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Hey Everyone,

Sorry for not sending this out sooner but I've been busy with
the recent IP MASQ article in the August edition of "Linux Magazine"
and a new BOOK called "Securing Linux: Step by Step" from SANS.
The SANS doc will be out in December.

Anyway.. Some serious changes in here folks.  You gotta do 
sendmail at least.

Ps. 247 people on the list now!  Kinda low I think but thats ok.

--David





N       8/27/99 Minor changes.. 
        *Sent 
        Update*

------------------

N       8/26/99 Deleted section 44 since it was integrated into 
                        section 10.
                        [Section 3]

*C*                     There is a fragmentation bug in all 2.2.x linux 
                        kernels less than 2.2.11 that makes strong 
                        IPCHAINS rulesets worthless.  Because of
                        this, it is critical that you upgrade your 
                        kernel.
                        [Section 5, 10]

G                       Deleted [Section 44] and integrated it into 
                        [Section 10]

N                       Added pointers to 2.2.x people that need port 
                        forwarding to read the IP-MASQ-HOWTO for 
                        full details.  Currently, TrinityOS only 
                        covers 2.0.x's IPPORTFW tool.
                        [Section 11]

------------------

N       8/25/99 Updated the TOC

*C*                     Vastly updated the Sendmail section and moved 
                        up to 8.9.3.  You might not beleive it but your 
                        domain might be an OPEN Relay though you 
                        -think- you FIXED it.  I'm Serious.. go look 
                        at www.orbs.org.  I was vunerable.
                        [Section 25]
                                
-------------------

N       8/13/99 Removed the echo line from the NTP script so 
                        people wouldn't get emailed once every 15 
                        minutes.  Doh!  Didn't have that on my box 
                        though it was in TrinityOS.  
                        [Section 26]

------------------

G       8/3/99  Added a cool little trick to find out what 
                        version and what features were compiled into 
                        your version of Sendmail.
                        [Section 25]

------------------

N       8/1/99  Updated the distribution sections to reflect 
                        RH6, Slackware 4, and added a little blurb 
                        on Mandrake.
                        [Section 6]

------------------

G       7/27/99 Added the .iso, .mp3, and .asf files to the 
                        /etc/bruxpat file to have Bru NOT compress 
                        those types of files.
                        [Section 29]

------------------

G       7/19/99 I recently learned that BIND updates its 
                        "listening" interfaces every 60 seconds.  Thus, 
                        if you bring up a PPP interface, BIND will
                        start automatically answering queries on 
                        that PPP interfaces's IP address!  This might 
                        not be a problem to you but I notices that 
                        after the PPP link was disconnected, named 
                        was still listening on that IP address though 
                        it was gone.  Ack!  I have now implimented the 
                        "listen-on" option to only allow BIND to 
                        listen on the external interface, the interal 
                        interface (if you have one), and localhost.
                        [Section 24]

------------------

G       7/18/99 Updated the SSH section to make the recommendation 
                        to disable the ability to login as root.  User's 
                        needing root priv's can SU in.
                        [Section 30]

------------------

N       7/14/99 Removed the 2.2.x kernel config from the Future 
                        Features section.
                        [Section 3]

G                       I never realized this but its important to run 
                        ppp'd "make kernel" script before you compile 
                        the kernel so you get all the various compression 
                        codecs into the kernel.
                        [Section 13]

G                       Added "deflate 15,15" to the /etc/ppp/options 
                        file to enable the Gzip-based deflate compressor 
                        for PPPd.
                        [Section 22]

--------------------

G       7/13/99 Added the build-it script to aid in the compiling 
                        and installation of a new kernel 
                        [Section 12]

N                       Updated the 2.0.x kernel config to reflect a 
                        kernel with the IPPORTFW and LooseUDP patches
                        [Section 12]

G                       Added a 2.2.x kernel config though it applies 
                        to different hardware than documented in 
                        TrinityOS (the 2.2.x kernel is running on a Dual
                        P-90 box)
                        [Section 12]

------------------

I       7/11/99 Fixed a typo in the IPCHAINS port that named 
                        the external interface's IP address variable 
                        "EXITIP" instead of the correct "EXTIP".  The 
                        IPCHAINS ruleset is not v2.97.

                        Thanks to [EMAIL PROTECTED] for the sharp eye. 
                        [Section 10]

------------------

N       7/7/99  Updated the hardware section and parition 
                        tables to reflect that /dev/hdb died and added 
                        /dev/sdb
                        [Section 3]

N                       Updated the RAID section to reflect that 
                        /dev/hdb is gone and replaced
                        it with /dev/sdb
                        [Section 31]

------------------

N       6/29/99 Updated the URL for PPPd
                        [Section 5]
------------------

N       6/28/99 Change in the "Future Feature" section the 
                        logging of the UPS from 10 sections to 1 
                        second increments
                        [Section 3]

N                       Added to the "Future Feature" section the 
                        rotation of UPS logs and the deletion of 
                        "LPR" and replacing it with "LPRng".
                        [Section 3]

N                       I was notified by [EMAIL PROTECTED] that the 
                        file permissions for /usr/bin/lpr were 
                        incorrectly     set to 4750 instead of 4755 
                        as shown in [Section 47].  I added a 
                        little NOTE to the changing of all the file 
                        permissions to let users know that the 
                        correct LPR setting of 4755 isn't the best 
                        for system security.  The proper solution 
                        is to DELETE LPR and install LPRng.
                        [Section 8]

N                       I removed the note in the sendlogs area 
                        about providing a "multi-user" version of the 
                        sendlogs script.  The reason I removed this 
                        is because too many people were complaining 
                        of having things they considered important 
                        filtered out.  I also removed this offer 
                        because I will be putting up a Perl version 
                        of this script that will be a lot faster, 
                        more efficent, and flexible in the future.
                        [Section 9]

N                       I added some clarifications and copied the 
                        note from [Section 8] about LPR's file 
                        permissions into this section.
                        [Section 47]

------------------

.----------------------------------------------------------------------------.
|  David A. Ranch - Linux/Networking/PC hardware         [EMAIL PROTECTED]  |
!----                                                                    ----!
`----- For more detailed info, see http://www.ecst.csuchico.edu/~dranch -----'



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