diff -Naur libreswan-4.1-orig/configs/d.ipsec.conf/ikev2.xml libreswan-4.1/configs/d.ipsec.conf/ikev2.xml
--- libreswan-4.1-orig/configs/d.ipsec.conf/ikev2.xml	2020-10-18 21:11:05.000000000 -0400
+++ libreswan-4.1/configs/d.ipsec.conf/ikev2.xml	2020-10-27 23:31:41.943387992 -0400
@@ -1,15 +1,15 @@
   <varlistentry>
   <term><emphasis remap='B'>ikev2</emphasis></term>
   <listitem>
-<para>Whether to use IKEv1 (RFC 4301) or IKEv2 (RFC 7296) settings to be used.
-Currently the accepted values are <emphasis remap='B'>no</emphasis>(the default),
-signifying only IKEv1 is accepted, or <emphasis remap='B'>yes</emphasis>,
+<para>Wether to use IKEv1 (RFC 4301) or IKEv2 (RFC 7296) as the Internet Key Exchange (IKE) protcol.
+Currently the accepted values are <emphasis remap='B'>no</emphasis> (or <emphasis remap='B'>never</emphasis>)
+signifying only IKEv1 is accepted, or <emphasis remap='B'>insist</emphasis>(the default),
 signifying only IKEv2 is accepted. Previous versions allowed the keywords
-<emphasis remap='B'>propose</emphasis> or <emphasis remap='B'>permit</emphasis>
-that would allow either IKEv1 or IKEv2, but this is no longer supported. The
-permit option is interpreted as no and the propose option is interpreted as
-yes. Older versions also supported keyword
-<emphasis remap='B'>insist</emphasis> which is now interpreted as yes.
+<emphasis remap='B'>propose</emphasis>, <emphasis remap='B'>yes</emphasis> or <emphasis remap='B'>permit</emphasis>
+that would allow either IKEv1 or IKEv2, but this is no longer supported and both options
+now cause the connection to fail to load. <emphasis remap='B'>WARNING:</emphasis> This behaviour differs from upstream
+libreswan, which only accepts <emphasis remap='B'>yes</emphasis> or <emphasis remap='B'>no</emphasis> where yes means
+the same as insist.
 </para>
   </listitem>
   </varlistentry>
diff -Naur libreswan-4.1-orig/lib/libipsecconf/confread.c libreswan-4.1/lib/libipsecconf/confread.c
--- libreswan-4.1-orig/lib/libipsecconf/confread.c	2020-10-18 21:11:05.000000000 -0400
+++ libreswan-4.1/lib/libipsecconf/confread.c	2020-10-27 23:28:15.199171781 -0400
@@ -1299,13 +1299,16 @@
 
 		switch (conn->options[KNCF_IKEv2]) {
 		case fo_never:
-		case fo_permit:
 			conn->policy |= POLICY_IKEV1_ALLOW;
 			/* clear any inherited default */
 			conn->policy &= ~POLICY_IKEV2_ALLOW;
 			break;
-
+		case fo_permit:
+			starter_error_append(perrl, "ikev2=permit is no longer accepted. Use ikev2=insist or ikev2=no|never");
+			return TRUE;
 		case fo_propose:
+			starter_error_append(perrl, "ikev2=propose or ikev2=yes is no longer accepted. Use ikev2=insist or ikev2=no|never");
+			return TRUE;
 		case fo_insist:
 			conn->policy |= POLICY_IKEV2_ALLOW;
 			/* clear any inherited default */
diff -Naur libreswan-4.1-orig/programs/whack/whack.c libreswan-4.1/programs/whack/whack.c
--- libreswan-4.1-orig/programs/whack/whack.c	2020-10-18 21:11:05.000000000 -0400
+++ libreswan-4.1/programs/whack/whack.c	2020-10-27 23:33:01.065215832 -0400
@@ -780,7 +780,7 @@
 	PS("ikev1-allow", IKEV1_ALLOW), /* obsolete name */
 	PS("ikev2", IKEV2_ALLOW),
 	PS("ikev2-allow", IKEV2_ALLOW), /* obsolete name */
-	PS("ikev2-propose", IKEV2_ALLOW), /* obsolete, map onto allow */
+	/* not in RHEL8 PS("ikev2-propose", IKEV2_ALLOW), */
 
 	PS("allow-narrowing", IKEV2_ALLOW_NARROWING),
 #ifdef XAUTH_HAVE_PAM
@@ -1707,7 +1707,7 @@
 
 		/* --ikev1 */
 		case CDP_SINGLETON + POLICY_IKEV1_ALLOW_IX:
-		/* --ikev2 (now also --ikev2-propose) */
+		/* --ikev2 */
 		case CDP_SINGLETON + POLICY_IKEV2_ALLOW_IX:
 
 		/* --allow-narrowing */