I done this after you write me on other topic. Doesnt help. When hub 4 its on router mode and netduma is in dmz on hub 4, speeds on netduma also around 350. Im also set static ip for netduma on hub 4. Also doesnt help.
Right now i got netduma behind asus in his dmz, with static ip. Speeds on Asus around 750. All qos on asus off. Netduma still 350.
Yes im using congestion control menu.
On public firmware - option never or something like that. And also disable qos in 3 dots menu.
On beta sliders 100% and im removing all smart qos etc.
Im trying everything. Switched off ipv6 (virgin doesnt support propably), im switched off wifi, im also trying with different dns. For me the best are cloudflare 1.1.1.1 and 1.0.0.1
Maximum what i got from netduma is 350mbps on my 1giga broadband