libpcap-0.8.1.tar.gz
http://sourceforge.net/project/showfiles.php?group_id=53067
pcre-4.3.tar.gz
http://sourceforge.net/project/showfiles.php?group_id=10194
libnet-1.0.2a.tar.gz
http://www.packetfactory.net/libnet/dist/deprecated/
barnyard-0.2.0.tar.gz
http://www.snort.org/dl/barnyard/
Apache 2.0.48 (httpd-2.0.48.tar.gz)
http://archive.apache.org/dist/httpd/
adodb455.tgz
http://mirror.pacific.net.au/linux/Gentoo/distfiles/
Newer version may be substituted: adodb468.tgz
http://sourceforge.net/project/showfiles.php?group_id=42718
base-1.1.2.tar.gz
http://sourceforge.net/project/showfiles.php?group_id=103348
jpgraph-1.14.tar.gz
http://8ballnews.com/main/amusement/IDS/snort.htm
Newer version may be substituted: jpgraph-1.20.tar.gz
http://aditus.nu/jpgraph/jpdownload.php
libpng-1.2.5.tar.gz
http://sourceforge.net/project/showfiles.php?group_id=5624
zlib-1.2.1.tar.gz
http://sourceforge.net/project/showfiles.php?group_id=5624&package_id=14274
or
http://site.n.ml.org/info/zlib/
php-4.3.4.tar.gz
http://www.linuxguruz.com/z.php?id=32&h=php+mysql+apache
For RPMs:
http://www.wesmo.com/rpm2html/x86/php-4.3.10-3.2.i386.html
http://www.wesmo.com/rpm2html/x86/php-devel-4.3.10-3.2.i386.html
http://www.wesmo.com/rpm2html/x86/php-gd-4.3.10-3.2.i386.html
http://www.wesmo.com/rpm2html/x86/php-ldap-4.3.10-3.2.i386.html
http://www.wesmo.com/rpm2html/x86/php-mysql-4.3.10-3.2.i386.html
http://www.wesmo.com/rpm2html/x86/php-pear-4.3.10-3.2.i386.html
openssl-0.9.7d.tar.gz
http://www.openssl.org/source/
mysql-4.0.23.tar.gz
http://downloads.mysql.com/archives.php?p=mysql-4.0&v=4.0.23
Note: The RPM packages for MySQL can be obtained from this link as well