This site has very interesting and excellent tutorials on networking and configuring all the network services like Apache(http),FTP,SAMBA,Proxy server,DNS, Mailservers etc. and securing with "IPTables, TCP Wrappers" in GNU/Linux for newbies.
Visit: http://www.linuxhomenetworking.com/
For advance topics there is always:
http://www.tldp.org
Regards.
Visit: http://www.linuxhomenetworking.com/
For advance topics there is always:
http://www.tldp.org
Regards.