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37 lines
1.8 KiB
HTML
37 lines
1.8 KiB
HTML
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<h3>3proxy security considirations</h3>
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</ul>
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<ol>
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<li>Never install 3proxy suid. If you need it to run suid write some
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wrapper with fixed configuration file.
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<li>Make configuration file only available to account 3proxy starts with.
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<li>Under Windows NT/2000/XP/2003 if 3proxy is used as service create new
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unprivileged local account without "logon locally" right. Assign this account
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to 3proxy service.
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<li>Under unix use chroot to jail 3proxy (make sure files included in
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configuration file after 'chroot' command, if any, are available from jail)
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<li>Under Unix, either start 3proxy with unprivileged account or, if you need
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some privileged ports to be used by 3proxy, use setgid/setuid commands inside
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3proxy.cfg immediately after last occurance of service binded to
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privileged port in configuration file (setgid must preceed setuid).
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<li>Allways use full paths in configuration file
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<li>Try to avoid 'strong' authentication, because only cleartext
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authentication method is currently available.
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<li>Always specify internal and external interfaces.
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<li>Always limit connections to internal network and localhost (to 127.0.0.1 and
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all interfaces) with ACLs. Be carefull, because BIND command in SOCKS requies
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BIND method with external interface IP address to be allowed.
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<li> Always use nserver and nscache under Unix, overwise DoS attack is possible
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with unreachable DNS server (because gethostbyname will block over threads).
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<li>Remember, that 'nbname' authentication is not reliable and can be spoofed.
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<li>Keep logs in secure location, because some confidential information from
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user's request can be logged.
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<li>Use -xyz+A character filtering sequences for 'logformat', especially with
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ODBC logging to prevent SQL and log record injections.
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<li>Immediately report all service crashes to developers
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<li>Participate in code audit :)
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</ol>
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</ol>
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<p>
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