Lame corporate proxies exposed
A few weeks ago I wrote about lame corporate proxy servers which mangle the HTTP request headers on behalf of their employees and customers and therefore cause them to be denied access to websites such as this one.
Statistically, our anti-spam software has been blocking access to anyone relying on the following misconfigured proxies:
- 21torr.com
- adelphia.net
- alicedsl.de
- ameritech.net
- aol.com
- asd.tj.cn
- bell.ca
- bluedome.net
- blueyonder.co.uk
- btcentralplus.com
- bvconline.com.ar
- cantv.net
- cernel.net
- cgocable.net
- charter.com
- chu.edu.tw
- codetel.net.do
- comcast.net
- cox.net
- cpd.ufjf.br
- cyberz.co.jp
- cytanet.com.cy
- dnsalias.com
- dreamhost.com
- dslohio.net
- edgeio.com
- emirates.net.ae
- enmaxenvision.net
- ev1servers.net
- eva.com.mx
- hertza.ro
- inhoster.com
- inquira.com
- insightbb.com
- interbusiness.it
- intercage.com
- ipplanet.net
- kalypsoweb.com
- keymachine.de
- layeredtech.com
- linkvendor.com
- main-hosting.com
- message-group.mobi
- metrocast.net
- metrolink.pl
- mgc.com.au
- microsoft.com
- mojeek.com
- mtn.co.za
- muc-t-systems.com
- ne.jp
- net.il
- netcathosting.com
- netvisio.net
- okay.pl
- optonline.net
- optusnet.com.au
- oup.com
- pacbell.net
- pacific.net.id
- pol.co.uk
- powergate.ca
- proxy77.net
- qwest.net
- rr.com
- sensis.com.au
- sify.net
- sohu.com
- state.fl.us
- stumbleupon.com
- surfer.at
- t-ipconnect.de
- tedata.net
- tele.dk
- telecable.es
- telkomadsl.co.za
- theplanet.com
- tktelekom.pl
- twtelecom.net
- virtua.com.br
- vmhk.net
- vsnl.net.in
- warp-factor.net
- websiteoptimization.com
- westnet.com.au
- westpac.com.au
- whois.sc
- wideopenwest.com
- wildpark.net
- wnet.ua
- xtra.co.nz
- yahoo.net
Is your employer or internet service provider one of them? I guess some of you will never know, because if it is, you probably won't be able to read this post either.
Due to the large volume of spam, comments are disabled. If you have anything relevant to say, you can leave a comment via Twitter, or contact me directly.
About the author
I'm Ivan Lutrov and I'm the owner of Lutrov Interactive. I have 25 years of experience producing interactive work and I create cost effective business websites that are simple, engaging and easy to use. I practice what I preach and I say what I really think, even if it's sometimes not what you want to hear. Subscribe to the Lutrov Interactive feed via RSS and follow me on Twitter.