Question

I am getting a bit desperate after hours of research:

A Windows 7 computer with a local PHP application that listens to port 12345 with a socket.
From the same Windows 7:

• If I do telnet localhost 12345, the php code sees the connection.
  
• If I do telnet 127.0.0.1 12345, the php code sees the connection.
  
• If I do telnet <local_ip_address> 12345, the php code DOES NOT see the connection.
  
• If I do telnet <dns_name> 12345, the php code DOES NOT see the connection.
  

From another machine I don’t have any connection at all when I use the ip or the dns address.



Doing a telnet from another machine with the same address but on ports 80 or 21 work perfectly.

Even with the local firewall / antivirus disabled I get the same result.

I am using a standard Apple TimeCapsule as access point, but not configured specially, not sure if that can influence for ports > 1024…

Would you have any idea for me ?

Thanks !

Answer 1

There are really 2 options to get this behavior that I can see;

• Your firewall is enabled (which you tested)
• Your socket is binding to 127.0.0.1 instead of your public IP.

I’d have a look at your local binding, aka the address you give to socket_bind().

If it says “127.0.0.1”, change it to 0.