hi,

are you NAT'ed or MASQUERADED? there are a somethings (if not alot of 
things) you cant do when you are behind this kind of router... as for 
the ftp with DAP, if your linux router uses iptables and takes advantage 
of statefull filtering and doesnt have the kernel module for ftp for 
NATed connections loaded then active ftp session will fail as 
connections from port 20 are not recognized as being ESTABLISHED or 
RELATED, use passive mode instead. also some ftp sites dont allow 
multiple simultaneous connections coming from the same source.

there used to be some kernel modules that helped when using specific 
services behind NATed or MASQUERADED connections in 2.2 like icq and 
quake but no one rewrote them for 2.4
 
it seems that problems like these have solutions specific to a 
service/protocol and there is no one cure.

Ratnakar Koli wrote:

>My company has a 128kbps leased line which is shared
>thru our linux box which is a RH 7.2 setup. there r a
>few things which i tried and doesnt seem to get any
>proper result.
>
>1. When trying to download using FTP with DAP
>(Download Accelarator Plus) it simply says "Cannot
>connect to the site. In fact, i tried downloading from
>RedHat FTP site the iso files. 
>   The same i tried on dial-up at home it works. What
>should i do?
>
>2. I have a go2call account and i m not able to use
>the service, i spoke to my administrator, he says the
>ports r open and i should be able to use it without
>any prob. How do i check if the port is open?
>
>Ratnakar
>
>
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