Re: FTP and WPA problem
- From: "Peter Crosland" <g6jns@xxxxxxxxxxx>
- Date: Wed, 25 Apr 2007 08:34:34 +0100
Jeff Liebermann wrote:
"Peter Crosland" <g6jns@xxxxxxxxxxx> hath wroth:
My Acer Aspire 3003 laptop works fine when connected using the
inbuilt Ethernet port for all applications including FTP uploads
using SmartFTP or a an FTP program built into some application
software I have. When I fit a Netgear WG511T Cardbus card this works
fine for browsing and email. However, if I try to use an FTP program
such as Smart instead of the Ethernet card neither of the FTP
programs will work. I am using WPA with a 128bit preshared key.
This is true if I use the standard Windows drivers for the card or
the ones supplied by Netgear. I am running a fully patched Windows
XP Home and the machine has 1GB of memory. AFAICS there must be some
incompatibility be the FTP protocol and WPA but I cannot see why
that should be. I would expect the WPA protocol to be transparent.
Any constructive suggestions would be welcome as my Googling has not
turned anything up.
What maker and model router are you using? Extra credit for the
Weird. Try using the PASV mode for ftp. It should be a setting
(somewhere) in SmartFTP. I don't think it will really do anything
but it's worth a try.
It would also be interesting if you tried ftp with encryption
In theory, encryption should not have anything to do with ftp
functionality. However, ftp is unique in that the router has to do
something odd with ftp in order to impliment NAT. In order to
seperate mutliple ftp streams, the router has to sniff the payload in
order to extract the port numbers used. Ordinarily, the port numbers
are in the header, but not for ftp. It's possible that your
unspecified model wireless router is having a problem doing that.
Perhaps a firmware update might help.
Thanks for that Jeff. I have tried passive mode and it makes not difference.
I am using a Draytek 2800G with the latest UK firmware that has been around
for ages and AFAIK is quite stable. I should also have said that the problem
is also there if I use the WEP protocol. I have not tried with an open
network but will do so but this will not be a solution that I can use for
security reasons. One other clue is that I have now tried my Dell Inspiron
6400 fitted with a Gigabyte internal wireless card and works perfectly when
running the same software. To me this would suggest that the incompatibility
is with the WG511T in some way. Signal sterngth is not a problem as both
cards connect happily at 108Mbps.
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