@OliverN I understand now. Yes the NAT-only nature of the TPlink gateways will mess you up! Some crazy ideas to get your creativity going: Now the 7206 does have up to 5 WAN ports, and you can force...

@OliverN What is the advantage of having the Sophos be the DHCP server? Can you not just apply rules based on source address etc.? Alternatively, what's the advantage of having both the 7206 and...

@friendofdog Is it possible the ISP is changing your Wan IP every hour? What is the lease time given? To find this out, you may need to connect your laptop direct to ISP device and use the Windows...

@MR.S et al I reported a similar bug with ER707 v1.2.3 running IPSEC over L2TP to some ER605v1. Tunnels don't even come up anymore, but downgrading to 1.2.2 again fixes everything. These were...

@PAUL532 Correct. Once the CPU starts to pin, memory starvation is in progress. I would downgrade both to 5.1.1 and await 5.1.7 If misery loves company....here's my saga:...

@PAUL532 Firmware is still showing as 5.1.6 in your screen grab. Our recommendations were to downgrade, and TPlink suggested 5.1.1