[RndTbl] port forwarding

[Gilbert E. Detillieux]

According to Mel Seder:
> Id like to use the following services and forward the applicable ports.  I
> used to know the password to my router softwear at 192.168.0.1 but I don't
> anymore.   I thought I did but it doesn't look I do.

You may have to do a reset on the router box, then, to restore factory
defaults, which means you'd have to reconfigure all the settings you had
changed previously.

> Part of my problem is that bittorrent seems to be running along fine and then
> all of sudden the speed starts dropiing toward zero and eventually stops
> working (even a Control-C) doesn't exit the app.  However if I remove and
> restore power to my router the download seems to magically start working again.
>  So I figured I'd see if there was newer router firmware and specifically open
> up Bittorrent ports at the same time.
> 
> Would you please let me know the ports for the following and any other items
> you think might me useful?
> 
> FTP
> SSH

You'd only need to configure these if you want to allow FTP and SSH
connections _in_ to a system behind the router.  SSH is easy: it's tcp port
22.

FTP uses tcp port 21 for the control connection, and port 20 for the data
connections, assuming you're using active-mode FTP.  Since many FTP clients
now use passive-mode FTP by default (to make it easier to work when going
_out_ through a NAT-based router), you might have to enable an additional
range of ports to allow for passive connections.  Depending on which FTP
server you set up, there may be a way to limit it to a particular range of
ports for passive connections, which should (of course) match the settings
on the router.

> Bittorrent

According to the URL I provided earlier...

http://torrent.dulug.duke.edu/

"Open up ports 6881-6999/tcp so other clients can contact you for bits"

I would assume this is the only port range you need to open up on the router
to fix the bittorrent problem.

> If you know of a well done sight that lists other common ports would you
> please send me the URL.

Well, I usually consult /etc/services first, but not all of the ports you
might want to know about will be listed, and those that are there may not be
very well understood, since there's no description or reference info.

Here are URL's to some sites I've come across, which may be of use...

TCP/IP Common Ports (from MyServer.org Dynamic DNS Services)
	http://www.myserver.org/help/ports.asp

TCP/IP Ports for Internet Services
	http://www.chebucto.ns.ca/~rakerman/port-table.html

Ports for Internet Services
	http://www.eviescreations.com/ports.htm

Linnet Firewall TCP Ports
	http://www.linnetsol.co.uk/port-filter.asp

Internet Services by Port Number
	http://www.graphcomp.com/info/specs/ports.html

DoorStop Port List
	http://www.opendoor.com/doorstop/ports.html

TCP/IP Services
	http://bfs-test.acns.fsu.edu/Network/portDescription.shtml

Port Numbers for Port Forwarding
	http://kbserver.netgear.com/kb_web_files/n100495.asp

No single list I've found is exhaustive, but by looking at a few, you're
likely to find a decent description of whatever port numbers you're looking
for.

-- 
Gilbert E. Detillieux		E-mail:	<gedetil at cs.umanitoba.ca>
Dept. of Computer Science	Web:	http://www.cs.umanitoba.ca/~gedetil/
University of Manitoba		Phone:	(204)474-8161
Winnipeg, MB, CANADA  R3T 2N2	Fax:	(204)474-7609