Question

Linksys ADSL2 Gateway with 4-Port Switch AG241/EU FTP Problem

Asked by: Antiparadox

A friend of mine has the router from my topic, and he wants to set up an ftp server, but he has to make rules for that in his router to allow this traffic, the only problem is when he does that it doesn't work for people like me who are trying to connect and are also behind a router. The main problem is, when he for example wants his server to run on port 3334 and he sets it up in there, I who am also behind a router can connect if I allow outbound port 3334 on his server IP, and it seems to be logging in and working, but right after logging in, it will go to,

[R] Opening data connection IP: 211.211.180.214 PORT: 55715

and thats where it goes wrong, cuz it doesn't stay on port 3334, and because it doesn't I cannot connect cuz I only allow port 3334 outbound in my router so I can connect to his server. I can log in and retry every time and every time, it will list a different data port,

[R] Opening data connection IP: 213.211.190.204 PORT: 6668
or
[R] Opening data connection IP: 213.211.190.204 PORT: 17551

etc etc etc

So in order for me to connect to his server successfully I would literally have to open every single port from 0-65535, and that certainly is not the way this should be done.

So the question is, how does he have to make these rules in his router in order for me to connect to port 3334, and 3334 alone. That data connection should stay on that port.

Regards,

Antiparadox

PS : Detailed explanation for his exact model and what he should do step by step is highly appreciated, person helping me in such a way to make it work gets full credit.

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Asked On
2007-09-05 at 11:57:47ID22808860
Tags

linksys

Topics

Network Routers

,

Networking Hardware Firewalls

,

Consumer Firewalls

Participating Experts
2
Points
500
Comments
11

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Answers

 

by: weareitPosted on 2007-09-05 at 12:38:23ID: 19835138

What FTP software is he using?  It sounds like passive mode is enabled.

-saige-

 

by: AntiparadoxPosted on 2007-09-05 at 12:41:06ID: 19835161

Well my friend is the one hosting the ftp server(he's using Gene6) and the one with that linksys router, and I am the one trying to connect to his server. Should he disable passive mode from within his ftp server program or what? Also can he use AUTH SSL if he disables passive mode from within his ftp server program?

 

by: weareitPosted on 2007-09-05 at 13:50:42ID: 19835688

Passive mode is what is switching the backend ports.  I would disable passive mode and use AUTH SSL.

-saige-

 

by: AntiparadoxPosted on 2007-09-05 at 14:08:22ID: 19835824

Gonna have him turn off passive then, and see if it works, brb!

 

by: AntiparadoxPosted on 2007-09-05 at 14:24:06ID: 19835919

Doesn't seem to work, he turned off passive in his client but I still can't get further than a few lines, and the actual dirlisting doesn't pop up. Its not my router, cuz I opened it up completely at first to test if it wasn't my end, and it isn't, so its entirely his router blocking shit.

 

by: AntiparadoxPosted on 2007-09-05 at 14:39:03ID: 19836014

Nope still ain't working, getting a little further but now with passive disabled it says cannot list for (then it states my NAT ip)only lists to (and then it states my external internet IP).

So that server of his all of a sudden wants my external IP, but its getting my internal IP and it isn't accepting that.

 

by: RobWillPosted on 2007-09-09 at 19:16:00ID: 19858597

Have you tried using the standard port of 21? One working you can try and move and adjust for the dynamic reply ports.

 

by: AntiparadoxPosted on 2007-09-10 at 03:25:55ID: 19859859

yeah port 21 works on his router, but take other ports and it no longer works, even when he makes rules referring  to this new port. Somehow the default ftp port doesn't give that much hassle, but he really would like to have it on another port, preferably port 3333.

 

by: RobWillPosted on 2007-09-10 at 07:39:56ID: 19861260

FTP replies on random ports, normally in the area above 1000. Changing the default "listening" port may change that range to be higher. Does he have outgoing ports blocked above 1100? If so this may be the issue. No need to un-block incoming, except forwarding your listening FTP port.
Switching to Active mode may help this, but not sure due to the port range:
http://slacksite.com/other/ftp.html

 

by: AntiparadoxPosted on 2007-09-10 at 07:48:26ID: 19861336

ok will give him this info so he can try it later, thnx

20120131-EE-VQP-002

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