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diff -up librelp-1.10.0/src/tcp.c.crypto-compliance librelp-1.10.0/src/tcp.c
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--- librelp-1.10.0/src/tcp.c.crypto-compliance	2021-02-16 09:07:24.000000000 +0100
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+++ librelp-1.10.0/src/tcp.c	2021-08-17 10:13:53.368936612 +0200
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@@ -1155,32 +1155,8 @@ static relpRetVal LIBRELP_ATTR_NONNULL()
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 relpTcpTLSSetPrio_gtls(relpTcp_t *const pThis)
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 {
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 	int r;
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-	char pristringBuf[4096];
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-	char *pristring;
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 	ENTER_RELPFUNC;
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-	/* Set default priority string (in simple cases where the user does not care...) */
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-	if(pThis->pristring == NULL) {
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-		if (pThis->authmode == eRelpAuthMode_None) {
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-			if(pThis->bEnableTLSZip) {
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-				strncpy(pristringBuf, "NORMAL:+ANON-DH:+COMP-ALL", sizeof(pristringBuf));
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-			} else {
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-				strncpy(pristringBuf, "NORMAL:+ANON-DH:+COMP-NULL", sizeof(pristringBuf));
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-			}
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-			pristringBuf[sizeof(pristringBuf)-1] = '\0';
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-			pristring = pristringBuf;
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-			r = gnutls_priority_set_direct(pThis->session, pristring, NULL);
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-		} else {
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-			r = gnutls_set_default_priority(pThis->session);
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-			strncpy(pristringBuf, "to recommended system default", sizeof(pristringBuf));
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-			pristringBuf[sizeof(pristringBuf)-1] = '\0';
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-			pristring = pristringBuf;
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-		}
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-
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-	} else {
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-		pristring = pThis->pristring;
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-		r = gnutls_priority_set_direct(pThis->session, pristring, NULL);
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-	}
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-
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+	r = gnutls_set_default_priority(pThis->session);
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 	if(r == GNUTLS_E_INVALID_REQUEST) {
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 		ABORT_FINALIZE(RELP_RET_INVLD_TLS_PRIO);
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 	} else if(r != GNUTLS_E_SUCCESS) {
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@@ -1188,7 +1164,7 @@ relpTcpTLSSetPrio_gtls(relpTcp_t *const
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 	}
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 finalize_it:
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-	pThis->pEngine->dbgprint((char*)"relpTcpTLSSetPrio_gtls: Setting ciphers '%s' iRet=%d\n", pristring, iRet);
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+	pThis->pEngine->dbgprint((char*)"relpTcpTLSSetPrio_gtls: Setting ciphers to system default iRet=%d\n", iRet);
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 	if(iRet != RELP_RET_OK) {
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 		chkGnutlsCode(pThis, "Failed to set GnuTLS priority", iRet, r);
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@@ -1207,38 +1183,15 @@ relpTcpTLSSetPrio_gtls(LIBRELP_ATTR_UNUS
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 static relpRetVal LIBRELP_ATTR_NONNULL()
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 relpTcpTLSSetPrio_ossl(relpTcp_t *const pThis)
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 {
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-	char pristringBuf[4096];
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-	char *pristring;
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 	ENTER_RELPFUNC;
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-	/* Compute priority string (in simple cases where the user does not care...) */
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-	if(pThis->pristring == NULL) {
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-		if (pThis->authmode == eRelpAuthMode_None) {
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-			#if OPENSSL_VERSION_NUMBER >= 0x10100000L \
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-				&& !defined(LIBRESSL_VERSION_NUMBER)
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-			 /* NOTE: do never use: +eNULL, it DISABLES encryption! */
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-			strncpy(pristringBuf, "ALL:+COMPLEMENTOFDEFAULT:+ADH:+ECDH:+aNULL@SECLEVEL=0",
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-				sizeof(pristringBuf));
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-			#else
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-			strncpy(pristringBuf, "ALL:+COMPLEMENTOFDEFAULT:+ADH:+ECDH:+aNULL",
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-				sizeof(pristringBuf));
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-			#endif
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-		} else {
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-			strncpy(pristringBuf, "DEFAULT", sizeof(pristringBuf));
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-		}
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-		pristringBuf[sizeof(pristringBuf)-1] = '\0';
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-		pristring = pristringBuf;
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-	} else {
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-		/* We use custom CipherString if used sets it by SslConfCmd */
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-		pristring = pThis->pristring;
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-	}
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-	if ( SSL_set_cipher_list(pThis->ssl, pristring) == 0 ){
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-		pThis->pEngine->dbgprint((char*)"relpTcpTLSSetPrio_ossl: Error setting ciphers '%s'\n", pristring);
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+	if (SSL_set_cipher_list(pThis->ssl, "PROFILE=SYSTEM") == 0){
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+		pThis->pEngine->dbgprint((char*)"relpTcpTLSSetPrio_ossl: Error setting ciphers to system default\n");
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 		ABORT_FINALIZE(RELP_RET_ERR_TLS_SETUP);
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 	}
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 finalize_it:
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-	pThis->pEngine->dbgprint((char*)"relpTcpTLSSetPrio_ossl: Setting ciphers '%s' iRet=%d\n", pristring, iRet);
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+	pThis->pEngine->dbgprint((char*)"relpTcpTLSSetPrio_ossl: Setting ciphers to system default iRet=%d\n", iRet);
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 	LEAVE_RELPFUNC;
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 }
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 #else