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Full Discussion: General Proxy Question
Top Forums UNIX for Dummies Questions & Answers General Proxy Question Post 7319 by Neo on Monday 24th of September 2001 10:36:14 PM
Old 09-24-2001
No suggestions. I cannot think of any 100 percent reliable way to check this. Proxies, from the client perspective, look the same as clients. As you suggest, high port numbers are not an indication of a proxy server. Clients use high port numbers as well.

You might be able to guess proxies from large companies that direct the vast majority of traffic thru proxy servers by a study of the IP addresses of the connections. This would be a good guess for large organizations. You can also tell clients that are more-than-likely not proxied because of the hostname, i.e. the DHCP names of clients with Roadrunner, @Home, etc. This would be intelligent guessing (at best) and incomplete.
 

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IMAPPROXYD(8)							 IMAP proxy daemon						     IMAPPROXYD(8)

NAME
imapproxyd - IMAP proxy daemon SYNOPSIS
imapproxyd [ -f <config file name> ] [ -p <pidfile name> ] DESCRIPTION
This manual page documents briefly the imapproxyd command. This manual page was written for the Debian distribution because the original program does not have a manual page. UP-ImapProxy proxies IMAP transactions between an IMAP client and an IMAP server. The general idea is that the client should never know that it is not talking to the real IMAP server, but ImapProxy caches server connections. ImapProxy was written to compensate for webmail clients that are unable to maintain persistent connections to an IMAP server. Most webmail clients need to log in to an IMAP server for nearly every single transaction; This behaviour can cause tragic performance problems on the IMAP server. ImapProxy tries to deal with this problem by leaving server connections open for a short time after a webmail client logs out. When the webmail client connects again, ImapProxy will determine if there is a cached connection available and reuse it if possible. FILES
By default, UP-ImapProxy reads /etc/imapproxy.conf on startup. This can be changed by using the -f option Unless foreground_mode has been enabled, UP-ImapProxy will write its PID to to a PID-file. It defaults to /var/run/imapproxy.pid, but can be overridden with the -p option SEE ALSO
pimpstat(8), AUTHOR
This manual page was written by Jose Luis Tallon <jltallon@adv-solutions.net>, for the Debian GNU/Linux system (but may be used by others). Dave McMurtrie Mar 12, 2004 IMAPPROXYD(8)
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