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wget ftp://ftp.sendmail.org/pub/sendmail/sendmail.8.12.11.tar.gz tar -xvzf sendmail.8.12.11.tar.gz cd sendmail-8.12.11/ cd sendmail sh Build cd ../cf/cf cp /etc/mail/sendmail.mc . sh Build sendmail.cf cp /etc/mail/sendmail.mc /etc/mail/sendmail.mc.bak cp /etc/mail/sendmail.cf /etc/mail/sendmail.cf.bak sh Build install-cf cp /usr/sbin/sendmail.sendmail /usr/sbin/sendmail.sendmail.bak cd ../../sendmail mkdir /usr/man/man1 mkdir /usr/man/man5 mkdir /usr/man/man8 sh Build install service sendmail stop cp /usr/sbin/sendmail /usr/sbin/sendmail.sendmail service sendmail start rm /usr/sbin/sendmail ln -s /etc/alternatives/mta /usr/sbin/sendmail |
Upgrade RedHat Enterprise 2.1 AS to Sendmail 8.12.11
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Note: BerkeleyDB.4.2 was previously installed from source onto the system so there was not need to install this package. On a purely stock install this would have been required. Edit /etc/ld.so.conf and add line: /usr/local/BerkeleyDB.4.2/lib to the end of the file. > ldconfig > wget ftp://ftp.sendmail.org/pub/sendmail/sendmail.8.12.11.tar.gz > tar -xvzf sendmail.8.12.11.tar.gz > cd sendmail-8.12.11/ > cd devtools/Site Create a file site.config.m4 with: define(`confMAPDEF', `-DNEWDB') define(`confINCDIRS', `-I/usr/local/BerkeleyDB.4.2/include/') define(`confLIBDIRS', `-L/usr/local/BerkeleyDB.4.2/lib/') > cd ../../sendmail > sh Build > cd ../cf/cf > cp /etc/mail/sendmail.mc . Edit sendmail.mc and comment out the line: define(`confAUTO_REBUILD')dnl so that it reads: dnl define(`confAUTO_REBUILD')dnl Also change the line: FEATURE(`access_db',`hash -o /etc/mail/access.db')dnl to read: FEATURE(`access_db',`hash -T<TMPF> -o /etc/mail/access.db')dnl Finally change the line: define(`confAUTH_OPTIONS', `A')dnl to: dnl define(`confAUTH_OPTIONS', `A')dnl > sh Build sendmail.cf > cp /etc/mail/sendmail.mc /etc/mail/sendmail.mc.bak > cp /etc/mail/sendmail.cf /etc/mail/sendmail.cf.bak > sh Build install-cf > cp /usr/sbin/sendmail /usr/sbin/sendmail.bak > cd ../../sendmail > groupadd -g 25 smmsp > useradd -g smmsp -u 25 smmsp > chsh -s /sbin/nologin smmsp > sh Build install > chown smmsp.smmsp /var/spool/clientmqueue > chmod u+rwx,g+rwx,o-rwx /var/spool/clientmqueue > chown root.wheel /var/spool/mqueue > chmod u+rwx,g-rwx,o-rwx /var/spool/mqueue |
Squid Guard
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#!/bin/bash # squid This shell script takes care of starting and stopping # Squid Internet Object Cache # # chkconfig: - 90 25 # description: Squid - Internet Object Cache. Internet object caching is \ # a way to store requested Internet objects (i.e., data available \ # via the HTTP, FTP, and gopher protocols) on a system closer to the \ # requesting site than to the source. Web browsers can then use the \ # local Squid cache as a proxy HTTP server, reducing access time as \ # well as bandwidth consumption. # pidfile: /var/run/squid.pid # config: /etc/squid/squid.conf PATH=/usr/bin:/sbin:/bin:/usr/sbin export PATH # Source function library. . /etc/rc.d/init.d/functions # Source networking configuration. . /etc/sysconfig/network # Check that networking is up. [ ${NETWORKING} = "no" ] && exit 0 # check if the squid conf file is present [ -f /usr/local/squid/etc/squid.conf ] || exit 0 # determine the name of the squid binary [ -f /usr/local/squid/sbin/squid ] && SQUID=squid [ -z "$SQUID" ] && exit 0 prog="$SQUID" # determine which one is the cache_swap directory CACHE_SWAP=`sed -e 's/#.*//g' /usr/local/squid/etc/squid.conf | \ grep cache_dir | awk '{ print $3 }'` [ -z "$CACHE_SWAP" ] && CACHE_SWAP=/usr/local/squid/var/cache RETVAL=0 start() { for adir in $CACHE_SWAP; do if [ ! -d $adir/00 ]; then echo -n "init_cache_dir $adir... " /usr/local/squid/sbin/squid -z -F 2>/dev/null fi done echo -n $"Starting $SQUID $prog: " /usr/local/squid/sbin/squid $SQUID_OPTS 2> /dev/null & RETVAL=$? [ $RETVAL -eq 0 ] && touch /var/lock/subsys/$SQUID [ $RETVAL -eq 0 ] && echo_success [ $RETVAL -ne 0 ] && echo_failure echo return $RETVAL } stop() { echo -n $"Stopping $prog: " /usr/local/squid/sbin/squid -k check >/dev/null 2>&1 RETVAL=$? if [ $RETVAL -eq 0 ] ; then /usr/local/squid/sbin/squid -k shutdown & rm -f /var/lock/subsys/$SQUID timeout=0 while : ; do [ -f /usr/local/squid/var/logs/squid.pid ] || break sleep 2 && echo -n "." timeout=$((timeout+2)) done echo_success echo else echo_failure echo fi return $RETVAL } reload() { /usr/local/squid/sbin/squid $SQUID_OPTS -k reconfigure } restart() { stop start } condrestart() { [ -e /var/lock/subsys/squid ] && restart || : } rhstatus() { status $SQUID /usr/local/squid/sbin/squid -k check } probe() { return 0 } case "$1" in start) start ;; stop) stop ;; reload) reload ;; restart) restart ;; condrestart) condrestart ;; status) rhstatus ;; probe) exit 0 ;; *) echo $"Usage: $0 {start|stop|status|reload|restart|condrestart}" exit 1 esac exit $? |
Route Table Testing
Use this command:
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> ip route get <i>{dest ip}</i> |
To test from a specific source use:
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> ip route get <i>{dest ip}</i> from <i>{src ip}</i> |
Advanced Networking Resources
http://linux-ip.net – Great online book about advanced networking issues.
http://lartc.org/ – Howto and man pages