Re: [Shorewall-users] Issue Connection to Steam based games

Jesse Toninger Thu, 17 Apr 2014 16:28:18 -0700

Hi Eric,

That IP is the IP of the server for the game I am trying to connect to. I know it is accepting connections because the people in my party can connect and I cannot, and I know none of them have opened any ports in that range.

However in the interest of troubleshooting, before I wrote for help I did open ports in the range of 27000 to 28000.

I then used a UDP testing utility and an offsite webserver I have access to, in order to verify that I can both send and receive udp packets along those ports, directly to and from my desktop machine.

So udp packets can be sent and received, yet for some reason I still cannot connect to these servers along those same ports when others can.

Thank you Eric I appreciate your patience.‎ Please let me know if you have any next steps or want me to verify anything.

Thanks

Jesse

From: Eric Teeter

Sent: Thursday, April 17, 2014 6:48 PM

To: Shorewall Users

Reply To: Shorewall Users

Subject: Re: [Shorewall-users] Issue Connection to Steam based games

Jesse:

I did notice that your error message:

780.539: Sending UDP connect to public IP 146.66.155.75:27086

Is trying to go through port UDP 27086 you might check to see if that is open from the out side, there are websites that check port openings.

Eric

From: "Jesse Toninger" <[email protected]>
To: "Shorewall Users" <[email protected]>
Sent: Thursday, April 17, 2014 4:40:06 PM
Subject: Re: [Shorewall-users] Issue Connection to Steam based games

Thank you Eric.

I have done so already and our setups are largely identical. Everything but our Rules file is identical and none of the Ports he has opened are related to Steam. I have tested this to be sure.

I have access to his machine and could forward along a dump file from his machine as well.

The only real difference is that in an effort to troubleshoot the issue I opened the ports recommended by Steam but he never had to do that. The main difference between our setups is he is running version 4.4.17 and I am running 4.4.26.1.

Thank you for your reply.

Jesse

On 17 April 2014 17:16, Eric Teeter <[email protected]> wrote:

Jesse:

I would compare all your file(s) setting against your friends that works and see what is missing/incorrect.. I would print out on paper both then use the sheets to manually compare them.

I find that making macros for opening port for a specific application easier for debugging problems like this.

Eric

Hope this helps!

From: "Jesse Toninger" <[email protected]>
To: [email protected]
Sent: Thursday, April 17, 2014 3:43:25 PM
Subject: Re: [Shorewall-users] Issue Connection to Steam based games

I do not know if anyone has seen this request yet, I sent the below in a few days ago. I just wanted to send an updated dump file taken right after experiencing the issue, packaged this time as per instructions.

Thank you

Jesse

On 14 April 2014 22:04, Jesse Toninger <[email protected]> wrote:

Hi Shorewall people,

I Have been using Shorewall for a few years now. I am fairly familiar with the basics but this issue has me stumped. Games that are accessed via Steam (Specifically Dota 2 and TF2) No longer work for me.

Before I say anything else, these games both work when I bypass the firewall and plug my machine directly into my modem.

I have attached my Dump file and my Rules file just in case they might be of value.

One of the reasons I have been unable to troubleshoot this issue on my own is that I cannot find any actual error messages. Everything seems to be running as expected but I still cannot connect to these games.

An interesting illustration of this issue is as follows:

Here is the standard timeout and retry from the Dota2 console:

780.539: Sending UDP connect to public IP 146.66.155.75:27086
Retrying

And this entry from syslog indicating the successful outgoing packet send:

Apr 14 15:24:34 Jesse-Linux kernel: [ 2910.148014] Shorewall:loc2net:ACCEPT:IN=eth0 OUT=eth1 MAC=90:fb:a6:3c:b3:03:00:23:54:91:05:53:08:00 SRC="" DST=146.66.155.75 LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=8310 PROTO=UDP SPT=27005 DPT=27086 LEN=28

But I can find no evidence of a return packet or drop.

For a bit of anecdotal background, I know the issue is not with the specific Dota servers because I was trying to lay with friends, one of whom also runs Shorewall, and he was able to get into the game without issue.

So it seems as though packets are going out but they are not able to to return.

Please help if you can, I am sure some of you are gamers as well and you can imagine how while this may not be mission critical it is frustrating. I will provide any more information that may be required to sort this out.

Thanks

Jesse

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