There are Tor DNSBLs, which have been incorporated into popular blacklists such as SORBS. Since you can poll the directory server for a list of exit nodes this is rather easy to compile. Tor does not give an x-forward-for.
<br><br>To avoid getting hosts that have been blacklisted, use newer proxies that haven't been absorbed into blacklists yet.<br><br><div><span class="gmail_quote">On 4/22/06, <b class="gmail_sendername">Justin Terry</b> <
<a href="mailto:jdterry84@gmail.com">jdterry84@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div style="direction: ltr;">
Hello List!<br>
<br>
I am a long time reader, first time poster, and everything like that.<br>
<br>
I use a proxy service that runs in my system tray, (the onion router,
and privoxy, in conjunction) and when i use this software, everything
works great. When i go to <a href="http://www.whatismyipaddress.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">www.whatismyipaddress.com</a> however, it tells
me that a proxy server is detected.<br>
<br>
How is it possible for them to detect that i am using a proxy?<br>
<br>
(also, sometimes it can detect that i am using a proxy, and other times
it can not, although i use the same software all the time.)<br>
<br>
Thanks in advance guys!<br>
<br>
<br>
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