https://community.checkpoint.com/t5/Firewall-and-Security-Management/Data-integrity-for-Phase-2-is-grayed-out-when-using-GCM/m-p/141895#M73018 <P>Using Smart Console R81 build 556.</P><P>I'm running into a specific behavior that I don't know if it's intended or not.</P><P>When I select an AES GCM algorithm for Phase 2 (128 or 256), the data integrity drop-down grays out.</P><P>In order to change the value, I need to select anything else than AES-128-GCM or AES-256-GCM, choose the value then put the algorithm back.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="GCM-data_integrity.png" style="width: 528px;"><img src="https://community.checkpoint.com/t5/image/serverpage/image-id/15439i504E996EABB69EC5/image-size/large?v=v2&amp;px=999" role="button" title="GCM-data_integrity.png" alt="GCM-data_integrity.png" /></span></P><P>&nbsp;</P> Fri, 18 Feb 2022 12:41:22 GMT Alex- 2022-02-18T12:41:22Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/Data-integrity-for-Phase-2-is-grayed-out-when-using-GCM/m-p/141895#M73018 <P>Using Smart Console R81 build 556.</P><P>I'm running into a specific behavior that I don't know if it's intended or not.</P><P>When I select an AES GCM algorithm for Phase 2 (128 or 256), the data integrity drop-down grays out.</P><P>In order to change the value, I need to select anything else than AES-128-GCM or AES-256-GCM, choose the value then put the algorithm back.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="GCM-data_integrity.png" style="width: 528px;"><img src="https://community.checkpoint.com/t5/image/serverpage/image-id/15439i504E996EABB69EC5/image-size/large?v=v2&amp;px=999" role="button" title="GCM-data_integrity.png" alt="GCM-data_integrity.png" /></span></P><P>&nbsp;</P> Fri, 18 Feb 2022 12:41:22 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/Data-integrity-for-Phase-2-is-grayed-out-when-using-GCM/m-p/141895#M73018 Alex- 2022-02-18T12:41:22Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/Data-integrity-for-Phase-2-is-grayed-out-when-using-GCM/m-p/141908#M73019 <P>That is actually correct as GCM has the data integrity already built in:&nbsp;<A href="https://en.wikipedia.org/wiki/Galois/Counter_Mode" target="_blank">Galois/Counter Mode - Wikipedia</A></P> <P>&nbsp;</P> Fri, 18 Feb 2022 13:55:26 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/Data-integrity-for-Phase-2-is-grayed-out-when-using-GCM/m-p/141908#M73019 Marcel_Gramalla 2022-02-18T13:55:26Z