echo -n "Verifying $host:$port ... " timeout $TIMEOUT_SEC nc -zv $host $port 2>/dev/null if [ $? -ne 0 ]; then echo "FAIL (Port closed)" echo "$host,$port,N/A,PortClosed,0" >> $OUTPUT_FILE continue fi Step 2: Version and basic test VERSION=$(timeout $TIMEOUT_SEC netperf -H $host -p $port -t NULL -v 2 2>&1 | grep "netserver revision" | awk 'print $4')
#!/bin/bash # verify_netperf_servers.sh # Input: servers.txt (one IP:port per line) # Output: verified_servers.csv INPUT_FILE="servers.txt" OUTPUT_FILE="verified_netperf_list.csv" TIMEOUT_SEC=5 TEST_DURATION=2 netperf server list verified
netperf -H <server_ip> -p 12865 -v 2 -t NULL Look for the line: Netperf server on <server_ip>: netserver revision x.x.x . This confirms the exact version. Manually verifying 20 servers is tedious. Here is a bash script that automates verification and outputs a clean, verified list in CSV format. echo -n "Verifying $host:$port
while IFS=: read -r host port; do if [ -z "$port" ]; then port=12865 fi This confirms the exact version
# /etc/cron.daily/refresh_netperf_list #!/bin/bash /opt/netperf-tools/verify_netperf_servers.sh /opt/netperf-tools/alert_on_failure.sh # Send Slack alert if >20% servers fail If you run a private fleet of netserver hosts, build a lightweight HTTP endpoint that returns the current status:
done < "$INPUT_FILE"
echo "Verification complete. Verified list saved to $OUTPUT_FILE"