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On 19 Dec 99, at 21:06, thus spake Ajay Kumar Nandipati:
> How to stop thirdparty relaying in Sendmail8.9.3 shipped with
> RedHat6.0 using Linuxconf ?
The answer is - you can't completely secure sendmail using
Linuxconf. It still remains open to relaying using the % and :
vulnerablities.
Here's how to close a sendmail open relay --
http://www.sendmail.org/tips/relaying.html
When you update your sendmail (get 8.9.3) - remember to rebuild
your sendmail.cf file or the upgrade will be useless.
Check out ftp://admin.netus.com/sendmail/ and download
preconfigured, secure sendmail 8.9.3 rpms. If you want to build
your sendmail.cf - don't use Linuxconf (as its check_rcpt tables are
a bit faulty). If you can't write sendmail.cf by hand then download
the generator at ftp://ftp.jpcert.or.jp/pub/security/tools/CF/
hope this helps
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Suresh Ramasubramanian | [EMAIL PROTECTED]
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