#!/bin/sh
# Display foreign IP addresses coming from port 8333 --or-- connected to local port 8333.
# Append line at end with date and count of addresses displayed.

netstat -an |
awk -v date="$(date)" '$6 == "ESTABLISHED" && /:8333/ { split($5, a, ":"); print a[1] ; n++ }
END { print "# " date " : " n " bitcoin clients seen." }'