2ping - A bi-directional ping utility

https://www.finnie.org/software/2ping/

About

2ping is a bi-directional ping utility. It uses 3-way pings (akin to TCP SYN, SYN/ACK, ACK) and after-the-fact state comparison between a 2ping listener and a 2ping client to determine which direction packet loss occurs.

Installation

2ping requires Python 3 version 3.10 or higher.

To install 2ping with all optional dependencies as a pipx package:

pipx install '.[full]'

Python 3 stdlib is the only requirement for base functionality, but 2ping can utilize the following modules if available:

• distro for system distribution detection
• dnspython for --srv
• netifaces for listening on all addresses in --listen mode
• pycryptodomex (recommended) or pycryptodome or pycrypto for --encrypt
• systemd for using systemd-supplied sockets

Usage

Please see the 2ping manpage for invocation options, but in short, start a listener on the far end:

2ping --listen

And run 2ping on the near end, connecting to the far end listener:

2ping $LISTENER

Where "$LISTENER" is the name or IP address of the listener.

License

2ping - A bi-directional ping utility

Copyright (C) 2010-2025 Ryan Finnie

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

This document is provided under the following license:

SPDX-PackageName: 2ping
SPDX-PackageSupplier: Ryan Finnie <ryan@finnie.org>
SPDX-PackageDownloadLocation: https://codeberg.org/rfinnie/2ping
SPDX-FileCopyrightText: © 2010 Ryan Finnie <ryan@finnie.org>
SPDX-License-Identifier: CC-BY-SA-4.0