Solved

ADSL transfer failure for large HTTP files

Posted on 2009-05-20
2
249 Views
Last Modified: 2013-12-14
We're currently suffering from a rather odd problem that appears to be our ADSL line...

The ADSL connection is being used to host web services (HTTPS/443). When connecting externally, small data transfers seem to work fine, however larger data transfers hang.

For example:  

* Accessing Outlook Webmail, the browsing of folders and messages works fine, however as soon an attachment is attempted to be downloaded, the transfer hangs.

* Windows server (IIS) file web sharing - the directory tree can be browsed, however attempting to download a file from the system causes the transfer to hang.

Naturally, we suspected IIS, however we also have a SVN server running on Apache (different port, not a standard HTTP/HTTPS port number but still using SSL). Again, browsing the repository works fine however attempting to download a file causes the transfer to hang.

To narrow down the fault, we installed a brand new instance of Apache onto a clean laptop. Connected this laptop directly to the ADSL modem, bypassing all firewalls and network switches. Again, the access of a basic Apache page works (the "It Works!" default page), however we placed a file into the appropriate directory and attempted to download it and, again, the transfer hangs.

We replaced the ADSL modem with another (entirely different make/model) and repeated the basic test with just the laptop running Apache and, again, the transfer hung as soon as we attempted to download a file.

We have contacted our ISP (BT), and they performed a line check and everything is apparently fine.

Any ideas what the problem is likely to be and/or how we can further diagnose this problem?
0
Comment
Question by:NickRyan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 9

Accepted Solution

by:
djpazza earned 500 total points
ID: 24431861
One of my clients had this issue this morning.  BT are moving a lot of business customers with static ip's to new servers.  During this period large transfers will suffer.  They estimate an email with 6mb attachment could take an hour.

I would give them a call for an update.


for more information see here:

http://business.bt.com/business/help/ss/0,8829,Broadband_0_5_BTCTB_Home,00.html
0
 
LVL 1

Author Comment

by:NickRyan
ID: 24432364
Thanks djpazza - seems that the BT support engineers we spoke with earlier were clueless and the BT status page carefully neglected to show this issue.

It's been happening since 10am on Monday morning, with no expected resolution time. Still not on their status page.
0

Featured Post

Free NetCrunch network monitor licenses!

Only on Experts-Exchange: Sign-up for a free-trial and we'll send you your permanent license!

Here is what you get: 30 Nodes | Unlimited Sensors | No Time Restrictions | Absolutely FREE!

Act now. This offer ends July 14, 2017.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Foreword In the years since this article was written, numerous hacking attacks have targeted password-protected web sites.  The storage of client passwords has become a subject of much discussion, some of it useful and some of it misguided.  Of cou…
    Over the past few years, small business and home owners have become so dependent on internet that a need for redundancy has arisen.    What happens when your small business or home / home office loses its internet connection?  The results c…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …

729 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question