Hacking / Security links : 
http://www.alldas.de
http://www.antioffline.com
http://www.attrition.org
http://come.to/bchicken
http://www.blacknemesis.org
http://blacksun.box.sk
http://www.cotse.com
http://www.checksum.org
http://www.cyberarmy.com
http://www.doshelp.com
http://www.dsinet.org
http://www.hackershomepage.com
http://www.hackernews.com
http://www.hackpalace.com
http://www.hwa-security.net
http://www.infosyssec.com
http://www.l0pht.com/
http://www.net-security.org/
http://www.rootprompt.org
http://www.safemode.org/
http://www.security.nl
http://www.securityfocus.com
http://www.securityportal.com
http://www.securologix.com
http://www.slashdot.org
http://www.startplaza.nu
http://www.technotronic.com

Textfiles / Good reading links : 
http://black.box.sk
http://blacksun.box.sk ==> http://guide.box.sk
http://www.b0g.org
http://www.howtos.nl
http://neworder.box.sk
http://user.tninet.se/%7Eztk135s/nophun
http://www.itsecurity.com
http://www.enteract.com/~lspitz/pubs.html
http://www.textfiles.com
http://viper.dmrt.com

Programming links : 
http://www.howtos.nl
http://www.mysql.com
http://www.programmersheaven.com
http://protools.cjb.net
http://www.php.net
http://www.perlarchive.com
http://www.phpbuilder.com
http://reversing.is-here.net

Some general (good information) links :
http://www.nightflight.com/foldoc/
http://www.cisco.com/cpress/cc/td/cpress/fund/ith/ith01gb.htm
http://ipindex.dragonstar.net
http://nielsen.uni-c.dk/fujitsu.docs/C/nua/index.htm
http://www.stim.tec.tn.us/arc/links_4.htm

Linux links : 
http://www.caldera.com
http://www.corel.com/linux/
http://www.debian.org
http://www.linux.org
http://linux.pagina.nl
http://www.linux.com
http://www.linux-mandrake.com/
http://www.redhat.com
http://www.slackware.com
http://www.linux-firewall-tools.com/linux/
http://www.suse.com/
http://www.cslug.net/~jtmurphy/
http://ldrolez.free.fr/secu/

Crack links : 
http://astalavista.box.sk/
http://come.to/cracksearcher/
http://zor.org/qcf/
http://www.ilsearch.com/
http://www.elitetoplist.com/wkt/
http://vikingcrack.mtv.to/
http://www.ucf2000.com/
http://www.hack.b3.nu/
http://ffo2000.cjb.net/

Hacking newsgroups : 
news:alt.hack 
news:alt.hack.nl 
news:alt.hacker
news:alt.hackers 
news:alt.hackers.malicious 
news:alt.hacking
news:alt.phreak.nl 
news:alt.phreaking 
news:alt.2600
news:alt.2600.hackerz
news:alt.2600.hackers

Security newsgroups : 
news:alt.security 
news:alt.security.announce
news:comp.os.linux.security
news:comp.os.ms-windows.nt.admin.security 
news:comp.security.misc
news:comp.security.announce 
news:comp.security.ssh
news:comp.security.unix

Cracking newsgroups : 
news:alt.2600.cracks 
news:alt.2600.crackz
news:alt.crack 
news:alt.crackers 
news:alt.cracks 
news:alt.cracks.nl

Warez newsgroups : 
news:alt.warez 
news:alt.warez.apps
news:alt.warez.ibm-pc

Almost _ALL_ FAQ's : ftp://rtfm.mit.edu/pub/usenet-by-hierarchy/
alt.hacking FAQ : http://alt-hacking.virtualave.net/FAQ/

http://www.tuxedo.org/~esr/faqs/hacker-howto.html
http://ldrolez.free.fr/secu/
http://www.enteract.com/~lspitz/pubs.html
http://www.securax.org/main-download.html
http://www.linux-firewall-tools.com/linux/
http://www.cslug.net/~jtmurphy/
http://www.monumental.com/boat/booksIndex.html
http://www.ehap.org

Digital Overdrive
Mail broken links : mailto:jan@magnificus.selwerd.nl?subject=Broken%20Links
-- 
Alt.hack.nl FAQ : http://www.dsinet.org/hackfaq
Dutch Security Information Network : http://www.dsinet.org
E-mail : digiover@dsinet.org
IRCNet : #dsinet