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strongswan-ext/testing/tests/ikev1/esp-alg-strict-fail/description.txt
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The roadwarrior <b>carol</b> proposes <b>3DES</b> encryption with SHA-1 authentication
as the only cipher suite for both the ISAKMP and IPsec SA. The gateway <b>moon</b> defines
<b>ike=aes-128-sha</b> only, but will accept any other support algorithm proposed by the peer,
leading to a successful negotiation of Phase 1. Because for Phase 2 <b>moon</b> enforces
<b>esp=aes-128-sha1!</b> by using the strict flag '!', the ISAKMP SA will fail.