Werk #19421: fix: Pure storage agent not sending SNI

Component

Checks & agents

Title

fix: Pure storage agent not sending SNI

Date

Feb 17, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.6.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.5.0b1 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0p23 Not yet released	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)
2.3.0p43	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

The Pure Storage Flash Array special agent now properly implements Server Name Indication (SNI) during TLS handshakes when using the --cert-server-name option.

When connecting to Pure Storage devices by IP address while specifying a hostname via --cert-server-name, the agent failed to properly communicate the expected hostname during the SNI portion of the TLS handshake.

The agent now properly implements SNI by setting both the hostname validation and the server hostname for SNI negotiation, following urllib3 best practices. This ensures the correct certificate is requested and validated during connection establishment.

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