Re: FreeBSD Security Advisory FreeBSD-SA-03:12.openssh

From: Jason Stone (freebsd-security_at_dfmm.org)
Date: 09/19/03

  • Next message: David G. Andersen: "Re: [Fwd: Re: FreeBSD Security Advisory FreeBSD-SA-03:12.openssh]" 
    Date: Thu, 18 Sep 2003 18:33:31 -0700 (PDT)
To: freebsd-security@freebsd.org

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    > Advantages to using inetd include connection count limiting,
    > connection rate limiting, tcp_wrappers, address binding, and
    > simplicity (KIS), among others.
    >
    > Back when ssh was originally developed, in the days of 50Mhz
    > processors, key generation time made running sshd out of inetd slow.
    > For the past several years, however, this has not been an issue.
    > Why FreeBSd's default installation still uses a legacy stand-alone
    > ssh daemon is a question many systems administrators are asking.

    Uh, you've got it backwards dude - inetd was developed way way back in the
    day, when having a separate telnetd, ftpd, etc all running all the time
    consumed too many resources. Most modern daemons (sshd, apache, bind,
    dhcpd, etc) all run as standalones - the ones that still want inetd are
    stuff like talkd, fingerd, uucpd - ie, the daemons that no one runs
    anymore.

    And how is having two daemons (inetd and sshd), each with their own config
    files and implementation bogosities _simpler_ that just the one? Uh, I
    could run inetd _and_ sshd, or just sshd - hmm, which do I think is
    simpler...? And sshd has all the "advantages of inetd" which you mention.

    - From a security standpoint, I really think that inetd outght not be used.
    It's an additional root-running source of complexity and potential bugs,
    and it is almost never necesary.

     -Jason

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