Set the SameSite Attribute for LTM Persistence Cookies
Published Feb 06, 2020
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Hi Orlando,
There is a link in this article to a v11 compatible version on github:
https://github.com/f5devcentral/irules-toolbox/blob/master/security/http/cookies/samesite-attributes-pre-v12.tcl
The latter iRule will work for v11, but uses more CPU cycles because we don't have the HTTP::cookie attribute sub-command until v12.0. If at all possible, I'd suggest upgrading your v11.5 BIG-IPs to a supported software version. v11.5 has reached End of Software Development in 2019 and therefore doesn't get security fixes. End of Technical Support for v11.5 is coming in April:
K5903: BIG-IP software support policy
https://support.f5.com/csp/article/K5903
Aaron