Re: Just To Weird. If anyone CAN Help.... Please!

From: Jeff Cochran (jeff.nospam_at_zina.com)
Date: 07/15/04 

Date: Thu, 15 Jul 2004 02:45:17 GMT

On Wed, 14 Jul 2004 14:39:19 -0700, "MBramlett"
<mbramlett032@yahoo.com> wrote:

>Here are the facts:
>Up until July 7th, all the following was true:
>a.) Had program that "Phone-Home" to our FTP Server.
>b.) FTP Server is NT4.0 6a
>c.) Login unique/password... all working great.
>d.) Program simply uploaded files and quit.
>'=========
>After July 7th... all the above was STILL true; except.
>-We changed backbone providers.
>-Changed to have public IPs/translated to private via
>router.
>** BEFORE Jumping to conclusions... here is what we have
>tested so far: *************
>+ Any "human" can log in to aforementioned site; upload a
>file just fine.
>+Can see the program loggin into.
>+There has been absolutely no changes to the program. (as
>we are the developers too.)
>+The program is really a dumb program. It just reads
>FQDN - goes to it (there is no reverse look-up in
>otherwords).
>
>What happens now: Program logs in sucessfully; and times
>out. Can see it log in; but thats it.
>
>Are there any other ports that FTP would use (besides
>20 /21) - that would effect this. Even so; why logging in
>by hand works; program doesn't. Program hasn't changed
>in over a year.
>
>Any ideas; help or suggestions are certainly welcomed.

Most likely you're blocking a port used for the transfer, are you
using active or passive mode in your app? Also, look at the FTP logs
and see what the exact communications are.

Jeff