> As for the relay, I am pretty sure there is a firewall or something
> which throttles the incoming / outgoing TCP connection a
> process/user/pid can initiate or something like this. The problem is
> either in the operating system itself either a network-level firewall or
> built-in router firewall.
Could be. It's just simple iptables on the node, and I've tried to follow best practices for the sysctl and ulimit tweaks, but I don't really know what's going on upstream with the provider. It's a little odd that this is only a recent problem, as the node has been up for 700+ days and aside from kernel upgrades, there's no recent changes. Maybe it's just busier than usual now. I'll keep digging. Thanks for the feedback!