qwaz01 wrote: We are having strange issues with our 2860 since upgrading to v3.8.9.2 early last week.

We have dual WAN (EoFFTC VDSL2 and Virgin Media Business) and since upgrading the EoFTTC has been unstable. The connection stays in sync but dropping blocks of 5-10 pings every minute or so and occasionaly going offline for 2-3minutes before coming back. Rebooting the router seems to settle it down for a bit but then the packet loss starts again. I have raised a ticket with our EoFFTC provider but then stumbled across this thread so wonder if its a bigger issue. I called SEG dealer support and was advised to upgrade to v3.8.9.3 to see if that resolves the issue so testing at the moment. Previously this line has been stable for 2 years without any issues at all.

qwaz01 wrote: Same issue with v3.8.9.3 firmware.

I ran a ping overnight and it seemed ok but once more traffic strarted going through the router the EoFTTC (VDSL2) started getting worse and worse. It starts by dropping occasional blocks of 5-10 pings but then gradually gets worse until it can only maintain blocks of 5-10 successful pings. The whole time the connection stays in sync and ARP Detect keeps it green and online.

We have a spare Vigor 2860 so I have downgraded that to v3.8.8, restored our config file and installed that as a test.

geroi wrote:
Do you have Brute Force Protection enabled ?

I've disabled Brute Force Protection on my 2862/3.8.9.2_BT yesterday and since then - all seems OK. Pings on WAN2/EoFTTC are 100%. Even the WebGUI is loading up immediately, without causing havoc with router's performance. So far - so good.