6-6-2020 EDIT : removing "-tcp" from the batch file startup parameters solved it.

6-21-2020 EDIT : This error occurs periodically due to an extremely slow response time. The hardware the server is running on is very slow, and does have a North Bridge. Restarting SRCDS via the Watchdog solved it 70% of the time. 30% of the time consecutive restarts solved it. If you think this is your issue, I would try to increase RAM and Network speeds.

I am trying to host a Garry's Mod dedicated server on Windows Server 2008 R2 SP1 64 bit

The same exact server configuration worked without any problems or errors on my personal machine, running Windows 7 Ultimate 64 bit.

I have configured the registry and advanced firewall settings as per this article: https://forums.alliedmods.net/showthread.php?t=189327

When I launch the server using my start.bat file, the console says "Steam failed to log us in after 10 seconds!" in bold red text. This results in none of the workshop addons working, the server failing to show up in the master server browser, and all direct connections to the local ip and wan ip timing out.


UPDATED BATCH FILE EDIT

specs of the machine running the server:

Xeon W-3530, 2 cores 2 threads, hyperthreading not supported
9Gb RAM, 4x4x1 in dual channel config @ 1066MHz
200Gb 7200 RPM Maxtor IDE HDD

Specs of my personal rig, where the server ran fine:

I7-3770, 4 cores 8 threads, hyperthreading enabled
32Gb RAM, 4x8 dual channel
500Gb Crucial BX500 SSD

Things I've tried to fix the problem:

Disabling windows firewall completely
installing Directx 9 end user runtime
installing VCredist 64 bit 2010
updating Gmod game files
updating SteamCMD
reconfiguring Router Port forwarding*
opening ports 26900 and 26901 in windows advanced firewall on UDP and TCP

*My personal rig was assigned various ips via DHCP, however I have set a reserved ip for the server machine on my router so I don't have to change port forward settings every week and a half.

I have Comcast as my ISP and am using their standard router/gateway.

having worked mostly with personal computers for the last ten years, servers and networking is relatively new to me, so if you've got any tips or general info that'd be pretty cool.

Several hours of googling have shown that either nobody else has had this problem or never bothered to post about it.

Any suggestions for a potential solve would be greatly appreciated.