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 663
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.

Most popular Network Monitoring freeware downloads

FinitySoft Network Monitor freeware download

Displays real time information about all network adapters. Freeware!

New Version

Wireshark (x32bit)

3.6.16 freeware download

Free network protocol analyzer for Windows

Wireshark (x64bit)

4.0.8 freeware download

Free network protocol analyzer for Windows (x64bit)

Wireshark for Mac OS X

4.0.8 freeware download

Free network protocol analyzer for Mac OS X


1.68.2 freeware download

Tool for monitoring network traffic (bandwidth) on selected interfaces

5 freeware award


1.1.21 freeware download

LAN activity lights for Windows 95/98 after upgrading to DSL or Cable

The Dude

7.11.2 freeware download

Scan your network, make a layout map, and start monitoring services


2.75 freeware download

Displays the list of all currently opened TCP/UDP ports on your computer.


2.50 freeware download

Displays network traffic statistics on your network adapter

Server Check Monitoring System

1.5 freeware download

Server Check monitors your websites & web-based services and alerts you