Dear colleagues,

We're happy to announce the release of the RIPE Atlas Software Probe, version 
5130.

This 5130 release contains the following main changes:

- Fix NTP measurement offset (GH-130), a regression from the 5120 fix: it 
reported half the round-trip time instead of the clock offset
- Move to new registration servers with ed25519 keys
- Modernise the Debian apt repository (ripe-atlas-repo 1.6-1): deb822 .sources 
format and a Signed-By-scoped signing key, fixing the apt warnings on Debian 13
- Add the openwrt-hwprobe architecture as a common base for the next-generation 
hardware probe firmware
- Measurement code
  - Add a minimum gap between NTP requests, 4000 ms by default (GH-114)
  - Send the NTP RIPE reference-id in network byte order, correcting it on 
big-endian architectures
  - Use the MAC address from the default-route interface
  - Use environment-specific SOS servers for SOS calls
  - Support both iproute2 and net-tools (reported by Paul Menzel, GH-147, 
GH-148)
- Other
  - Change default SSH key pair algorithm to ed25519
  - Pre-fill the probe's public key in the post-install registration URL
  - Fix RHEL and Debian packaging (dependencies, maintainer scripts, apt 
changelog)
  - Add libssl3t64 for Debian 13 (authored by Dreista, GH-139)
  - Fix the OpenWrt package build on 24.10 and 25.12 (GH-146)
  - Hardware probe fixes: boot from saved network configuration, reginit 
upgrade, update checksums
  - Fix typo in HTTP_POST_PORT configuration entry (authored by 
Firefishy/Grant, GH-141)
  - Wrap over-long help text in evtdig (authored by commodo/Alexandru Ardelean, 
GH-149)
  - Internal cleanups and CI changes

Please note that NTP offsets reported by 5120 are incorrect. The reported 
round-trip time is unaffected.

This is also the last release supporting Debian 11, given that its LTS will end 
on 31 August 2026.

This release only applies to software probes. An update will be released for 
hardware probes once OpenWrt consolidation work is complete.

The full release notes are available in the documentation:
https://atlas.ripe.net/docs/releases/firmware_index/5130

You can find more information and instructions on the GitHub repository:
https://github.com/RIPE-NCC/ripe-atlas-software-probe/
https://github.com/RIPE-NCC/ripe-atlas-software-probe/releases/tag/5130

Please let us know if you find any issues with this release.

Kind regards,
Trix Taiclet
Embedded Systems Engineer @ RIPE Atlas
RIPE NCC
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