pj-net-tools

Pure Java Network Tools. Free portable cross-platform.
Include:

01) ICMP-ping,
02) ICMP-traceroute,
03) DNS-check resolver,
04) Parallel Host TCP-scanner,
05) IP-calculator,
06) Syslog-server,
07) Telnet-client,
08) Local ARP-cache request,
09) Parallel Network Ping-Scanner,
10) Snmp-Get concrete value utility.
11) Parallel ICMP flood utility.
12) Parallel UDP flood utility.
13) TFTP-server.
14) NTP-server.
15) Host TCP-ping.
16) SNMP-MRTG traffic monitor.
17) Anonymous FTP-server.
18) Parallel Network TCP-scanner.
19) Parallel Network SNMP-scanner.
20) Parallel Network DNS-scanner.
21) Parallel SNMP-DoS.
22) Parallel HTTP/HTTPS-DoS
Need JRE-1.8:

https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html .
Source - https://github.com/harp077/pj-net-tools .
If you like this - put a star on https://github.com/harp077/pj-net-tools