "Listen" directive

# Listen: Allows you to bind Apache to specific IP addresses and/or
# Change this to Listen on specific IP addresses as shown below to 
#Listen 12.34.56.78:80
Listen 23736


Since it's working locally, but not on another client (I'm assuming on the same subnet), you may have the directive set as localhost:23736.

If that's the case, it would cause the symptoms that you are seeing.

What you should have is what I posted above, or to restrict it to a particular IP:

Listen 172.18.48.240:23736

Once you make the change, restart Apache.