ngrep 1.45 freeware

ngrep strives to provide most of GNU grep's common features, applying them to the network layer. ngrep is a pcap-aware tool that will allow you to specify extended regular or hexadecimal expressions to match against data payloads of packets.

It currently recognizes IPv4/6, TCP, UDP, ICMPv4/6, IGMP and Raw across Ethernet, PPP, SLIP, FDDI, Token Ring and null interfaces.

Author Jordan Ritter
Released 2006-11-18
Filesize 461 kB
Downloads 642
OS Windows 2000, Windows 2003, Windows XP, Linux, Mac OS X
Installation Instal And Uninstall
Keywords network analyzer, network grep, network monitor, monitor, analyze, grep
Users' rating
(7 rating)
ngrepNetwork MonitoringWindows 2000, Windows 2003, Windows XP, Linux, Mac OS X
ngrep - Freeware Download Notice

ngrep Free Download - we do not host any ngrep torrent files or links of ngrep on,, etc. All ngrep download links are direct ngrep download from publisher site or their selected mirrors.

ngrep freeware - The Latest User Reviews
ngrep freeware - The Latest Versions History
1.45 Nov 18, 2006 New Release # fixed bug bug where setting the snaplen smaller than the minimum necessary to read full headers would cause garbage to be fed into the pattern matcher
# fixed unreported bug in IPv6/TCP packet length calculation
# relocated the privilege-dropping routine to be invoked right before entering the packet processing loop, to prevent interference with necessary permissions to read or write dumpfiles/etc.
# fixed integer overflow with the snaplen that resulted from an implicit signed/unsigned conversion
# minor change to compensate for some broken compiler optimizers
# fixed double-free race condition during ngrep termination
# reworked packet length calculation in the main processing loop, improving performance and readability
# simplified regex build logic in configure and Makefile
# updated Win32 version to use config.h for preprocessor definitions instead of the Visual Studio project files, making manual tweaking and config of ngrep for Win32 consistent with *NIX.

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