Wireshark Network Protocol Analyzer

Uncovers Network's Secrets!

Wireshark can capture all network traffic

 The Ethereal network protocol analyzer has changed its name to Wireshark. The name might be new, but the software is the  same. Wireshark's powerful features make it the tool of choice for network troubleshooting, protocol development, and education worldwide.

 Wireshark (also known as Ethereal) is a network protocol analyzer that enables you to capture and examine data from a live network or from a capture file on disk. You can interactively browse the capture data and view summary and detail information for each packet. Wireshark has several powerful features, including a rich display filter language and the ability to view the reconstructed stream of a TCP session. It can read capture files from tcpdump (libpcap), NAI Sniffer (compressed and uncompressed), Sniffer Pro, NetXray, snoop, Shomiti Surveyor, AIX s iptrace, Microsoft Network Monitor, Novell s LANalyzer, RADCOM s WAN/LAN Analyzer, HP-UX nettl, ISDN4BSD, Cisco Secure IDS iplog, the pppd log (pppdump-format), and the AG Group s/Wildpacket Etherpeek. It can also read traces made from Lucent/Ascend WAN routers and Toshiba ISDN routers. Any of these files can be compressed with gzip and Wireshark will decompress them on the fly.

 Inroduction

 Applying Ping Tool in SCRIPT:

Ping is a universal command that is available on every operating system to test the reach-ability of a network.This principle can be used to check the existence of certain machines on the network by just using ping. To find which all machine are up in the current network,we write shell script. Open the vi editor as superuser/root and write the following lines in it.

Advanced Pinging technique:

About ping

Sends ICMP ECHO_REQUEST packets to network hosts.