Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.


Question: AppleMobileDeviceService.exe uses Half-Life server port number 27015

I don't think this is a problem, but have noticed several discussions on the Internet which seem confused by this.

UDP port 27015 is the standard port used by Half-Life servers to communicate with clients.

TCP port 27015 seems to be used by AppleMobileDeviceService.exe to communicate locally with iTunes.exe and iTunesHelper.exe.

Since they are different protocols, there shouldn't be any conflict, but I haven't seen any mention of this in discussions I've found and I know a lot of people who, when the open up a firewall for a particular port, will open in for both UDP and TCP.

I don't know if this is a vulnerability, i.e. if an open firewall port would allow anything on the PC to be compromised, but I'm surprised Apple chose a port number which is so well-known, rather than a new arbitrary one, as there does seem to be the potential for a problem.

In any event, I intend to keep TCP port 27015 closed in my firewalls!

Fujitsu Siemens Amilo L 6825, Windows XP Pro, iPod touch

Posted on


Page content loaded

Aug 13, 2008 3:07 PM in response to StarNamer In response to StarNamer

In my firewall (Sunbelt Personal Firewall) I'm showing two local point connections from the AMDS at port 27015 (both on the TCP protocol) as well as a listening point at port 27015 for the TCP protocol. I'm not sure where you got your information StarNamer, but source dedicated servers use both TCP and UDP ports.

UDP 1200 (Friends Network)
UDP 27000 to 27015 (Gameport)
UDP 27020
TCP 27030 to 27039
TCP 27015 (SRCDS Rcon port)

See this page for more information: http://planethalflife.gamespy.com/View.php?view=HL2Guides.Detail&id=4&game=3

Aug 13, 2008 3:07 PM

Reply Helpful

Aug 18, 2008 2:37 PM in response to balanceone In response to balanceone

I'm still having issues connecting to servers on Steam... It seems the AMDS is at fault as it's sitting on that port all day long, not sure if anyone else noticed this recently but things weren't always like this.


Aug 18, 2008 2:37 PM

Reply Helpful
User profile for user: StarNamer

Question: AppleMobileDeviceService.exe uses Half-Life server port number 27015