--- /dev/null
+#!/bin/sh
+# Received packets collection script.
+# Run this script on @@S as root, saying:
+# ./on-dest.sh PART [<other tcpdump options>]
+# where PART ranges from 1 to 100
+
+if [ $# -lt 1 ]; then echo >&2 'PART?'; exit 1; fi
+part=$1; shift
+
+exec tcpdump -ps@@M -w recv-$part.pcap "$@" \
+ src host @@S and dst host @@D