diff --git a/ospfd/ospf_vty.c b/ospfd/ospf_vty.c

index 631465f..e084ff3 100644

--- a/ospfd/ospf_vty.c

+++ b/ospfd/ospf_vty.c

@@ -1136,6 +1136,11 @@ DEFUN (ospf_area_vlink,

 	if (argv_find(argv, argc, "message-digest", &idx)) {

 		/* authentication message-digest */

+		if(FIPS_mode())

+		{

+			vty_out(vty, "FIPS mode is enabled, md5 authentication is disabled\n");

+			return CMD_WARNING_CONFIG_FAILED;

+		}

 		vl_config.auth_type = OSPF_AUTH_CRYPTOGRAPHIC;

 	} else if (argv_find(argv, argc, "null", &idx)) {

 		/* "authentication null" */

@@ -1993,6 +1998,15 @@ DEFUN (ospf_area_authentication_message_digest,

 				  ? OSPF_AUTH_NULL

 				  : OSPF_AUTH_CRYPTOGRAPHIC;

+	if(area->auth_type == OSPF_AUTH_CRYPTOGRAPHIC)

+	{

+		if(FIPS_mode())

+		{

+			vty_out(vty, "FIPS mode is enabled, md5 authentication is disabled\n");

+			return CMD_WARNING_CONFIG_FAILED;

+		}

+	}

+

 	return CMD_SUCCESS;

 }

@@ -6665,6 +6679,11 @@ DEFUN (ip_ospf_authentication_args,

 	/* Handle message-digest authentication */

 	if (argv[idx_encryption]->arg[0] == 'm') {

+		if(FIPS_mode())

+		{

+			vty_out(vty, "FIPS mode is enabled, md5 authentication is disabled\n");

+			return CMD_WARNING_CONFIG_FAILED;

+		}

 		SET_IF_PARAM(params, auth_type);

 		params->auth_type = OSPF_AUTH_CRYPTOGRAPHIC;

 		return CMD_SUCCESS;

@@ -6971,6 +6990,11 @@ DEFUN (ip_ospf_message_digest_key,

        "The OSPF password (key)\n"

        "Address of interface\n")

 {

+	if(FIPS_mode())

+	{

+		vty_out(vty, "FIPS mode is enabled, md5 authentication is disabled\n");

+		return CMD_WARNING_CONFIG_FAILED;

+	}

 	VTY_DECLVAR_CONTEXT(interface, ifp);

 	struct crypt_key *ck;

 	uint8_t key_id;

diff --git a/isisd/isis_circuit.c b/isisd/isis_circuit.c

index 81b4b39..cce33d9 100644

--- a/isisd/isis_circuit.c

+++ b/isisd/isis_circuit.c

@@ -1318,6 +1318,10 @@ static int isis_circuit_passwd_set(struct isis_circuit *circuit,

 		return ferr_code_bug(

 			"circuit password too long (max 254 chars)");

+	//When in FIPS mode, the password never gets set in MD5

+	if((passwd_type == ISIS_PASSWD_TYPE_HMAC_MD5) && FIPS_mode())

+		return ferr_cfg_invalid("FIPS mode is enabled, md5 authentication is disabled");

+

 	circuit->passwd.len = len;

 	strlcpy((char *)circuit->passwd.passwd, passwd,

 		sizeof(circuit->passwd.passwd));

diff --git a/isisd/isisd.c b/isisd/isisd.c

index 419127c..a6c36af 100644

--- a/isisd/isisd.c

+++ b/isisd/isisd.c

@@ -1638,6 +1638,10 @@ static int isis_area_passwd_set(struct isis_area *area, int level,

 		if (len > 254)

 			return -1;

+		//When in FIPS mode, the password never get set in MD5

+		if ((passwd_type == ISIS_PASSWD_TYPE_HMAC_MD5) && (FIPS_mode()))

+			return ferr_cfg_invalid("FIPS mode is enabled, md5 authentication is disabled");

+

 		modified.len = len;

 		strlcpy((char *)modified.passwd, passwd,

 			sizeof(modified.passwd));

diff --git a/ripd/rip_cli.c b/ripd/rip_cli.c

index 5bb81ef..02a09ef 100644

--- a/ripd/rip_cli.c

+++ b/ripd/rip_cli.c

@@ -796,6 +796,12 @@ DEFPY (ip_rip_authentication_mode,

 			value = "20";

 	}

+	if(strmatch(mode, "md5") && FIPS_mode())

+	{

+		vty_out(vty, "FIPS mode is enabled, md5 authentication id disabled\n");

+		return CMD_WARNING_CONFIG_FAILED;

+	}

+

 	nb_cli_enqueue_change(vty, "./authentication-scheme/mode", NB_OP_MODIFY,

 			      strmatch(mode, "md5") ? "md5" : "plain-text");

 	if (strmatch(mode, "md5"))