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54 lines
2.6 KiB
Text
54 lines
2.6 KiB
Text
@(#) README.IRIX 1.2 94/12/28 18:45:58
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In the past few months I received several messages with questions from
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people that tried to use my tcp wrapper on IRIX 5.x. Some mysteries
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could be solved via email, and then some remained.
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Today I finally had a chance to do some tests on someones IRIX 5.2
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system. Here is my first-hand experience with wrapper release 6.3.
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(1) Inetd is broken. Normally one edits inetd.conf, sends a HUP signal
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to inetd and that's it. With IRIX evil things happen: inetd is too
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stupid to remember that it is already listening on a port.
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In order to modify an entry in inetd.conf, first comment it out
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with a # at the beginning of the line, kill -HUP the inetd, then
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uncomment the inetd.conf entry and kill -HUP again.
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Even with this amount of care I have seen inetd messing up, like
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calling rusersd when I make a talk connection. Even killing and
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restarting inetd does not solve all problems.
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I find it hard to believe, it but the best thing to do with IRIX is
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to reboot after changing inetd.conf.
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(2) When tcpd is built according to the irix4 Makefile rules, it
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appears to work as expected with TCP-based services such as
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fingerd, and with UDP-based services such as ntalk and tftp.
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(3) It does NOT work with RPC over UDP services such as rusersd and
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rstatd: the wrapper hangs in the recvfrom() system call, and I
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have spent several hours looking for ways to work around it. No
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way. After finding that none of the applicable socket primitives
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can be made to work (recvfrom recvmsg) I give up. So, the IRIX RPC
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services cannot be wrapped until SGI fixes their system so that it
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works like everyone elses code (HP Sun Dec AIX and so on).
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(4) I didn't even bother to try the RPC over TCP services.
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(5) When an IRIX 5.2 system is a NIS client, it can have problems with
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hosts that have more than one address: the wrapper will see only
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one address, and may complain when PARANOID mode is on. The fix is
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to change the name service lookup order in /etc/resolv.conf so that
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your system tries DNS before NIS (hostresorder bind nis local).
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(6) IRIX 5.2 is not System V.4, and it shows. Do not link with the
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-lsocket and -lnsl libraries. They are completely broken, and the
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wrapper will be unable to figure out the client internet address.
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So, TLI services cannot be wrapped until SGI fixes their system so
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that it works the way it is supposed to.
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I am not impressed by the quality of the IRIX system software. There
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are many things that work on almost every other system except with IRIX.
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Wietse
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