A simple daemon to make sure that another daemon is always running. Similar to the 'respawn' feature of /etc/inittab.

I use this to track traffic usage on my Internet link. It uses libpcap to sniff packets and count which of my addresses each belongs to. The output of this program is fed to rrdtool for archiving and display.

tcpdump-like application that displays (via curses) various tables of DNS messages, such as sources, destinations, first and second level domains, and query types.

A simple host monitoring program with HTTP/HTML output.

A perl script that produces daily HTTP access log reports.

Turns each line of input into an MD5 hash.

Curses-based ICMP ping of multiple hosts.

I use this to see what type of packets are entering and leaving my servers. It uses libpcap to sniff packets and assign each one to a particular port or protocol. The output of this program is fed to rrdtool for archiving and display.

A tcpdump knockoff that outputs some stats about packet sizes (mean, median).

A TCP tunnel.

I use this to test a malloc library implementation.

I use this program to find faulty RAM or related problems. It allocates chunks of memory and fills the space with known values. Then it loops and reads back the memory looking for changed values.

A reverse-traceroute inetd daemon, and a CGI program for querying a number of remote traceroute servers.

Split and merge tcpdump/pcap files.