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Author Topic: FTP port forwarding problem  (Read 12172 times)

sgip2000

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FTP port forwarding problem
« on: April 02, 2009, 06:50:16 AM »
I have a DIR-825 with a DNS-323 NAS connected to it and am unable to access the FTP server on the DNS-323 remotely while connected to the DIR-825.  I am able to access the FTP server when using 2 other routers though.

I have public port 21 being forwarded to private port 21 on the DNS-323 on all routers.

Anyone have any suggestions?

Thanks.
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arod

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Re: FTP port forwarding problem
« Reply #1 on: April 02, 2009, 08:45:07 AM »
Disable the Port Forwarding rule you created and apply it in Virutal Server.
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sgip2000

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Re: FTP port forwarding problem
« Reply #2 on: April 02, 2009, 09:19:08 AM »
Quote from: Ru-Fi-Oh on April 02, 2009, 08:45:07 AM
Disable the Port Forwarding rule you created and apply it in Virutal Server.

I've tried it both ways.
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smlunatick

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Re: FTP port forwarding problem
« Reply #3 on: April 02, 2009, 11:30:57 AM »
I believe that FTP may also require port 20.
« Last Edit: April 02, 2009, 01:38:36 PM by smlunatick »
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Lycan

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Re: FTP port forwarding problem
« Reply #4 on: April 02, 2009, 01:34:21 PM »
Is it passive or active FTP?
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sgip2000

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Re: FTP port forwarding problem
« Reply #5 on: April 02, 2009, 02:09:07 PM »
Quote from: Lycan on April 02, 2009, 01:34:21 PM
Is it passive or active FTP?

I've tried it both ways.  Neither work.
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sgip2000

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Re: FTP port forwarding problem
« Reply #6 on: April 02, 2009, 02:10:29 PM »
Quote from: smlunatick on April 02, 2009, 11:30:57 AM
I believe that FTP may also require port 20.

I believe this is the problem.  Unfortunately, the DIR-825 only has the option to forward port 21.
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smlunatick

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Re: FTP port forwarding problem
« Reply #7 on: April 03, 2009, 08:20:57 AM »
I looked on at he emulator and you should be able to forward more than one port.

Instead of 21  you should be able to use 20-21 or 20, 21
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sgip2000

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Re: FTP port forwarding problem
« Reply #8 on: April 03, 2009, 08:42:53 AM »
Quote from: smlunatick on April 03, 2009, 08:20:57 AM
I looked on at he emulator and you should be able to forward more than one port.

Instead of 21  you should be able to use 20-21 or 20, 21

Yeah, I tried forwarding 20 and 21 to 21 on the DNS-323.  Same result.  Quite baffling.
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smlunatick

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Re: FTP port forwarding problem
« Reply #9 on: April 03, 2009, 08:49:56 AM »
Port forwarding is to forward to ports to the same ports at the "destination"

Therefore you seem to need to Port Forward 20 / 21 to 20 / 21.   Change the forward rule to have both 20 / 21 in the TCP and UDP.    I was able to do this on previous D-Link routers.

It seems that the method you have used "might" be used as Port Trigger.

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sgip2000

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Re: FTP port forwarding problem
« Reply #10 on: April 03, 2009, 08:54:07 AM »
Quote from: smlunatick on April 03, 2009, 08:49:56 AM
Port forwarding is to forward to ports to the same ports at the "destination"

Therefore you seem to need to Port Forward 20 / 21 to 20 / 21.   Change the forward rule to have both 20 / 21 in the TCP and UDP.    I was able to do this on previous D-Link routers.

It seems that the method you have used "might" be used as Port Trigger.



Thanks for the suggestion.  Unfortunately, I have already tried that and it is not working either.

I'm actually getting the following errors when attempting to connect:

[08:44:26] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
[08:44:26] Client closed the connection.
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smlunatick

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Re: FTP port forwarding problem
« Reply #11 on: April 03, 2009, 01:13:01 PM »
You can:

Try setting a DMZ port to the FTP server

OR

Tweak around the    Application Level Gateway (ALG) Configuration
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sgip2000

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Re: FTP port forwarding problem
« Reply #12 on: April 03, 2009, 01:40:36 PM »
Quote from: smlunatick on April 03, 2009, 01:13:01 PM
You can:

Try setting a DMZ port to the FTP server

OR

Tweak around the    Application Level Gateway (ALG) Configuration

Tried setting setting DMZ for the FTP server.  Haven't tried any ALG changes though.
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combe

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Re: FTP port forwarding problem
« Reply #13 on: May 19, 2009, 10:12:08 PM »
I'm having this exact same problem accessing my NAS ftp (a readynas duo); it worked perfectly using both port-forwarding and virtual server forwarding under my old DGL-4500, but I'm having a heck of a time trying to get it to work with my new DIR-825.  I've DMZ'ed my NAS, used both portforwarding (with both 20 and 21) and virtual server, and so forth.  Nothing seems to be working.  Any help on this would greatly be appreciated.
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arod

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Re: FTP port forwarding problem
« Reply #14 on: May 20, 2009, 10:09:17 AM »
Try disabling SPI and set NAT Endpoint Independent for both TCP and UDP. Are you running any local AV's or firewalls?
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