[Jackol1234]

Hey,

I host four CSGO servers from a rented NFO VDS. Recently, I have been having this error on all my servers randomly and it'll lag the server for about 15 seconds and then drop clients. Here is the error:

PHP Code:

SendNetMsg 131.183.244.176:27005: stream[(null)] buffer overflow (maxsize = 4000)!
SendNetMsg 68.186.219.163:27005: stream[(null)] buffer overflow (maxsize = 4000)!
SendNetMsg 70.199.198.23:9418: stream[(null)] buffer overflow (maxsize = 4000)! 


It spams those 3 lines over and over until clients are forced disconnected and then it shows:

Dropped NeMo from server: Disconnect STEAMAUTH: Client Garlic Bread received failure code 6 Dropped Garlic Bread from server: No Steam logon STEAMAUTH: Client Clam Slam received failure code 6 Dropped Clam Slam from server: No Steam logon Net channel ratelimit exceeded for 131.183.244.176:27005: 691 packets rejected.

I have looked in other threads but haven't found a definitive answer on how to fix it.

Here are my server specs:

OS - Windows Server 2012 R2 64-bit CPU - Intel Xeon CPU E5-2690 v2 @ 3.00GHz (we have 6 cores) RAM - 6GBs Game - CSGO Tickrate - 102 tick

SM and Meta versions:

SourceMod Version Information: SourceMod Version: 1.7.3-dev+5302 SourcePawn Engine: SourcePawn 1.7, jit-x86 (build 1.7.3-dev+5302) SourcePawn API: v1 = 4, v2 = 6 Compiled on: Mar 21 2016 12:44:44 Built from: https://github.com/alliedmodders/sou...commit/617c4fb Build ID: 5302:617c4fb http://www.sourcemod.net/ Metamod:Source version 1.10.7-dev Built from: https://github.com/alliedmodders/met...commit/ff9eac3 Build ID: 952:ff9eac3 Loaded As: Valve Server Plugin Compiled on: Dec 22 2015 Plugin interface version: 15:14 SourceHook version: 5:5 http://www.metamodsource.net/

Plugins:

[SM] Listing 46 plugins: 01 "Admin File Reader" (1.7.3-dev+5302) by AlliedModders LLC 02 "Admin Menu" (1.7.3-dev+5302) by AlliedModders LLC 03 "adminWatch" (1.2.7) by Pat841, DoPe^, fixed by DeweY 04 "AFK Manager" (4.0.5) by Rothgar 05 "Always Weapon Skins" (2.2.4) by Neuro Toxin 06 "Basic Chat" (1.7.3-dev+5302) by AlliedModders LLC 07 "Basic Comm Control" (1.7.3-dev+5302) by AlliedModders LLC 08 "Basic Commands" (1.7.3-dev+5302) by AlliedModders LLC 09 "Basic Info Triggers" (1.7.3-dev+5302) by AlliedModders LLC 10 "Basic Votes" (1.7.3-dev+5302) by AlliedModders LLC 11 "CallAdmin" (0.1.5) by Impact, Popoklopsi 12 "CallAdmin: Mysql module" (0.1.5) by Impact, Popoklopsi 13 "CallAdmin: Steam module" (0.1.5) by Impact, Popoklopsi 14 "[ckSurf] Teleport Destination Finder" (1.00) by Elzi 15 "ckSurf" (1.18) by Elzi 16 "ckSurf Restarter" (1.0) by DeweY 17 "Client Preferences" (1.7.3-dev+5302) by AlliedModders LLC 18 "Dewster's Consolidated Plugins" (1.2) by DeweY 19 "[CS:GO] Gun Menu" (1.2) by LumiStance (adapting by Grey83) 20 "Custom Votes" (1.9) by ReFlexPoison 21 "Donator Door Man" (1.5) by DeweY 22 "Equipment Drop" (1.8) by Trostal 23 "Help Menu" (0.6) by DeweY 24 "Knife Swapper" (1.6.4) by Neuro Toxin 25 "MapChooser" (1.7.3-dev+5302) by AlliedModders LLC 26 "Map Nominations" (1.7.3-dev+5302) by AlliedModders LLC 27 "Reserved Slots" (1.7.3-dev+5302) by AlliedModders LLC 28 "Rock The Vote" (1.7.3-dev+5302) by AlliedModders LLC 29 "Rules Menu" (0.5) by DeweY 30 "SourceBans Checker" ((SB++) 1.5.4.4) by psychonic, Ca$h Munny, Sarabveer(V EERΓäó) 31 "SourceBans: Admin Config Loader" ((SB++) 1.5.4.4) by AlliedModders LLC, Sa rabveer(VEERΓäó) 32 "TOP SECRET" (1/2/2016) by D---Y 33 "seDirector" (2.4) by Asher Software 34 "Self-Mute" (1.0) by Otokiru 35 "Server Advertisement" (2.4b) by ESK0 36 "Server lister" (0.5) by DeweY 37 "SM SKINCHOOSER" (3.0) by Andi67 38 "Sound Commands" (1.7.3-dev+5302) by AlliedModders LLC 39 "SourceBans++" (1.5.4.4) by SourceBans Development Team, Sarabveer(VEERΓäó) 40 "SourceComms" ((SB++) 1.5.4.4) by Alex, Sarabveer(VEERΓäó) 41 "SourceSleuth" ((SB++) 1.5.4.4) by ecca, Sarabveer(VEERΓäó) 42 "Surf bug fix" (1.1) by mev 43 "Terms Agreement" (1.5) by MaTTe (Updated by DeweY) 44 "TOGs Chat Tags" (4.4.4) by That One Guy 45 "Triggers" (2.3.0) by theY4Kman 46 "Web Shortcuts CS:GO version" (2.4) by Franc1sco franug and James "sslice" Gray

If you need any more info please just ask. Thanks for any help!

[Darkness_]

Read through this

[Jackol1234]

Originally Posted by Darkness_ Read through this

This is the thread I originally found and have tried the rates fix but my server is already set up like he suggests and I don't have CSSDM on my server as it's just a surf server.

Edit: Also, I had a normal gameserver from NFO before I switched to the VDS to open up more game servers and I never had this issue with the same plugins.

Here are the rate settings from my server.cfg file:

fps_max 0 sv_minrate 128000 sv_maxrate 0 sv_maxupdaterate 128 sv_minupdaterate 128 sv_maxcmdrate 128 sv_mincmdrate 128

[Neuro Toxin]

This is a new exploit!!!

I just banned a user by matching the ip in the logs who was active on one of my servers.

As soon as they got d/c'd the attack stopped.

http://sourcebans.aus-tg.com/index.p...steamid&Submit

[Jackol1234]

Originally Posted by Neuro Toxin This is a new exploit!!! I just banned a user by matching the ip in the logs who was active on one of my servers. As soon as they got d/c'd the attack stopped. http://sourcebans.aus-tg.com/index.p...steamid&Submit

Wait, what? You're saying this is an attack on the server? It only happens for about 15 seconds and then everyone gets DC'd. What kind of exploit is it and what can come of it?

[Maxximou5]

Originally Posted by Darkness_ Read through this

I think this is different.

Originally Posted by Neuro Toxin This is a new exploit!!! I just banned a user by matching the ip in the logs who was active on one of my servers. As soon as they got d/c'd the attack stopped. http://sourcebans.aus-tg.com/index.p...steamid&Submit

If this is an attack, I started doing this attack to myself on accident about an hour ago doing some plugin testing.

[Neuro Toxin]

I have identified this a few more times going to through logs.

SendNetMsg 70.199.198.23:9418: stream[(null)] buffer overflow (maxsize = 4000)!

I get lots of similar stuff on surf/bhop for max speeds being clamped, but have never seen 'stream[(null)]'

In my cases, the server doesn't crash, but it spikes CPU usage causing variance lag spikes.

It's obviously an exploit because the client floods the fuck out of the server when it occurs.

[Darkness_]

Are you sure that is due to an exploit? This crash happened on one of my servers about 20 minutes ago ( it happens once every few days ) and the person who was linked to the IP address in the SendNetMsg message is just some little kid who is a long time regular.

PHP Code:

SendNetMsg ********:27005: stream[(null)] buffer overflow (maxsize = 4000)! 


Edit: I just sent you a friend request on steam, Neuro. If you would like some more details.

[Jackol1234]

Originally Posted by Neuro Toxin I get lots of similar stuff on surf/bhop for max speeds being clamped In my cases, the server doesn't crash, but it spikes CPU usage causing variance lag spikes.

Could this be happening due to the ckSurf timer? That is exactly what is happening to me. It'll just lag the server for about 10-15 seconds and some people will lose connection and get dropped while others will be able to stay, but either way it's extremely disruptive and I'd like to solve it.

[Maxximou5]

Yeah, was able to replicate this but continuous replication isn't happening yet.
This isn't plugin dependent, current specs where I am able to replicate this on:
Distro: Debian
CS:GO Version: 1.35.3.0/13530 314/6339 secure
SourceMod Version: 1.7.3-dev+5292
Metamod:Source version 1.10.7-dev
Plugins:

"Basic Info Triggers" (1.7.3-dev+5292) by AlliedModders LLC
"Fun Commands" (1.7.3-dev+5292) by AlliedModders LLC
"Basic Votes" (1.7.3-dev+5292) by AlliedModders LLC
"Sound Commands" (1.7.3-dev+5292) by AlliedModders LLC
"Admin Help" (1.7.3-dev+5292) by AlliedModders LLC
"Basic Comm Control" (1.7.3-dev+5292) by AlliedModders LLC
"Admin Menu" (1.7.3-dev+5292) by AlliedModders LLC
"Anti-Flood" (1.7.3-dev+5292) by AlliedModders LLC
"Player Commands" (1.7.3-dev+5292) by AlliedModders LLC
"Basic Chat" (1.7.3-dev+5292) by AlliedModders LLC
"Basic Commands" (1.7.3-dev+5292) by AlliedModders LLC
"Admin File Reader" (1.7.3-dev+5292) by AlliedModders LLC
"Client Preferences" (1.7.3-dev+5292) by AlliedModders LLC
"Fun Votes" (1.7.3-dev+5292) by AlliedModders LLC