PPPoE connection on XGS 2100 SFOS 19.0.0 GA-Build31 - slow page loading

Hi Carlo 

Can you check if the status for DNS is resolving properly from GUI with Test lookup ?

Please go Configure -->Network -->DNS-->DNS Configuration, click on Test  Name lookup and add sophos.com click the Test connection?

Have you checked the issue with mss as per the below command from CLI?

console> set network mtu-mss Port2 mtu 1492 mss 1412

Thanks 

After I execute that command I cannot browse internet any more. Need to return to old settings 1492/1444

does this mean something? 

Hi Carlo 

Please check the status for the below commands 

system appliance_access show 

system firewall-acceleration show

Thanks 

console> system appliance_access show
Appliance access disabled.
console> system firewall-acceleration show
Firewall Acceleration is Enabled in Configuration.
Firewall Acceleration is Loaded.

Hi Carlo 

can you disable firewall acceleration and check website loads ?

Thanks

Since when you identified the issue, any change done on upstream router and caused the issue?

May be live session is required to generate proper  logs and investigate the issue along with packet flow from Sophos firewall 

Have you raised support case ?

Thanks

Hi Carlo 

Please check if there is no issue with mss too as tcpdump you shared not having enough information 

console> set network mtu-mss Port2 mtu default  mss 1380 

Please revert the old settings if no change is found 

Aslo, check the interface negotiation 100FD or 100HD ,you may also check if there is any negotiation issue between WAN or LAN with the next-in-line device.

Open Console go to Option 4 and type ethe command

console > system dia uti band       "press 'u' twice"

Check if there is any error's E/S  (error/second)

If so then lower the link speed.

Also, another step provide us the output of the command;

Console> sh net interfaces

Thanks 

Hi Carlo 

Please check SSL/TLS Inspection logs as well and share the output 

Thanks