>> > > If that device behaves badly in router mode by blocking just all >> > > icmp traffic instead of only icmp-echo-req, this is a good idea. >> > > You may want to bug AT&T about this problem then. It should really >> > > not block related icmp traffic. >> > >> > >> > Hi Kai, yesterday I switched my Gentoo router over to handling PPPoE >> > and pings seem to be working properly now. The AT&T device is now >> > functioning as a modem only and passing everything through. Today >> > I'll find out if it helps with TCP Queuing and (supposedly) related >> > http response slowdowns. >> >> You may want to set the default congestion control to fq-codel (it's >> in the kernel) if you're using DSL links. This may help your problem a >> little bit. It is most effective if you deploy traffic shaping at the >> same time. There was once something like wondershaper. Trick is to get >> the TCP queuing back inside your router (that is where you deployed >> pppoe) as otherwise packets will queue up in the modem (dsl modems use >> huge queues by default). This works by lowering the uplink bandwith to >> 80-90% of measured maximum upload (the excess bandwidth is for short >> bursts of traffic). Traffic shaping now re-orders the packets. It >> should send ACK and small packets first. This should solve your >> queuing problem. >> >> Between each step check dslreports.com for bufferbloat. I'm guessing >> it is currently way above 1000 ms while it should stay below 20-50 ms >> for dsl. >> >> The fq-codel congestion control fights against buffer bloat. But it >> can only effectively work if you're doing traffic shaping at least on >> your uplink (downlink may or may not be worth the effort depending on >> your use-case). >> >> Additionally, you can lower the priority of icmp-echo-reply this way >> so during icmp flooding your uplink will still work. >> >> This link may help you: >> https://www.bufferbloat.net/projects/codel/wiki/Cake/ > > And this: > https://github.com/tohojo/sqm-scripts
I haven't mentioned it yet, but several times I've seen the website perform fine all day until I browse to it myself and then all of a sudden it's super slow for me and my third-party monitor. WTF??? - Grant
