Steam client configuration for Sophos Firewall

[Matt-Eagle]

Hi all,
I recently installed a new clean system (Win 8.1 x64) and started using Sophos Endpoint Security and Control's Firewall (Version 10.6) and am having trouble connecting to the Steam Network, when I try to log on to the Steam client.
I did some troubleshooting and can say that it is indeed the Sophos firewall that is causing problems, since everything is working nicely, when I tell the firewall to allow all traffic.
I am also aware of the Steam Support article concerning Using a Firewall with Steam . This was however not very helpful as my firewall doesn't prompt me to make new rules, when blocking an unknown programm and I cannot find all the relevant Steam executables on my Computer.

Can anyone help and tell me how to configure my firewall (shutting it down completely is ofc not an option) and/or where to locate the Steam executables, that need permissions?
(I have found Steam.exe and SteamService.exe so far and marked them as trustworthy.)

Any help would be appreciated.

[ReBoot]

The relevant Steam executables live in the Steam folder. Allow all of them.

[Seven7]

If user install steam on other partition | hdd, steam copy steamservice.exe into %system disk%:\Program Files (x86)\Common Files\Steam

Required Ports for Steam https://support.steampowered.com/kb_article.php?ref=8571-GLVN-8711
https://support.steampowered.com/kb_article.php?ref=6776-MYXU-0480

[Matt-Eagle]

Thanks for answers so far.
@ReBoot: I can only find the Steam.exe in Steam folder. Creating an application specific rule allowing this application did not solve the problem.

@Seven7: I have indeed installed Steam on a second partition, SteamService.exe was already to be found in the folder you specified.
I have come across the support page you linked here before and tried creating rules for the firewall that allow the specified ports. This did not solve the problem however, and I still get the error message "Unable to connect to Steam Network".
I am not quite sure how to set up the firewall rules in specific. Are the port adresses specified by the support page the local ports (i.e. at my computer) or the remote ports (i.e. at Steam Servers)?
Further suggestions are welcome.

[ReBoot]

Have you also digged through the subfolders? Or simply searched for *.exe files?

[Seven7]

should be allowed to all folders in the bin, steamapps \ common \

EPS is a comprehensive enterprise solution, it implies that you have in your network a special control servers, hardware & software scanners, and control all the settings through a centralized administrative console, forced application of rules for workstations ...
and also involves deprivation of premiums for the unauthorized installation in the workplace

[Matt-Eagle]

@ReBoot: I have digged through folders and can find a couple of executables but of those mentioned on the support page the only one that comes up is Steam.exe

FYI files mentioned on the support page for firewall configuration:
steaminstall.exe
steam.exe
hl.exe
hl2.exe
steamTmp.exe

引用自 Seven7：

EPS is a comprehensive enterprise solution, it implies that you have in your network a special control servers, hardware & software scanners, and control all the settings through a centralized administrative console, forced application of rules for workstations ...
and also involves deprivation of premiums for the unauthorized installation in the workplace

You are generally right, but not in this case. I am using this software on my private Computer in my private home-network. I am a student and it was provided by my university's computer center for use at private workstations and specifically for use with VPN connections to the university. (Which has nothing to do with the problems, as I have VPN disabled when trying to connect to steam. )
So the only way for me to control firewall settings is through the UI of this specific piece of software.
Did I mention that everything is running fine, as long as I disable the firewall?
[Which is not acceptable as a solution. ;) ]

[Valensia]

а

[花絮丶]

shenmedongxi

[76561198310367752]

can someone gift me a loading screen anything will do, i dont have any ...
hoping for someone with good hearted will step up and give me :) thanks

[Matt-Eagle]

Ok, update on what seems to have been a solution.
I checked some firewall protocols and figured out that Steam.exe was blocked due to a change in the file. As I had a firewall feature activated that identified allowed applications by checksums it was blocked, ofc.
Deleting and re-adding the file's checksum entry from the list solved the connection issue. I guess it will only last until steam updates again, but for now it seems to be working.

Thanks for both of you guys who were genuinely trying to help!
... the rest here is beyond words.