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GNU SIP Witch is a secure peer-to-peer VoIP server. Calls can be made even behind NAT firewalls, and without needing a service provider. SIP Witch can be used on the desktop to help create bottom-up secure calling networks as a free software alternative to Skype. SIP Witch can also be used as a stand- alone SIP-based office telephone server, or to create secure VoIP networks for an existing IP-PBX such as Asterisk, FreeSWITCH, or Yate.

GNU SIP Witch is also part of GNU Telephony & the GNU Telecom subsystem.


GNU SIP Witch - GNU Telephony

"IRC irc:// " IRC general channel

Heckert gnu.small.png This is a GNU package:sipwitch


Download version 1.9.10 (stable)
released on 7 September 2015

VCS Checkout


Related Projects


LicenseVerified byVerified onNotes
GPLv3orlaterKelly Hopkins16 March 2010

Leaders and contributors

David Sugar Maintainer

Resources and communication

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Software prerequisites

Kind Description
Required to build libeXosip2
Required to build GNU oSIP
Required to build UCommon

This entry (in part or in whole) was last reviewed on 3 October 2015.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.

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