Turning Off Ipforwarding on Irix 3.2

Thomas D. Schardt tom at fangorn.gsfc.nasa.gov
Thu Feb 8 03:00:14 AEST 1990


Our network management wants all UNIX workstations that are not
performing routing functions (99.9% of the machines on base) to
turn off ipforwarding.  Unforunately, SGI sets ipforwarding as 
the default.  I have read "Kernal Configuration" in the Irix 3.2
System Administrator's Guide, and I have determined that the
following procedure should rebuild the kernal with ipforwarding
off:

   % su
   # cd /usr/sysgen/master.d
   # cp bsd bsd.old
   # vi bsd
      change
	      int ipforwarding = 1;
      to
	      int ipforwarding = 0;
      ZZ
   # cd /usr/sysgen/boot
   # cp bsd.a bsd.a.old
   # lboot -u /unix.install
   # cd /
   # cp unix unix.orig
   # sync
   # sync
   # reboot

   When /etc/rc2.d/S95autoconfig is run and the following prompt appears,
   answer 'y':

      Automatically reconfigure the operating system?

Is this the correct procedure?  Also is there any way of determining if
the ipforwarding flag is off in a given kernal file?
Tom Schardt                        Bitnet:    K4TDS at SCFVM
NASA/Goddard Space Flight Center   Internet:  K4TDS at SCFVM.GSFC.NASA.GOV
Code 632                           Opinions expressed are my own and do not
Greenbelt, MD 20771                necessarily reflect the opinions of my employer



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