Web Server forum
Back To The Forum Home!Search!Private Messaging System

This is Interesting: Free IT Magazines Now Free shipping to   
Web Server Talk Web Server Talk > Server Security > Firewalls reviews > Linksys Router and PASV FTP




  Last Thread   Next Thread Next
  Show Printable Version Email this Page Subscribe to this Thread      Post New Thread    Post A Reply      

Elf Cleric is offline     Linksys Router and PASV FTP  
Elf Cleric


View Ip Address Report This Message To A Moderator Edit/Delete Message


Click Here to See the Profile for Elf Cleric Click here to Send Elf Cleric a Private Message Find more posts by Elf Cleric Add Elf Cleric to your buddy list
 
02-08-04 08:56 AM

Hi,

I desperately need help for;

- How to configure Linksys BEFVP41 router to work in Passive mode of FTP ser
ver.

- I am using WindowsXP Pro and IIS 5.1

- My FTP server works locally fine.

- The problem is from outside, because Linksys does not work in standard way
.

- It's freezing when it trys to make directory listing and "Entering Passive
 Mode".

- It works only when I enable PASV mode in ftp client.

***I really have to make it work with and without passive mode enabled.

Thanks to everyone who can help me.

***LINKSYS has got no help for this!!!
They does not even try to do anything about this problem!




[ Post a follow-up to this message ]



    Re: Linksys Router and PASV FTP  
Richard


View Ip Address Report This Message To A Moderator Edit/Delete Message


 
02-08-04 11:34 AM

Your router really can't be blamed, it does just that, route traffic, it
does'nt care what you let through it...
Some firewalls on the other hand does'nt handle FTP well, unless PASV mode
is used.

If you check with tcpdump you'll most probably see that the authentication
goes quite well, but that the data traffic is stopped in the FW.


Rich


"Elf Cleric" <Elf.Cleric.11azoy@mail.webservertalk.com> wrote in message
news:Elf.Cleric.11azoy@mail.webservertalk.com...
>
> Hi,
>
> I desperately need help for;
>
> - How to configure Linksys BEFVP41 router to work in Passive mode of
> FTP server.
>
> - My FTP server works locally fine.
>
> - The problem is from outside, because Linksys does not work in
> standard way.
>
> - It's freezing when it trys to make directory listing and "Entering
> Passive Mode".
>
> - It works only when I enable PASV mode in ftp client.
>
> ***I really have to make it work with and without passive mode
> enabled.
>
> Thanks to everyone who can help me.
>
> ***LINKSYS has got no help for this!!!
> They does not even try to do anything about this problem!
>
>
> Elf Cleric
> ------------------------------------------------------------------------
> Posted via http://www.webservertalk.com
> ------------------------------------------------------------------------
> View this thread: http://www.webservertalk.com/message114831.html
>







[ Post a follow-up to this message ]



    Re: Linksys Router and PASV FTP  
Duane Arnold


View Ip Address Report This Message To A Moderator Edit/Delete Message


 
02-08-04 12:34 PM

Elf Cleric <Elf.Cleric.11azoy@mail.webservertalk.com> wrote in
news:Elf.Cleric.11azoy@mail.webservertalk.com:

>
> Hi,
>
> I desperately need help for;
>
> - How to configure Linksys BEFVP41 router to work in Passive mode of
> FTP server.
>
> - I am using WindowsXP Pro and IIS 5.1
>
> - My FTP server works locally fine.
>
> - The problem is from outside, because Linksys does not work in
> standard way.
>
> - It's freezing when it trys to make directory listing and "Entering
> Passive Mode".
>
> - It works only when I enable PASV mode in ftp client.
>
> ***I really have to make it work with and without passive mode
> enabled.
>
> Thanks to everyone who can help me.
>
> ***LINKSYS has got no help for this!!!
> They does not even try to do anything about this problem!
>
>
> Elf Cleric
> -----------------------------------------------------------------------
-
> Posted via http://www.webservertalk.com
> -----------------------------------------------------------------------
-
> View this thread: http://www.webservertalk.com/message114831.html
>
>

Other than forwarding ports 20 and 21 UDP and TCP and disabling Block WAN
Request on the router and possibly disabling SPI, the router has nothing
to do with Standard/Port or PASV mode being used to access a FTP server.

http://support.microsoft.com/defaul...kb;EN-US;309816
http://support.microsoft.com/?kbid=323446

Google is your friend.

Duane 





[ Post a follow-up to this message ]



    Re: Linksys Router and PASV FTP  
Richard


View Ip Address Report This Message To A Moderator Edit/Delete Message


 
02-08-04 01:34 PM

Seems you know something i do'nt...
As far as i know this particular router does'nt support port forewarding,
but i might have missed it...

Rich

 
>
> Other than forwarding ports 20 and 21 UDP and TCP and disabling Block WAN
> Request on the router and possibly disabling SPI, the router has nothing
> to do with Standard/Port or PASV mode being used to access a FTP server.
>
> http://support.microsoft.com/defaul...kb;EN-US;309816
> http://support.microsoft.com/?kbid=323446
>
> Google is your friend.
>
> Duane 







[ Post a follow-up to this message ]



    Re: Linksys Router and PASV FTP  
Lars M. Hansen


View Ip Address Report This Message To A Moderator Edit/Delete Message


 
02-08-04 02:34 PM

On Sun, 08 Feb 2004 22:06:18 GMT, Richard spoketh

>Seems you know something i do'nt...
>As far as i know this particular router does'nt support port forewarding,
>but i might have missed it...
>
>Rich
>

Would help if we knew the model...

Either was, ftp is a very nasty protocol, and doesn't work very with NAT
routers...


Lars M. Hansen
www.hansenonline.net
Remove "bad" from my e-mail address to contact me.





[ Post a follow-up to this message ]



    Re: Linksys Router and PASV FTP  
Duane Arnold


View Ip Address Report This Message To A Moderator Edit/Delete Message


 
02-08-04 02:34 PM

"Richard" <richard@nospam.no> wrote in
news:upyVb.254$72.171023872@news.telia.no:

> Seems you know something i do'nt...
> As far as i know this particular router does'nt support port
> forewarding, but i might have missed it...
>
> Rich
>
> 
>
>

ftp://ftp.linksys.com/pdf/befvp41ug.pdf

On page 50 in the manual it indicates coming from the Forwarding screen
to access the Port Triggering Screen. It looks like the basic firmware
usage for any Linksys router, minus all the VPN stuff. Port Triggering is
a form of Port Forwarding, although the manual doesn't seem to discuss or
show a Port Forwarding screen or I couldn't find it in the manual.

If the router doesn't do Port Forwarding, then the OP has a problem. <g>

Duane 





[ Post a follow-up to this message ]



    Re: Linksys Router and PASV FTP  
Leythos


View Ip Address Report This Message To A Moderator Edit/Delete Message


 
02-08-04 03:34 PM

In article <Xns9489ADE5F851Cnotmwnotmecom@204.127.204.17>,
notme@notme.com says...
> "Richard" <richard@nospam.no> wrote in
> news:upyVb.254$72.171023872@news.telia.no:
> 
>
> ftp://ftp.linksys.com/pdf/befvp41ug.pdf
>
> On page 50 in the manual it indicates coming from the Forwarding screen
> to access the Port Triggering Screen. It looks like the basic firmware
> usage for any Linksys router, minus all the VPN stuff. Port Triggering is
> a form of Port Forwarding, although the manual doesn't seem to discuss or
> show a Port Forwarding screen or I couldn't find it in the manual.
>
> If the router doesn't do Port Forwarding, then the OP has a problem. <g>

All Linksys routers do port forwarding, and you only need to upgrade the
firmware and it's there in the list. While it makes things a little
difficult (NAT), it works as well as any other NAT FTP combination.

--
--
spamfree999@rrohio.com
(Remove 999 to reply to me)





[ Post a follow-up to this message ]



    Re: Linksys Router and PASV FTP  
Jim Nugent


View Ip Address Report This Message To A Moderator Edit/Delete Message


 
02-08-04 06:33 PM


"Richard" <richard@nospam.no> wrote in message
news:oAwVb.251$72.179820032@news.telia.no...
> Your router really can't be blamed, it does just that, route traffic, it
> does'nt care what you let through it...
> Some firewalls on the other hand does'nt handle FTP well, unless PASV mode
> is used.

In the normal FTP protocol the remote host sends back a port number and
says, listen on this port for the data. That doesn't work so well with most
firewalls, so that's exactly what PASV (passive) mode is for.  All
connections are handled from the client end. It's been around since the days
of the SOCKS proxy, and most FTP clients support it.

I suppose an FTP client could use UPNP to set up the router to open the
appropriate port, but it's easier to use PASV because it's already there.
--
Jim (for e-mail replace invalid with net)
"Remember, an amateur built the Ark; professionals built the Titanic."







[ Post a follow-up to this message ]



    Re: Linksys Router and PASV FTP  
Richard


View Ip Address Report This Message To A Moderator Edit/Delete Message


 
02-09-04 04:33 AM

So nice and easy :-)

Rich
 
is 
or 
>
> All Linksys routers do port forwarding, and you only need to upgrade the
> firmware and it's there in the list. While it makes things a little
> difficult (NAT), it works as well as any other NAT FTP combination.
>
> --
> --
> spamfree999@rrohio.com
> (Remove 999 to reply to me)







[ Post a follow-up to this message ]



    Sponsored Links  




 





   All times are GMT. The time now is 02:04 PM.      Post New Thread    Post A Reply      
  Last Thread   Next Thread Next


Most Popular forums 

Forum Jump:
Rate This Thread:

Forum Rules:
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is OFF
vB code is ON
Smilies are ON
[IMG] code is OFF
 

Back To The Top
Home | Usercp | Faq | Register