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diff --git a/doc/INSTALL.appendix b/doc/INSTALL.appendix new file mode 100644 index 0000000..beeb57a --- /dev/null +++ b/doc/INSTALL.appendix @@ -0,0 +1,86 @@ +Appendix A: Difference between IP addresses and hostnames + + + There are 2 different types of INTERNET addresses, NAME addresses and + NUMERIC addresses. NAME addresses look like ENGLISH words (and indeed + they are ENGLISH words that refer to a given host). A NAME address looks + like "tolsun.oulu.fi" - and that particular address refers to the machine + named TOLSUN in Finland. It is a UNIQUE address because no other machine + in the world has its NAME address the same as "tolsun.oulu.fi". Anytime + you say "telnet tolsun.oulu.fi" - you would always connect to TOLSUN in + Finland. NUMERIC addresses refer to those addresses that are made up of + NUMBERS for example "128.214.5.6" is the NUMERIC address for TOLSUN. This + address is also UNIQUE in that no other machine in the world will be use + those NUMERIC numbers. The NUMERIC address is usually more reliable than + the NAME address because not all sites can recognize and translate the + NAME address into it's numeric counterpart. NUMERIC always seems to work + best, but use a NAME address when you can because it is easier to tell + what host you are connected to. + + + Every Unix machine has a file called "/etc/hosts" on it. This file + contains NAME and NUMERIC addresses. When you supply IRC with a NAME + address it will at first try to find it in /etc/hosts, and then (if it's + really smart), use the local Domain Name Server (DNS) to find the NUMERIC + address for the host you want to connect to. Thus if you plan to use NAME + addresses keep in mind that on SOME sites the entry for the TARGET machine + must be found in /etc/hosts or the NAME address will fail. A typical + entry in /etc/hosts looks like this: + + 130.253.1.15 orion.cair.du.edu orion.du.edu orion # BSD 4.3 + + This particular example is the Host ORION at the University of Denver. + Notice that on the far left is the NUMERIC Address for orion. The + next few ENGLISH words are the NAME addresses that can be used for orion, + "orion.cair.du.edu", "orion.du.edu", "orion". ALL of these NAME addresses + will return the NUMERIC address "130.253.1.15" which IRC will use to + connect to the TARGET UNIX. (when I say TARGET UNIX I am refering to the + UNIX you want to connect to for IRC). Any futher questions about + /etc/hosts should be directed to "man hosts". + + +Appendix B: Enabling Summon Messages + + +-----------------------------------------------------------------------+ + | E N A B L I N G / S U M M O N M E S S A G E S | + +-----------------------------------------------------------------------+ + + *NOTE* You must have ROOT or special access to the GROUP tty ('/dev') + to do this. If you want to allow users around the world to summon + users at your site to irc, then you should make sure that summon works. + + The "IRCD" program needs access to the GROUP of '/dev'. This + directory is where user TTY's are stored (as UNIX treats each Terminal + as a FILE!) IRCD needs GROUP ACCESS to /dev so that users can be + SUMMONED to the program by others users that are *in* the program. + This allows people from other Universities around the world to SUMMON + your users to IRC so that they can chat with them. Berkeley, SUN, HP-UX + and most of the newer versions of UNIX check to see if a USER is + accepting MESSAGES via the GROUP access rights on their TTY listing + in the /dev directory. For example an entry in '/dev' looks like this: + + (Unix Path on BSD 4.3 UNIX is: /dev/ttyp0) + + crw------- 1 jtrim 20, 0 Apr 29 10:35 ttyp0 + + You will note that 'jtrim' OWNS this terminal and can READ/WRITE to this + terminal as well (which makes sense because I am ENTERING DATA and + RECEIVEING DATA back from the UNIX). I logged into this particular + UNIX on "April 29th" at "10:35am" and my TTY is "ttyp0". But further + of *note* is that I do not have my MESSAGES ON! (mesg n) -- This is + how my terminal would look with MESSAGES ON (mesg y): + + crw--w---- 1 jtrim 20, 0 Apr 29 10:35 ttyp0 + + With my MESSAGES ON (mesg y) I can receive TALK(1) requests, use the + UNIX WRITE(1) command and other commands that allow users to talk + to one another. In IRC this would also allow me to get IRC /SUMMON + messages. To set up the "IRCD" program to work with /SUMMON type + the following: (using ROOT or an account that has access to '/dev'). + + % chgrp tty ircd + % chmod 6111 ircd + + The above commands read: "Give IRCD access to GROUP tty (which is /dev) + and then when ANYONE runs the IRCD allow SETUID and SETGID priviliges + so that they can use the /SUMMON command. |