Hitchhiker's Guide to the Internet is a German introduction to the technical aspects of the Internet. This book explains both the low-level protocols IP, ICMP, TCP, and UDP and the high-level protocols SMTP, POP3, IMAP4, NNTP, HTTP, Gopher, FTP, IRC, DICT, Finger, Daytime, DNS, and Whois.
Sentinel provides statistical and operator services for EFnet, IRCnet, and Dalnet IRC daemons. It supports Hybrid/Comstud (5, 6, 7, comstud 1.x, CSr, csircd, ircd-ratbox), and Bahamut. It features a StatServ, a SplitServ, flood protection, customized HTML output, a Jupe service, a channel search engine, and a number of drone/clone tracking tools. It fully supports many Hybrid 6 and 7 extensions.