ear trumpet
ear trumpet is a two part application, ear and trumpet. ear is a listener which will listen on specified ports for connections and answer any connection requests. trumpet is client which will try to connect to a range of specified ports on a given host.
The idea behind it is for testing firewalls to see what ports they will allow through, you run ear on one side as a listener then run trumpet on the other. ear will report all the ports that were allowed through.
Download
download ear trumpet version 1
Installation
Save the files and make them executable, apart from ruby no gems or libraries are required.
Usage
Usage: trumpet [OPTION] ... SERVER
--help, -h: show help
--start x, -s x: start port, default 1
--end x, -e x: end port, default 1024
--timeout x, -t x: timeout for connection in seconds, default 1
--sleep x, -p x: sleep between starting conections, default 0.1
--report-open, -o: report open ports
--report-closed, -c: report closed ports
-v: verbose
SERVER: The server name or ip.
Usage: ear [OPTION]
--help, -h: show help
--start x, -s x: start port, default 1
--end x, -e x: end port, default 1024
-v: verbose
Bugs/Limitations
This is version 1 and has been written fairly quicky and not fully bug tested but does work in most tests. It occasionally throws an error on closing after scanning a large number of ports, this doesn't seem to affect the scan and the results do appear to still be correct.
I can only open 1000 ports at a time, I assume that this is a limit set by linux and it is probably possible to increase this but I haven't had chance to investigate this.
If you find any bugs or want to report any problems you can contact me.
