P2P Connections refused - what do I have to fix?

[boothruwindow]

How does this work - I can do anything on the web, and my Synaptic connection works, but P2P connections through programs provided by Ubuntu are "refused"?

I have just made a clean installation with Ubuntu 8.1, and the only program which I've installed since is KMLDonkey (from Synaptic). I had thought that my firewall in a previous installment had something to do with this, but without that I'm still getting my connection attempts "refused". Is there a known port-forwarding issue? I'm new to Linux, I know nothing about standard ports, nor how to control them, and sure would like to know where a good primer on this subject exists, even if this isn't the cause of my P2P connection problems. Anybody seen this sort of problem in Ubuntu Linux? Please help!

Thanks.
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[bigtomrodney]

Have you forwarded the correct ports from your router to your PC? That will allow outside peers to connect to you.

Check out this site for help
PortForward.com - Free Help Setting up Your Router or Firewall

[boothruwindow]

Have you forwarded the correct ports from your router to your PC? That will allow outside peers to connect to you.

Check out this site for help
PortForward.com - Free Help Setting up Your Router or Firewall

Router? What router? As for firewall, if you mean that, I have not added one to the current installation, unless there is a hidden default one which I'd need to access from the command line. If so, how does that work?

Btw, is there a source which explains how devices use ports to communicate? Somehow this has been one of those concepts which the basic tutorials protect the newbies from, so that it's always been over my head, while most discussions I see presume like I already understand it all. I'm sure it's not that difficult, but I sure would like to know how many ports there are, why so many, and why or if they are frequently switched.

Thanks.

[rcgreen]

The first thing to determine is whether your
computer is "refusing" to talk to remote hosts,
or are they refusing to talk to you.

Give us the exact error message you are getting.

[boothruwindow]

The first thing to determine is whether your
computer is "refusing" to talk to remote hosts,
or are they refusing to talk to you.

Give us the exact error message you are getting.

I'm afraid that will have to wait for tonight (arrrr), and I will check it when able, but I'll bet it's my computer which is refusing - the tools involved (tried two others before I did a clean install) are all from the Ubuntu server repos, or distributed specifically for Ubuntu, so unless they're sometimes known to distribute software for servers which have been shut down...I'll let you guys, who know this stuff decide that, and I really appreciate any help you can give.

Just so that I'll know, I had seen a reference to Firestarter (which I had suspected at first) as just a GUI for the firewall - does this mean that Ubuntu installs a default command-line firewall?

[reed9]

Ubuntu has iptables installed by default. https://help.ubuntu.com/community/IptablesHowTo

[boothruwindow]

Router? What router? As for firewall, if you mean that, I have not added one to the current installation, unless there is a hidden default one which I'd need to access from the command line. If so, how does that work?

Btw, is there a source which explains how devices use ports to communicate? Somehow this has been one of those concepts which the basic tutorials protect the newbies from, so that it's always been over my head, while most discussions I see presume like I already understand it all. I'm sure it's not that difficult, but I sure would like to know how many ports there are, why so many, and why or if they are frequently switched.

Thanks.

I just made another connection attempt, and here is the error message - hmmm...:

"Disconnected. Connection to the core was refused. Are you sure it was running?"

Does that tell anything?

[reed9]

According to the comments here: KMLDonkey KDE-Apps.org You must have mldonkey installed as well, and looking at the ubuntu package (Ubuntu -- Details of package kmldonkey in intrepid), it doesn't pull it as a dependency. Do you have it installed?

[boothruwindow]

According to the comments here: KMLDonkey KDE-Apps.org You must have mldonkey installed as well, and looking at the ubuntu package (Ubuntu -- Details of package kmldonkey in intrepid), it doesn't pull it as a dependency. Do you have it installed?

I have only what I could get from Ubuntu through Synaptic. There were other P2P programs available, including Murmur (also didn't work), which I tried before giving up on the last installation, but only the one Donkey product.

So, I have at this point not installed anything other than web flash and KMLDonkey - haven't even done the long update yet, which I guess I should do. I haven't touched iptables either. Given the above, do you think it could be just another more program that I need to install (and I had worried I would have to spend the next month learning how to set port configurations)...oh, wait a sec, here is the actual Synaptic abstract which I didn't quite understand earlier:

KMLDonkey is an advanced GUI frontend for the MLDonkey P2P core.
KMLDonkey helps integrate the MLDonkey P2P software into KDE. It provides a
replacement GUI using the KDE framework, ED2K link handling in Konqueror, a
Control Centre module for configuring MLDonkey and client connectivity, and a
panel applet for Kicker that displays MLDonkey status and can launch the GUI
on demand.


What, KDE, one of the other desktop environments? My installation is plain Ubuntu (not Kubuntu, which I know is built on the old GNOME! So, does this rule out the program for GNOME, and will I need to switch to KDE to use p2p?

[boothruwindow]

According to the comments here: KMLDonkey KDE-Apps.org You must have mldonkey installed as well, and looking at the ubuntu package (Ubuntu -- Details of package kmldonkey in intrepid), it doesn't pull it as a dependency. Do you have it installed?

I have only what I could get from Ubuntu through Synaptic. There were other P2P programs available, including Murmur, which I also tried before giving up on the last installation (also didn't work), but only the one Donkey product.

So, I have at this point not installed anything other than web flash and KMLDonkey - haven't even done the long update yet, which I guess I should do. I haven't touched iptables either. Given the above, do you think it could be just more software that I need to install (and I had worried I would have to spend the next month learning how to set port configurations)...oh, wait a sec, here is the actual Synaptic abstract which I didn't quite understand earlier:

KMLDonkey is an advanced GUI frontend for the MLDonkey P2P core.
KMLDonkey helps integrate the MLDonkey P2P software into KDE. It provides a
replacement GUI using the KDE framework, ED2K link handling in Konqueror, a
Control Centre module for configuring MLDonkey and client connectivity, and a
panel applet for Kicker that displays MLDonkey status and can launch the GUI
on demand.

What, KDE, one of the other desktop environments? My installation is plain Ubuntu (not Kubuntu, which I know is built on the old GNOME! So, does this rule out the program for GNOME, and will I need to switch to KDE to use p2p?