Hi there.
Don't know if this should be posted here or in Linux-software forum, but I still consider myself a n00b, so here goes. First off, brief summary of my problem.

Azureus starts out strong on my linux box, well, kind of strong, 32kb/s to 50kb/sec, and then after a few minutes, it drops down to a pitiful 300 b/s average. I took a screenshot, but cannot upload it, or don't know how. anyways, from looking at the statistics, it is "pulsing" (only word I can explain it with) up to 4 kb/s and then dropping out completely for a few mins then back up again. so the d/l looks like this |_|_|_|_|_| if that makes sense as a graph. I am also getting all green smileys with Azureus, and the NAT test comes back as good. I have searched all over for help, and haven't found anything that addresses this problem.

ok, now for my configuration at home.

I am running a small network here.... 2 windoze comps (XP sp2) and one Zod box. Using a Smoothwall for my router, connected to a 10mb/s down 1mb up cable connection. All the computers work fine, and the stupid XP boxes are getting insanely fast speeds... like over 1mb/s on good torrents, and this is even saving the files to the linux box. (my Zod box is used for file storage for the whole network, as well as my machine. The other users aren't that savvy on d/l so, I am usually the one who does the most) anyways, even with the two XP boxes off, and the Zod box running, still have the same issue. I have a feeling it is something with linux (Fedora) itself, but not entirely sure. Also, for more info, both SELinux and the included firewall on the linux box if disabled, using the smoothwall for all my firewalling needs.

sorry for the long rambling post, but I hope I have explained things sufficiently. if someone can solv this, they will be my new best friend, and I might even buy them a brand new puppy. lol.

look in /var/log/syslog for lots of packets / messages

otherwise are you sure bottom right hand side corner (righ click)
that you have not limited the upload capacity)
You cannot only download, you need to share and upload

There are also optimum depending on RAM/Pc and available
bandwitdh as to the the settings (No of connections, no of uploads,
no of torrents)
Just google for more info on this

Emmanuel_uk, thanks for your quick reply. a bit more info for you. When I configured Azureus, I used the pulldown settings for asdl/cable 512 kb (the largest I could find, so upload speed is capped at 110 kb/s.... as for /var/log/syslog.... ummm, I don't have tha file there. lol I understand the logic behind it... and maybe I am just not understanding where it might be on my system.... sorry for my n00biness.... I know it can be frustrating talking to someone with a linux IQ of that of a small cabbage... but, lol I am trying. anyways, I will try googling for where it might be located, and see what I can find.... any othe info is greatly appreciated.

you need to be root to access it, type
su then password (or sudo whatever, I am not clued about fc6)
definetely in /var/log but could be another name

try in a terninal as root
tail -f /var/log/syslog
will display as it grows

110 upload is too high
you are confused between bits and bytes?
connection is asymetric
Upload is usually between 1/4 and 1/10 of dwld
so say 512 kbits/4/8, you should choose upload limit of 16 kbytes/s
not 110!

Well, I figured out what it was.....
(cue sinister music)

my cable company has started packet shaping. GRRRRR meaning that my packets were getting throttled.... selected transport encryption, and boom, downloads started right up. I rechecked on one of my windows machines, and sure enough, same problem there too... slow downloads.... so, turned on encryption, and everything is working again. Thanks again for your help... I did set my upload speed down a bit... about 10 per comp... that way, at max, if all three are d/l i'll hit 30 across the entire network. Again, I appreciate all your help, and as I figure out one problem, three more crop up, lol but that is for another forum... and only then after I have exhausted all the rest of my options... I hope to attain enough knowledge to start giving back to the community.... but at the moment, I am keeping my suggestions to myself (will do more harm that good at the moment)

What is that? I mean is this available in azureus?

I suppose using another port than 6881 would have done
the trick as well (maybe)

under the Connections tab in options, there is a section called transport encryption. basically it encrypts all the outgoing packets, and has settings for incoming ones as well, also fallback options. prevents the ISP's routers from seeing what data is in the packets, and prevents them from throttling them (until they change thier rules of course, to throttle all encrypted packets, too, lol). Not to get on a soapbox here, but packet shaping is like saying that since someone got in an accident in thier car, no one else can drive. Anyways, it seems to have fixed it. Lol now my next big puzzle will be getting my brain around Quality of Service, so that I can keep everything flowing around the downloads.... but, that is for another day (after I sleep.)

one other thing... I noticed you mentioned using another port besides 6881... it was my understanding that all of the prots were in the 20000+ range... at least that is what azureus stated when it started.... and I assumed (bad idea, I know) that those were the prots I was using..... but if there are specific ports is uses on my end that could have been changed, I may play with that, and see. I would prefer using un-encrypted if I can get away with it (more people to choose from, as well as less cpu use)

I think you can use any port you want, a higher port usually, you are right, because ISP look less at those?

That's what I understood. Anyways, seems to work ok now.