Application to comfortably monitor your Internet traffic
Multithreaded, cross-platform, reliable
🌐 www.sniffnet.net

Graphical interface translated in:
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Help fund Sniffnet's development 💖

Sniffnet is completely free, open-source software which needs lots of effort and time to develop and maintain.

If you appreciate Sniffnet, consider sponsoring: your support will allow me to dedicate more and more time to this project, constantly expanding it including new features and functionalities.

A special mention goes to these awesome organizations and folks who are sponsoring Sniffnet:

           

Installation

You can install Sniffnet in one of the following ways:

from GitHub releases 

You can download the latest version of Sniffnet through the installers available below.
Choose from a Windows Installer, an Apple Disk Image, a DEB package, or an RPM package (depending on your operating system).

Note

If you are unsure which package to download, you should probably choose the first from your operating system list.

Windows

• 64-bit | 32-bit

macOS

• Intel | Apple silicon

Linux

• deb: amd64 | arm64 | i386 | armhf

• rpm: x86_64 | aarch64

from Crates.io 

Follow this method only if you have Rust installed on your machine.
In this case, the application binary can be built and installed with:

cargo install sniffnet

from Homebrew

You can install Sniffnet Homebrew package with:

brew install sniffnet

from Nixpkgs

You can install Sniffnet Nix package adding the following Nix code to your NixOS Configuration, usually located in /etc/nixos/configuration.nix:

environment.systemPackages = [
  pkgs.sniffnet
];

Alternatively, you can install it in your home using Home Manager with:

home.packages = [
  pkgs.sniffnet
];

Alternatively, you can try it in a shell with:

nix-shell -p sniffnet

on Arch Linux

You can install Sniffnet community package via pacman:

pacman -S sniffnet

on FreeBSD

You can install Sniffnet port with:

pkg install sniffnet

on NetBSD

You can install Sniffnet from the official repositories via pkgin:

pkgin install sniffnet

on Tiny Core Linux

You can install Sniffnet from the official repository with:

tce-load -wi sniffnet

Required dependencies

Depending on your operating system, you may need to install some dependencies to run Sniffnet:

Windows dependencies 

In order to correctly build and run Sniffnet on Windows systems you need to:

• Install Npcap, making sure to check the box Install Npcap in WinPcap API-compatible Mode during the installation.

• Download the Npcap SDK.

• Add the SDK's /Lib/x64 (or /Lib) folder to your LIB environment variable.

Note

If you just need to run the app, perform only the first step (second and third steps are required only for the build).

Linux dependencies 

• On Debian-based distributions:
  • libpcap-dev
  • libasound2-dev
  • libfontconfig1-dev
• On RPM-based distributions:
  • libpcap-devel
  • alsa-lib-devel
  • fontconfig-devel

Note

If you just need to run the app, the -dev / -devel part of the dependencies is not needed (it's required only for the build).

Note that if you are not running as root, you need to set capabilities to inspect a network adapter:

sudo setcap cap_net_raw,cap_net_admin=eip <your/Sniffnet/executable/path>

Alternatively you can run the app with sudo privileges:

sudo sniffnet

MacOS dependencies 

MacOS natively has all the dependencies you need to build and run Sniffnet!
However, remember to run the app with administrator privileges: this is needed to analyse the activity of your network device.

Features

• 💻 choose a network adapter of your PC to inspect
• 🏷️ select a set of filters to apply to the observed traffic
• 📖 view overall statistics about your Internet traffic
• 📈 view real-time charts about traffic intensity (bytes and packets per second, incoming and outgoing)
• 🌐 get details about domain names and network providers of the hosts you are exchanging traffic with
• 🏠 identify connections in your local network
• 🌍 get information about the country of the remote hosts (IP geolocation)
• ⭐ save your favorite network hosts
• 🔉 set custom notifications to inform you when defined network events occur
• 🎨 choose the style that fits you the most from 12 different available themes, plus custom theme support
• 🕵️ inspect each of your network connections in real time
• 📁 save complete textual reports with detailed information for each network connection:
  • source and destination IP addresses
  • source and destination ports
  • carried protocols
  • amount of exchanged packets and bytes
  • initial and final timestamp of information exchange
• ... and more!

IP geolocation and network providers (ASN)

See details

Geolocation and network providers (ASN) refer to the remote IP address of each connection. They are retrieved performing lookups against MMDB files:

Note

The MMDB (MaxMind database) format has been developed especially for IP lookup.
It is optimized to perform lookups on data indexed by IP network ranges quickly and efficiently.
It permits the best performance on IP lookups, and it's suitable for use in a production environment.

This product includes GeoLite2 data created by MaxMind, available from https://www.maxmind.com

This file format potentially allows Sniffnet to execute hundreds of different IP lookups in a matter of a few milliseconds.

Supported application layer protocols

See details

Application layer protocols are inferred from the transport port numbers, following the convention maintained by IANA.

Please, remember that this is just a convention:

Warning

The Internet Assigned Numbers Authority (IANA) is responsible for maintaining the official assignments of port numbers for specific uses.
However, many unofficial uses of well-known port numbers occur in practice.

The following table reports the port-to-service mappings used by Sniffnet, chosen from the most common assignments by IANA.

Port number(s)	Application protocol	Description
20, 21	FTP	File Transfer Protocol
22	SSH	Secure Shell
23	Telnet	Telnet
25	SMTP	Simple Mail Transfer Protocol
49	TACACS	Terminal Access Controller Access-Control System
53	DNS	Domain Name System
67, 68	DHCP	Dynamic Host Configuration Protocol
69	TFTP	Trivial File Transfer Protocol
80, 8080	HTTP	Hypertext Transfer Protocol
109, 110	POP	Post Office Protocol
123	NTP	Network Time Protocol
137, 138, 139	NetBIOS	NetBIOS
143, 220	IMAP	Internet Message Access Protocol
161, 162, 199	SNMP	Simple Network Management Protocol
179	BGP	Border Gateway Protocol
389	LDAP	Lightweight Directory Access Protocol
443	HTTPS	Hypertext Transfer Protocol over SSL/TLS
636	LDAPS	Lightweight Directory Access Protocol over TLS/SSL
989, 990	FTPS	File Transfer Protocol over TLS/SSL
993	IMAPS	Internet Message Access Protocol over TLS/SSL
995	POP3S	Post Office Protocol 3 over TLS/SSL
1900	SSDP	Simple Service Discovery Protocol
5222	XMPP	Extensible Messaging and Presence Protocol
5353	mDNS	Multicast DNS

Keyboard shortcuts

See details

Some keyboard shortcuts are available to improve the efficiency of use and the overall user experience.

If you want to suggest a different key combination for one of the existing shortcuts or if you want to propose a new shortcut, have a look at this issue.

The currently usable hotkeys are reported in the following.

Note

On macOS, use the cmd key instead of ctrl

Event	Shortcut keys
Quit the application	ctrl+Q
Open full report	ctrl+O
Open settings	ctrl+,
Clear all notifications	ctrl+D
Interrupt the ongoing analysis	ctrl+backspace
Start the analysis and confirm modal actions	enter
Close settings and modal popups	esc
Switch from a tab to the next (or previous) one	tab (or shift+tab)
Change inspect connections page to the next (or previous) one	ctrl+rightArrow (or ctrl+leftArrow)

Custom themes

See details

Custom themes are specified as a TOML file.

The TOML must follow this format:

# Colors are in RGB/RGBA hexadecimal.
primary = "#303446"           # Background
secondary = "#a6d189"         # Headers / incoming connections
buttons = "#414559"           # Buttons
outgoing = "#f4b8e4"          # Outgoing connections
text_headers = "#232634"      # Text headers
text_body = "#c6d0f5"         # Text body
starred = "#e5c890aa"         # Favorites

# The following parameters are in the range [0.0, 1.0].
round_borders_alpha = 0.4     # Borders opacity
round_containers_alpha = 0.25 # Containers opacity
chart_badge_alpha = 0.2       # Chart opacity

# Set to true if the theme is dark, false if it's light.
nightly = true

The example theme above uses colors from Catppuccin.

To use a custom theme for your instance of Sniffnet, specify the path of your TOML file in the application's settings (at the bottom of the style tab).

Troubleshooting

See details

Missing dependencies

Most of the errors that can occur are likely due to your system missing required pcap dependencies, necessary to correctly analyze a network adapter.
Check the required dependencies section for instructions on how to proceed, depending on your operating system.

Rendering problems

In some circumstances, especially if you are running on an old architecture or your graphical drivers are not up-to-date, the wgpu default renderer used by iced may cause problems (country icons are completely black, or the interface glitches).
In these cases you can download an alternative version of the application, which is based on tiny-skia, a CPU-only software renderer that should work properly on every environment:
Windows | macOS | Linux DEB | Linux RPM

In any case don't hesitate to open an issue, and I will do my best to help you!

Acknowledgements

• A big shout-out to all the contributors of Sniffnet!

• The graphical user interface has been realized with iced, a cross-platform GUI library for Rust focused on simplicity and type-safety

• Last but not least, thanks to every single stargazer: all forms of support made it possible to keep improving Sniffnet!