Ports connection refused

English Network/Internet
#1

Hey, I having trouble with a gaming bot that I recently installed on a freshly built OpenSuse 11.1 rig. I’m probably overlooking something obvious, because OpenSuse is not an OS I’ve used all that much. But here goes:

I had this bot running on my vista rig, works fine to host games. When I compiled it on OpenSuse it can’t host any games. I’ve forwarded all the right ports (via my Dlink router) to my OpenSuse rig and went the additional step of completely disabling the firewall (though the “Configure a Firewall” in the menu). Still, when the bot is running I pull up Open Port Check Tool I get “connection refused” for all the ports I need.

Any help? Thanks

#2

First of all make sure your firewall is disabled.

iptables -L -vn

should give something like

Chain INPUT (policy ACCEPT 25323 packets, 21M bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 25294 packets, 4586K bytes)
 pkts bytes target     prot opt in     out     source               destination

Then check whether you have the ports open on your SuSE box with

netstat -lnt
#3 
aaron@linux-xsf0:~/ghost> su
Password:
linux-xsf0:/home/aaron/ghost # iptables -L -vn
Chain INPUT (policy ACCEPT 31379 packets, 5329K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 30693 packets, 8871K bytes)
 pkts bytes target     prot opt in     out     source               destination
linux-xsf0:/home/aaron/ghost # netstat -lnt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN
tcp        0      0 :::139                  :::*                    LISTEN
tcp        0      0 :::111                  :::*                    LISTEN
tcp        0      0 :::22                   :::*                    LISTEN
tcp        0      0 ::1:631                 :::*                    LISTEN
tcp        0      0 :::445                  :::*                    LISTEN
linux-xsf0:/home/aaron/ghost #

I really don’t know what the point of that second command was or what it tells me, I’m sorry, still a n00b. Can you help me decode that?

#4

Hi,

The local address column lists the ports that your OpenSuSE box is listening for connections on.

So as an example

0.0.0.0:22 will equate to accepting connections on all local interfaces for port 22 (ssh). This port is opened up by starting the SSHD daemon.

To match the list of port numbers tro actual services take a look in the services file under /etc.

i.e: less /etc/services

You will see a description of the service name and port number used for that service.

hth
J

#5

Ok, that makes sense. So now how do I get my box to listen to the ports I wants? Specifically between the 6112-6119 range. Thanks

#6

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Start a service made to listen on those ports. You can also do it
manually with a general TCP tool like netcat (great tool, comes w/SUSE)
with the following syntax (one per port):

netcat -l -p 6112

Note that just listening on a port for fun doesn’t net you much, but if
you had a service listening there then it makes more sense; on the other
hand, telling the server to listen isn’t something you usually need to do
on your own as it happens when the service starts (or else the service
would have no networking purpose).

Good luck.

Airdawg10 wrote:
> Ok, that makes sense. So now how do I get my box to listen to the ports
> I wants? Specifically between the 6112-6119 range. Thanks
>
>
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