iperf-3.20 is available

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Sarah Larsen

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Nov 14, 2025, 5:30:20 PM (12 days ago) Nov 14
to iperf...@lists.sourceforge.net, perfson...@internet2.edu, perfsonar...@internet2.edu, iper...@googlegroups.com
ESnet (Energy Sciences Network) is proud to announce the release of
iperf-3.20. This release includes several bug fixes, including 
changes to the --zerocopy, --json-stream, --time, and --rcv-timeout
options. In the library, it is now possible to use the API to load 
RSA keys from a file.

More information on these changes can be found in the
iperf-3.20 release notes, which are contained in the RELNOTES.md file
in the distribution.

iperf-3.20 should be fully backward-compatible with prior iperf3
releases, that is, iperf-3.20 clients and servers should
interoperate correctly with all 3.x clients and servers.

The source code for iperf-3.20 is available at:

https://downloads.es.net/pub/iperf/iperf-3.20.tar.gz

SHA256 hash:

3acc572d1ecca4e0b20359c7bf0132ddc80d982efeee20c86f6726a9a6094388

iperf3 is freely-redistributable under a 3-clause BSD license.  More
information can be found in the LICENSE file inside the source
distribution.

Additional documentation: https://software.es.net/iperf

Source code and issue tracker: https://github.com/esnet/iperf

Discussion forums: https://github.com/esnet/iperf/discussions

Reporting security issues: ip...@es.net

User questions can go to the iperf users list (which is more-or-less
shared between iperf2 and iperf3):

iperf...@lists.sourceforge.net

Mailing list information and archives can be found at:

https://lists.sourceforge.net/lists/listinfo/iperf-users

The mailing list for iperf3 development is:

iper...@googlegroups.com

To see the list archives or join the mailing list, visit:

http://groups.google.com/group/iperf-dev
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