RV340 random websites not loading

[MarkWalsh7669]

Hi

Got a really strange issue with an RV340.  Setup was originally with a 4G mobile router from the LAN port to WAN1 and an ADSL line/modem on WAN2.  There’s 4 VLANS setup and everything works normally and as expected with inter vlan routing, WAN failover and the firewall setup etc.

The 4G connection has been replaced with a 300Mbps fibre line - WAN1 config updated to connect to the new isp.  Everything works as expected but you can’t connect to random website that are no way connected and only have issues from Windows 10 machines - main site you can’t connect to is www.bbc.co.uk. Via the WiFi on a tablet and mobile, you can connect to these websites.  Now if the cable is pulled for the fibre line the RV340 uses WAN2 and all devices connect to all sites either via WiFi or copper.  Reconnect the fibre line and the windows 10 devices can’t connect.  If we use the ISP’s router, all of the devices can connect to all the sites with no issues through this.  If I connect the ISP’s router from the lan port to WAN1 on the RV340 then all the sites work.

I’ve tried different versions of the firmware for the RV340, adjusted the MTU, crashed the RV340 down to factory default and just bough up WAN1 on the fibre line and it’s still the same.  I can ping and tracert the websites that are not loading from all devices but they just timeout and will not load on Windows 10 machines.  It’s not a firewall/av issue as these have all been disabled and it works with the same setup (WiFi, VLANS and rv340) when wan1 is disconnected or using the ISP’s router in WAN1.  

There is a log entry for the firewall that gets created as soon as the browser times out that the firewall has dropped packets from the client machine but the IP address it is sending these to are not connected to the website were trying to load.

[balaji.bandi]

How about if you leave WAN1 new connection is this still work alone?

here is LB config between WAN, can you post the configuration to have look.

https://www.cisco.com/c/en/us/support/docs/smb/routers/cisco-rv-series-small-business-routers/KMGMT-1568_WAN_Load_balancing_on_RV340_Router.html

[MarkWalsh7669]

Tried it with just WAN1 connected and it’s exactly the same - also swapped the config over for WAN 1 & 2 and still the same

Load balancing is not setup to split the load - it’s setup to roll over to WAN2 if WAN1 goes down.  Precedence is WAN1 = 1 and WAN2 = 2

[jesse7Tzz]

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