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Server Blocker

Forum Index > SC2 General
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SC-Shield
Profile Joined December 2018
Bulgaria874 Posts
Last Edited: 2020-12-28 14:47:52
December 28 2020 13:39 GMT
#1
Hi guys,

I've updated my SC2ServerBlocker program to block game servers in SC2. The common use case is if you play on US server but are matched on an Australian one due to opponent(s). Some people experience lag issues, so you might improve your latency/chances to win if you deselect/block some of servers.

In general, I've seen the following during my testing.
Regions:
EU
Only one server, EU Central. It's not listed in the program.

US
- US West
- US East
- US Central
- Brazil
- Singapore
- Australia

KR
- Korea
- Taiwan

Download: https://www.mediafire.com/file/n8r73lnutp572yp/SC2ServerBlocker.zip/file
Source code: https://github.com/bbalchev/SC2ServerBlocker

Note: my antivirus is suspicious but after scan is complete it says the file is ok. Don't be alarmed. You can check source code for peace of mind.

How it works
First, if you don't have lag issues, you don't need to use this program. If you get a laggy game, I suggest you use "Ctrl+Alt+F" in the laggy game to see what server you're on.
Example: If you're playing on US but on the top left corner (after you execute "Ctrl+Alt+F") you see a non-US server, e.g. Australia, then it's a good candidate for blocking so you're not matched on this server again if it's laggy for you.
Here is a screenshot of top left corner where game server is specified as well as ping:
+ Show Spoiler +

[image loading]


Special thanks to LaughNgamez for helping me with game settings to switch to various servers. Also thanks to wooptr for his original thread here: https://tl.net/forum/starcraft-2/547926-how-to-block-australia-brazil-singapore-servers
I've just automated his instructions and updated IP addresses of Australia and Taiwan since my last post there.

Screenshot:
[image loading]

LaughNgamez
Profile Joined April 2015
Canada525 Posts
December 28 2020 13:50 GMT
#2
Handy tool I recommend everyone use if you get tilted by high ping like me :D

Why Blizzard never included a base option to play only on local servers beats me.
(◕‿◕✿) Hopefully one day a decent caster http://www.youtube.com/LaughNgamez (◠‿◠✿)
Elevenst
Profile Joined April 2010
Canada249 Posts
December 28 2020 14:25 GMT
#3
How does it work?
SC-Shield
Profile Joined December 2018
Bulgaria874 Posts
Last Edited: 2020-12-28 14:47:42
December 28 2020 14:34 GMT
#4
On December 28 2020 23:25 Elevenst wrote:
How does it work?


I've added a section to explain. Thanks for feedback.


How it works
First, if you don't have lag issues, you don't need to use this program. If you get a laggy game, I suggest you use "Ctrl+Alt+F" in the laggy game to see what server you're on.
Example: If you're playing on US but on the top left corner (after you execute "Ctrl+Alt+F") you see a non-US server, e.g. Australia, then it's a good candidate for blocking so you're not matched on this server again if it's laggy for you.
Here is a screenshot of top left corner where game server is specified:
+ Show Spoiler +

[image loading]

_fool
Profile Joined February 2011
Netherlands684 Posts
Last Edited: 2020-12-28 15:29:35
December 28 2020 15:27 GMT
#5
As to how it works technically (not functionally, that's explained above ^^): looks like the application defines firewall rules using the netsh tool that comes with windows. So basically the tool saves you typing stuff like this by hand in the cmd.exe shell:

/C netsh advfirewall firewall add rule name="ScBrazil" Dir=Out Action=Block RemoteIP=123.123.123.123(+more IPs)

It's not modifying SC2 files, just reconfiguring the Windows firewall like anyone with the correct commands could.
"News is to the mind what sugar is to the body"
Elevenst
Profile Joined April 2010
Canada249 Posts
December 28 2020 17:09 GMT
#6
On December 29 2020 00:27 _fool wrote:
As to how it works technically (not functionally, that's explained above ^^): looks like the application defines firewall rules using the netsh tool that comes with windows. So basically the tool saves you typing stuff like this by hand in the cmd.exe shell:

/C netsh advfirewall firewall add rule name="ScBrazil" Dir=Out Action=Block RemoteIP=123.123.123.123(+more IPs)

It's not modifying SC2 files, just reconfiguring the Windows firewall like anyone with the correct commands could.

this is what i wanted thanks
oBlade
Profile Blog Joined December 2008
United States6426 Posts
December 28 2020 17:34 GMT
#7
On December 28 2020 22:50 LaughNgamez wrote:
Handy tool I recommend everyone use if you get tilted by high ping like me :D

Why Blizzard never included a base option to play only on local servers beats me.

At the time the technology wasn't yet developed to isolate regions to play with each other locally.
"I read it. You know how to read, you ignorant fuck?" - Andy Dufresne
vg162
Profile Joined January 2020
6 Posts
December 28 2020 18:54 GMT
#8
wooptr get the hell in here
ZigguratOfUr
Profile Blog Joined April 2012
Iraq16955 Posts
December 28 2020 19:19 GMT
#9
On December 28 2020 22:50 LaughNgamez wrote:
Handy tool I recommend everyone use if you get tilted by high ping like me :D

Why Blizzard never included a base option to play only on local servers beats me.


I mean they did--they just chose to make 'preferred servers' not apply from Masters and up (possibly due to ladder qualifier abuse like what Polt and Hydra were doing).

Though given the prevalence of people blocking servers Blizzard absolutely should make it apply to everyone again (and change it so people can select multiple servers). Since right now people that don't block servers are at an unfair ping disadvantage against people that do.
-Kyo-
Profile Blog Joined August 2010
Japan1927 Posts
December 29 2020 04:50 GMT
#10
Just messaged you about this again last week or so. Thanks for updating it again. You might not be aware of how many people actually use this, including a lot of GM players
Anime is cuter than you. Legacy of the Void GM Protoss Gameplay: twitch.tv/kyo7763 youtube.com/user/KyoStarcraft/
TL+ Member
SC-Shield
Profile Joined December 2018
Bulgaria874 Posts
Last Edited: 2020-12-29 12:23:34
December 29 2020 12:16 GMT
#11
On December 29 2020 13:50 -Kyo- wrote:
Just messaged you about this again last week or so. Thanks for updating it again. You might not be aware of how many people actually use this, including a lot of GM players


Yes, I remember. I've updated the program since I replied to you. There is now a confirmation message when you click Block/Unblock buttons (it was so confusing and I don't know why I didn't do it initially). Also I've added missing IP addresses of Australia and Taiwan, I guess they've got updated at some point. I think it's good to update. Thanks for feedback!
Therapist.
Profile Joined January 2009
United States207 Posts
December 29 2020 16:22 GMT
#12
Thanks for doing this!

How do you determine the IP addresses of new servers as they are added?

Since the IP addresses of the servers will change and you may not always be around to update this app, it would be very helpful to be able to determine what the IP's of a given server region are.
SC-Shield
Profile Joined December 2018
Bulgaria874 Posts
Last Edited: 2020-12-29 17:30:29
December 29 2020 17:28 GMT
#13
On December 30 2020 01:22 Therapist. wrote:
Thanks for doing this!

How do you determine the IP addresses of new servers as they are added?

Since the IP addresses of the servers will change and you may not always be around to update this app, it would be very helpful to be able to determine what the IP's of a given server region are.


Applies to US and KR regions only (EU has only one type of server, EU Central):
First, you need to go to Options -> Language and Region. Then, select "Pick Game Server on Lobby Creation".
Screenshot:
+ Show Spoiler +

[image loading]



This way, when you create a custom game, you will have the following list of servers:
+ Show Spoiler +

[image loading]



Pick server of your interest from that list (e.g. Brazil) and create a game. You could add AI as your opponent. When game is created, run Wireshark (packet sniffer program) and look for UDP traffic. You should see similar exchange of traffic like below:
+ Show Spoiler +

[image loading]



Tip: close as many applications as possible beforehand to reduce noise.
Note: above traffic exchange isn't specific to any game server, I'm unable to host a game at the moment. It's just an example how it could look like.
Required programs: Wireshark - https://www.wireshark.org/

I might create a quick configuration file for next update where people could add IPs manually which will be useful when they change.


Therapist.
Profile Joined January 2009
United States207 Posts
December 29 2020 18:49 GMT
#14
That's great. Thank you very much.
vik7
Profile Joined May 2009
United States227 Posts
December 30 2020 12:20 GMT
#15
F for Australian players lol
NA player, go KT Flash, ST Life( ;( ) , IMMvp, EGJD, CMStorm Polt, SKT Rain, KT Zest, Bisu, RootherO, Stats and teamliqiud
Deleted User 291523
Profile Joined December 2012
112 Posts
January 10 2021 00:06 GMT
#16
--- Nuked ---
robksc2
Profile Joined January 2021
3 Posts
Last Edited: 2021-01-10 19:41:32
January 10 2021 19:41 GMT
#17
On December 29 2020 00:27 _fool wrote:
/C netsh advfirewall firewall add rule name="ScBrazil" Dir=Out Action=Block RemoteIP=123.123.123.123(+more IPs)

It's not modifying SC2 files, just reconfiguring the Windows firewall like anyone with the correct commands could.


So doesn't work unless you enable Windows Firewall? Maybe host file edit may be better.
Foxdier
Profile Joined September 2021
2 Posts
July 10 2023 17:48 GMT
#18
--- Nuked ---
JamieRobles
Profile Joined July 2023
1 Post
Last Edited: 2023-07-13 07:38:22
July 11 2023 16:15 GMT
#19
--- Nuked ---
Rescue1
Profile Joined July 2019
6 Posts
January 04 2024 00:26 GMT
#20
Any update on this?
Apparently today the western server changed its IP range
Rescue1
Profile Joined July 2019
6 Posts
Last Edited: 2024-01-05 14:33:45
January 04 2024 00:51 GMT
#21
On December 30 2020 02:28 SC-Shield wrote:
Show nested quote +
On December 30 2020 01:22 Therapist. wrote:
Thanks for doing this!

How do you determine the IP addresses of new servers as they are added?

Since the IP addresses of the servers will change and you may not always be around to update this app, it would be very helpful to be able to determine what the IP's of a given server region are.


Applies to US and KR regions only (EU has only one type of server, EU Central):
First, you need to go to Options -> Language and Region. Then, select "Pick Game Server on Lobby Creation".
Screenshot:
+ Show Spoiler +

[image loading]



This way, when you create a custom game, you will have the following list of servers:
+ Show Spoiler +

[image loading]



Pick server of your interest from that list (e.g. Brazil) and create a game. You could add AI as your opponent. When game is created, run Wireshark (packet sniffer program) and look for UDP traffic. You should see similar exchange of traffic like below:
+ Show Spoiler +

[image loading]



Tip: close as many applications as possible beforehand to reduce noise.
Note: above traffic exchange isn't specific to any game server, I'm unable to host a game at the moment. It's just an example how it could look like.
Required programs: Wireshark - https://www.wireshark.org/

I might create a quick configuration file for next update where people could add IPs manually which will be useful when they change.



Any update on this?
Apparently today the western server changed his IP range

Edit: Here is the list of ip ranges what I could find so far for the Western Server, maybe there is more than this
37.244.3.144
37.244.3.146
37.244.3.148
37.244.3.151
37.244.3.202
37.244.3.208
37.244.3.211
37.244.3.212
37.244.3.214


Can you check it for yourself and, if its possible, update your sc2blocker software? It is very usefull to use
Thanks!
jimminy_kriket
Profile Blog Joined February 2007
Canada5539 Posts
January 04 2024 08:15 GMT
#22
How did you figure out that the server IP's changed?
life of lively to live to life of full life thx to shield battery
Rescue1
Profile Joined July 2019
6 Posts
Last Edited: 2024-01-04 11:40:26
January 04 2024 11:17 GMT
#23
On January 04 2024 17:15 jimminy_kriket wrote:
How did you figure out that the server IP's changed?


When is block, the server its show with 9999ms in the preferred game server menu. Yesterday, Western in my client was with the normal ping, allowing to me create lobbys even when i was manualy bloking that server
jimminy_kriket
Profile Blog Joined February 2007
Canada5539 Posts
January 05 2024 00:32 GMT
#24
Ah makes sense. This program sounds great to avoid Singapore server which for whatever reason is on NA.
life of lively to live to life of full life thx to shield battery
Rescue1
Profile Joined July 2019
6 Posts
January 05 2024 05:32 GMT
#25
It changes again, what could be happening?
CicadaSC
Profile Joined January 2018
United States1985 Posts
January 23 2024 13:03 GMT
#26
do we know if a fix is in the works? hate playing with ping :/
Remember that we all come from a place of passion!!
CicadaSC
Profile Joined January 2018
United States1985 Posts
January 24 2024 12:23 GMT
#27
block vs brazil not working either? aiaiai...
Remember that we all come from a place of passion!!
CicadaSC
Profile Joined January 2018
United States1985 Posts
January 24 2024 14:15 GMT
#28
through some janky reverse engineering and using previous comments as a guide, I've managed to block Brazil, Singapore, and Australia once again. I can't for the life of me figure out how to block US West though. When I try my entire game wont connect to servers at all and I can't log in.
Remember that we all come from a place of passion!!
chrusher97
Profile Blog Joined October 2004
Canada811 Posts
January 24 2024 15:52 GMT
#29
why do i sometimes get australian server even tho i specified I want us central only? Is that a glitch
MJG
Profile Joined May 2018
United Kingdom1451 Posts
January 24 2024 16:06 GMT
#30
On January 25 2024 00:52 chrusher97 wrote:
why do i sometimes get australian server even tho i specified I want us central only? Is that a glitch

If you're in Masters or Grandmasters league then it ignores server preference.
puking up frothing vitriolic sarcastic spittle
CicadaSC
Profile Joined January 2018
United States1985 Posts
Last Edited: 2024-01-25 00:05:23
January 25 2024 00:04 GMT
#31
On January 25 2024 00:52 chrusher97 wrote:
why do i sometimes get australian server even tho i specified I want us central only? Is that a glitch

If you're using the program, the program is out of date. Happens to everyone you gotta use Wireshark and manually grab the IPS and create outbound rules in your firewall to block the usp scopes.
Remember that we all come from a place of passion!!
CicadaSC
Profile Joined January 2018
United States1985 Posts
Last Edited: 2024-01-28 16:05:01
January 28 2024 16:04 GMT
#32
nvm, i got put on brazil again. if there is any way to block these (NA) servers please help me out.
Remember that we all come from a place of passion!!
CicadaSC
Profile Joined January 2018
United States1985 Posts
Last Edited: 2024-01-29 22:41:02
January 29 2024 13:26 GMT
#33
okay so Brazil seems to be the only server which broke through my block. AUS and SING searches still get cancelled. Very strange.

edit: did the wireshark thing again and got brazil blocked again... might just have to make this a daily thing to scan and block the server ip. sigh.... singapore too slipped through. I guess I will just have a 5 minute chore now for every ladder session. It's worth it to have an enjoyable few hours without lag. The things we have to do... sigh... and other RTS are talking about global matchmaking. makes me want to puke. i am incapable of playing with lag because i get so tilted i cant even move my units without breaking concentration from the delayed response.
Remember that we all come from a place of passion!!
HeavenSC
Profile Joined April 2022
25 Posts
February 23 2024 23:42 GMT
#34
What IP did you use to block BR?
HeavenSC
Profile Joined April 2022
25 Posts
February 24 2024 00:04 GMT
#35
Forgive me if this is incorrect, I'm a noob when it comes to this stuff, but I used wireshark to look at everything I was connecting to, hosted a game on BR and I located this IP - 18.228.90.183 - When using whatismyip it comes up as BR so I blocked it, and now I'm not connecting to BR anymore.
jimminy_kriket
Profile Blog Joined February 2007
Canada5539 Posts
February 24 2024 01:43 GMT
#36
Singapore being part of NA server has got to be the dumbest thing ever.
life of lively to live to life of full life thx to shield battery
HeavenSC
Profile Joined April 2022
25 Posts
February 25 2024 01:43 GMT
#37
On February 24 2024 09:04 HeavenSC wrote:
Forgive me if this is incorrect, I'm a noob when it comes to this stuff, but I used wireshark to look at everything I was connecting to, hosted a game on BR and I located this IP - 18.228.90.183 - When using whatismyip it comes up as BR so I blocked it, and now I'm not connecting to BR anymore.



I think there are 2 new BR servers, because I got in a game later. Haven't bothered to check a 2nd time
Cyro
Profile Blog Joined June 2011
United Kingdom20343 Posts
February 25 2024 01:52 GMT
#38
On February 24 2024 10:43 jimminy_kriket wrote:
Singapore being part of NA server has got to be the dumbest thing ever.


This is Blizzard we're talking about, they mixed russia and EU on their other games where people were A: refusing to speak the server language and B: saying nazi stuff all of the time.
"oh my god my overclock... I got a single WHEA error on the 23rd hour, 9 minutes" -Belial88
CicadaSC
Profile Joined January 2018
United States1985 Posts
February 25 2024 01:55 GMT
#39
On February 25 2024 10:52 Cyro wrote:
Show nested quote +
On February 24 2024 10:43 jimminy_kriket wrote:
Singapore being part of NA server has got to be the dumbest thing ever.


This is Blizzard we're talking about, they mixed russia and EU on their other games where people were A: refusing to speak the server language and B: saying nazi stuff all of the time.

is russia not part of eu...?
Remember that we all come from a place of passion!!
Cyro
Profile Blog Joined June 2011
United Kingdom20343 Posts
Last Edited: 2024-02-25 02:05:48
February 25 2024 01:59 GMT
#40
On February 25 2024 10:55 CicadaSC wrote:
Show nested quote +
On February 25 2024 10:52 Cyro wrote:
On February 24 2024 10:43 jimminy_kriket wrote:
Singapore being part of NA server has got to be the dumbest thing ever.


This is Blizzard we're talking about, they mixed russia and EU on their other games where people were A: refusing to speak the server language and B: saying nazi stuff all of the time.

is russia not part of eu...?


They have servers where people are obligated to speak English and servers where people are obligated to speak Russian. They merged the latter into the former and mixed the matchmaking together (for people on the same team and chat/voice channels) with no provisions for having a common language. The amount of abuse that we got from them as women / lgbt+ people was pretty much off the scale as well.
"oh my god my overclock... I got a single WHEA error on the 23rd hour, 9 minutes" -Belial88
WombaT
Profile Blog Joined May 2010
Northern Ireland27289 Posts
February 25 2024 11:46 GMT
#41
On February 25 2024 10:59 Cyro wrote:
Show nested quote +
On February 25 2024 10:55 CicadaSC wrote:
On February 25 2024 10:52 Cyro wrote:
On February 24 2024 10:43 jimminy_kriket wrote:
Singapore being part of NA server has got to be the dumbest thing ever.


This is Blizzard we're talking about, they mixed russia and EU on their other games where people were A: refusing to speak the server language and B: saying nazi stuff all of the time.

is russia not part of eu...?


They have servers where people are obligated to speak English and servers where people are obligated to speak Russian. They merged the latter into the former and mixed the matchmaking together (for people on the same team and chat/voice channels) with no provisions for having a common language. The amount of abuse that we got from them as women / lgbt+ people was pretty much off the scale as well.

That sounds terribly managed, not to mention the unsavoury stuff which sucks.

Maybe not all of their games historically, but surely at least some may have benefitted from a Europe West and a Europe East? Perhaps it’s SC having notable players from there forever altering my perception, and not reflective of the actual player population.
'You'll always be the cuddly marsupial of my heart, despite the inherent flaws of your ancestry' - Squat
HeavenSC
Profile Joined April 2022
25 Posts
March 14 2024 14:09 GMT
#42
Here are all the IPS I was able to find using Wireshark for new brazil servers

18.228.90.183
54.207.104.0/24
15.229.96.172
15.229.96.179
CicadaSC
Profile Joined January 2018
United States1985 Posts
April 11 2024 18:44 GMT
#43
yeah idk why i cant get this to work
Remember that we all come from a place of passion!!
totositenet654
Profile Joined April 2024
1 Post
April 12 2024 10:08 GMT
#44
good
CicadaSC
Profile Joined January 2018
United States1985 Posts
April 12 2024 11:09 GMT
#45
How to block Brazil?
Remember that we all come from a place of passion!!
ProTech
Profile Joined November 2010
United States493 Posts
August 09 2024 08:49 GMT
#46
This program has caused an issue in 2v2, where bots simply run a queue script and block all the servers resulting in games after 4K MMR ( if the bots are loaded ) to not start at all.

CicadaSC
Profile Joined January 2018
United States1985 Posts
July 12 2025 08:46 GMT
#47
does this still work? I am still getting games on brazil and its driving me mad
Remember that we all come from a place of passion!!
_fool
Profile Joined February 2011
Netherlands684 Posts
Last Edited: 2025-07-12 19:52:16
July 12 2025 19:49 GMT
#48
Even if the tool itself no longer works, the Windows-built-in "netsh" command still works, and the syntax looks unchanged. I think it's mostly a matter of finding the IP that you want to block, and insert that in the following command instead of 123.123.123.123:

netsh advfirewall firewall add rule name="ScBrazil" Dir=Out Action=Block RemoteIP=123.123.123.123

(here's the documentation: https://learn.microsoft.com/en-us/windows-server/networking/technologies/netsh/netsh-contexts)
"News is to the mind what sugar is to the body"
HeavenSC
Profile Joined April 2022
25 Posts
July 18 2025 00:13 GMT
#49
Apparently there's some new Brazil servers IP Hushang sent me them

54.67.132.106
54.233.165.118
18.229.151.97
LaughNgamezSOOP
Profile Joined June 2024
68 Posts
July 26 2025 02:50 GMT
#50
Tutorial;

How to setup the great emu wall:

1. Open 'Windows Defender Firewall'.

2. Click on 'Advanced Settings'.

3. Right-click 'Outbound Rules' -> Create new rule.

For the rule you have just created:

-Set the rule type to custom.

-Set the program path to your sc2 executable (try setting it to C:\Program Files (x86)\StarCraft II\Versions\<Latest Base Version>\ ).

-Set Protocol type to Any

-Under scope, add the following REMOTE IP addresses:

103.4.0.0 to 103.4.255.255,

52.67.0.0 to 52.67.255.255,

13.0.0.0 to 13.255.255.255 and 52.180.0.0 to 52.255.255.255

-Set 'Action' to 'Block the connection'.

4. Under 'Inbound Rules', delete all of the SC2 entries (this may not be necessary).

5. Start SC2, but do not click "Allow this program through windows firewall". If you accidentally allow it through,

go back to the previous step and delete the entries again.
Literally the greatest caster ever: https://www.youtube.com/@LaughNgamed
HeavenSC
Profile Joined April 2022
25 Posts
July 26 2025 12:56 GMT
#51
On July 18 2025 09:13 HeavenSC wrote:
Apparently there's some new Brazil servers IP Hushang sent me them

54.67.132.106
54.233.165.118
18.229.151.97

56.125.127.216
one more
ProTech
Profile Joined November 2010
United States493 Posts
July 04 2026 01:28 GMT
#52
This software violates the terms of service, and I have no understanding of why TL.net condones such behavior on their website.

Also, SC-Shield, you never took into account that people would start using this software to sabotage high-level queues by server blocking every server available on the server.

When the player-base starts to shrink at a high level the player pool dwindles, resulting in queueing into the same player over and over and over, and people are using this to prevent matches from starting on ALL servers these days.

User was temp banned for this post.
SC-Shield
Profile Joined December 2018
Bulgaria874 Posts
Last Edited: 2026-07-05 15:43:59
July 05 2026 09:29 GMT
#53
I've updated app.

New version - https://www.mediafire.com/file/x6r5yf6p4t6dhrz/SC2ServerBlocker.zip/file
Source code can be found on the first page. The new version has "Servers" folder where you can edit INI files to add/remove IP addresses manually so you don't have to wait for a new version. However, if you have any other suggestions, please write here or send a PM.

I've added some of IPs you have mentioned here and in another thread. I've skipped LaughNgamezSOOP's IPs for now as they seem a lot to block. Not sure if it's a good idea to block that many, but I can update if someone else confirms these findings.

---

Edit: I made additional changes to app to add/remove IPs from UI. Also, it uses Windows Firewall COM instead of netsh, blocked status if region is already blocked, firewall error if Windows Firewall is turned off, etc. UI is a bit different, so if you feel you want to try the latest:
https://www.mediafire.com/file/l1nloihnlk9fjgb/SC2ServerBlocker.zip/file

Screenshots:
+ Show Spoiler +

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