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    Multi-wan Azure Dyndns updates not working when primary WAN is unplugged

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    Routing and Multi WAN
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    • N
      npatel4
      last edited by

      Hi,

      I have 2 wan connections in a Gateway group. They are set up as failover and I'm using Azure DynDNS to update an A record. When I manually set a Gateway as down, in this case, WAN 1, the DynDNS updates automatically to reflect the IP of WAN 2 but the same doesn't work when I manually unplug WAN 1 from the pfSense router.

      The Setup

      WAN

      • WAN 1 (Direct IP- Gigabit Ethernet service - Directly terminated from Fibre box) - Tier 1

      • WAN 2 (PPPoe - Directly connected from NTU) - Tier 2

      • Both WAN connections are a part of a Gateway group called PreferFiber

      DNS

      • 2 Internal Windows DNS servers

      • 8.8.8.8 - Gateway set as WAN 1

      • 8.8.4.4 - Gateway set as WAN 2

      Rules

      • The default LAN rule has been changed to use the PreferFiber gateway group as its gateway.

      DynDNS

      • Using Azure DNS to update an A record within our DNS Zone. - Tested ok and is working under WAN 1.

      Problem

      • The above setup is working normally (through WAN 1) and if I mark WAN 1 as down, the gateway group successfully fails over and the DynDNS update is triggered but if I unplug the WAN 1 cable from the router, my failover kicks in but the DynDNS fails to update.

      I have been hitting my head against this problem but no amount of packet captures or logs can help me narrow down the problem.

      Please see attached log of both scenarios.

      
---------------- WAN 1 Gateway marked as down (working ok!) -------------------

May 23 23:59:45 	May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: phpDynDNS : (Success) IP Address Changed Successfully!
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: phpDynDNS: updating cache file /conf/dyndns_PreferFiberazure'<A Record>'0.cache: <WAN 2 IP>
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Dynamic DNS azure : <WAN 2 IP> extracted from local system.
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Dynamic DNS azure : _checkStatus() starting.
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Data: {"id":"<Successful payload from Azure>"type":"Microsoft.Network\/dnszones\/A","etag":"","properties":{"fqdn":"<DNS A RECORD>","TTL":60,"ARecords":[{"ipv4Address":"<WAN 2 IP>"}]}}
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header:
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header:
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: date: Mon, 24 May 2021 00:04:26 GMT
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: x-ms-routing-request-id: AUSTRALIAEAST:20210524T000427Z:<requestId>
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: x-ms-correlation-request-id: requestId
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: x-powered-by: ASP.NET
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: server: Microsoft-IIS/10.0
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: x-ms-ratelimit-remaining-subscription-resource-requests: 11999
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: x-ms-request-id: <request ID>
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: strict-transport-security: max-age=31536000; includeSubDomains
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: x-content-type-options: nosniff
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: etag: <etag>
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: content-type: application/json; charset=utf-8
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: content-length: 368
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: cache-control: private
May 24 00:04:27 	php-fpm 	343 	/rc.dyndns.update: Response Header: HTTP/2 200
May 24 00:04:23 	php-fpm 	343 	/rc.dyndns.update: Dynamic DNS azure : _update() starting.
May 24 00:04:23 	php-fpm 	343 	/rc.dyndns.update: DynDns : Dynamic Dns: cacheIP != wan_ip. Updating. Cached IP: <WAN 1 IP> WAN IP: <WAN 2 IP>
May 24 00:04:23 	php-fpm 	343 	/rc.dyndns.update: Dynamic Dns : Current WAN IP: <WAN 2 IP> Cached IP: <WAN 1 IP>
May 24 00:04:23 	php-fpm 	343 	/rc.dyndns.update: Dynamic DNS azure : <WAN 2 IP> extracted from local system.
May 24 00:04:23 	php-fpm 	343 	/rc.dyndns.update: Dynamic DNS : running get_failover_interface for wan. found igb0
May 24 00:04:23 	php-fpm 	343 	/rc.dyndns.update: Dynamic DNS azure : <WAN 2 IP> extracted from local system.
May 24 00:04:23 	php-fpm 	343 	/rc.dyndns.update: Dynamic DNS: updatedns() starting
May 24 00:04:22 	check_reload_status 	381 	Updating all dyndns
May 24 00:04:22 	check_reload_status 	381 	Reloading filter
May 24 00:04:21 	php-fpm 	342 	/system_gateways.php: Gateway, none 'available' for inet6, use the first one configured. ''
May 24 00:04:21 	php-fpm 	342 	/system_gateways.php: Default gateway setting Interface WAN 2 Gateway as default.
May 24 00:04:21 	php-fpm 	342 	/system_gateways.php: Gateway, switch to:WAN 2
May 24 00:04:21 	php-fpm 	342 	<WAN 1 GW>|<WAN 1 IP>|WANGW|7.904ms|3.494ms|0.0%|down|force_down
May 24 00:04:21 	php-fpm 	342 	/system_gateways.php: MONITOR: WAN 1 GW is down, omitting from routing group PreferFiber 

---------------- WAN 1 cable manually unplugged (not working!) --------------------------

May 24 00:13:41 	php-fpm 	19319 	/rc.dyndns.update: Tenant ID not found
May 24 00:12:26 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS azure : _update() starting.
May 24 00:12:26 	php-fpm 	19319 	/rc.dyndns.update: DynDns : Dynamic Dns: cacheIP != wan_ip. Updating. Cached IP: <WAN 1 IP> WAN IP: <WAN 2 IP>
May 24 00:12:26 	php-fpm 	19319 	/rc.dyndns.update: Dynamic Dns : Current WAN IP: 1<WAN 2 IP> Cached IP: <WAN 1 IP>
May 24 00:12:26 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS azure : <WAN 2 IP> extracted from local system.
May 24 00:12:26 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS : running get_failover_interface for wan. found igb0
May 24 00:12:26 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS azure : <WAN 2 IP> extracted from local system.
May 24 00:12:25 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS: updatedns() starting
May 24 00:12:24 	php-fpm 	19319 	/rc.dyndns.update: Tenant ID not found
May 24 00:11:09 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS azure : _update() starting.
May 24 00:11:09 	php-fpm 	19319 	/rc.dyndns.update: DynDns : Dynamic Dns: cacheIP != wan_ip. Updating. Cached IP: <WAN 1 IP> WAN IP: <WAN 2 IP>
May 24 00:11:09 	php-fpm 	19319 	/rc.dyndns.update: Dynamic Dns : Current WAN IP: <WAN 2 IP> Cached IP: <WAN 1 IP>
May 24 00:11:09 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS azure : <WAN 2 IP> extracted from local system.
May 24 00:11:09 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS : running get_failover_interface for wan. found igb0
May 24 00:11:09 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS azure : <WAN 2 IP> extracted from local system.
May 24 00:11:09 	php-fpm 	19319 	/rc.dyndns.update: Dynamic DNS: updatedns() starting
May 24 00:11:09 	php-fpm 	97379 	/rc.openvpn: Gateway, none 'available' for inet6, use the first one configured. ''
May 24 00:11:09 	php-fpm 	343 	/rc.filter_configure_sync: Gateway, switch to: WAN 2
May 24 00:11:09 	php-fpm 	19319 	/rc.dyndns.update: Gateway, switch to: WAN 2
May 24 00:11:09 	php-fpm 	97379 	/rc.openvpn: Default gateway setting Interface WAN 2 Gateway as default.
May 24 00:11:09 	php-fpm 	97379 	/rc.openvpn: Gateway, switch to: WAN 2
May 24 00:11:09 	php-fpm 	97379 	<WAN 1 GW>|<WAN 1 IP>|WANGW|7.405ms|3.321ms|23%|down|highloss
May 24 00:11:09 	php-fpm 	97379 	/rc.openvpn: MONITOR: WANGW has packet loss, omitting from routing group PreferFiber
May 24 00:11:08 	check_reload_status 	381 	Reloading filter
May 24 00:11:08 	check_reload_status 	381 	Restarting OpenVPN tunnels/interfaces
May 24 00:11:08 	check_reload_status 	381 	Restarting ipsec tunnels
May 24 00:11:08 	check_reload_status 	381 	updating dyndns WANGW
May 24 10:11:08 	rc.gateway_alarm 	3046 	>>> Gateway alarm: WANGW (Addr:<WAN 1 GW> Alarm:1 RTT:7.385ms RTTsd:3.287ms Loss:21%)
May 24 00:10:53 	check_reload_status 	381 	Reloading filter
May 24 00:10:53 	php-fpm 	343 	/rc.linkup: Hotplug event detected for WAN 1 (wan) static IP (<WAN 1 IP> )
May 24 10:10:52 	kernel 		igb0: link state changed to DOWN
May 24 00:10:52 	check_reload_status 	381 	Linkup starting igb0
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      • N
        npatel4
        last edited by

        I seem to have resolved this issue by reinstalling an older version of pfSense v2.4.5. With that in mind, I believe this to be a bug with v2.5.1.

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