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Libreswan vs ocserv: catalog facts
Libreswan	ocserv
Free Free software under GPLv2.	Free Free and open source under GPLv2.
macOS, Linux, Command line	Linux, Self-hosted
Standards-based IPsec with IKEv1 and IKEv2 Packaged in Fedora, RHEL/EPEL and Arch Linux	Works with OpenConnect and AnyConnect-compatible clients Radius, OpenID Connect, Kerberos and smart card authentication
IPsec configuration has a steep learning curve No graphical interface	Linux server only Needs network and authentication setup experience
Downloadable app	Self-hosted
Open source	Open source
License: GPL-2.0	License: GPL-2.0
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.