Attention SNORTⓇ users and integrators:
This blog post serves as the official announcement that Snort version 2.9.15.0 has officially reached its end of life. We first announced this EOL period in March. Users are encouraged to update to a more recent version of Snort as soon as possible if they are still using 2.9.15.0.
However, version 2.9.16.0 remains active, as there are still external commitments. Though users should still upgrade from that version as soon as they are able to.
As we release new versions of Snort, occasionally we have to decommission older versions, lowering our amount of maintenance to building the ruleset for these different versions. We continually review the usage of versions and try to strive to only keep the most actively used versions around. There are several older Snort rule integrators that are using very old versions (2.9.8.3 for example), which is the reason those versions are still around. However, we are actively working with these partners to move them to more current versions of Snort.
If you are using an older version of Snort, we encourage you to please start your upgrades to 2.9.17.1 or Snort 3.