Windows Security Alert when opening a Steam game

[Aurola Light]

Not sure if someone already made a thread about this but anywhoo..
For example, I opened up Garry's Mod. Before the game loaded up, the Windows Security Alert pop up shows up, asking to access/allow this app through firewall. First, I exited the game, then tried..

(services.msc>Security Center>General Tab>Startup Type: Disabled)

After trying that solution, I started up the game, yet the pop up showed up again. Is there no solution to this?

[eddiepc]

allow it access or add the firewall exception manually.

if you want to use multiplayer the game needs access through the firewall so it can connect to the internet.
i dont know how the game handles mod downloads but id imagine it needs access for that too.

firewall pop up is normal for multiplayer/online games,it should only ask once though,then it is added to the exceptions list.