Not very often recently, but I gather there were a lot of stability problems about a year and a half ago. I was completely away from RIC for a while (sabbaticals are the best thing ever for academics... :-), so I wasn't really watching. If you look back in the forum, though, you can probably find some discussions about crazy-high orphan rates when the network first started getting DDoS'd.
Here's a fork reported in October 2017: https://bitcointalk.org/index.php?topic=446703.msg23395787#msg23395787
Here's a discussion from 2015 about the DDoS attacks -
https://bitcointalk.org/index.php?topic=446703.4080That accusation (Xpoolx accusing Simba (RiePool.ovh) of the DDoS) is one of the ones I was referring to.
And here's a plot of the historical orphan rates (orphans are what happens when there's a race to complete the chain -- a fork is just when the race goes on for a longer time):
https://chainz.cryptoid.info/ric/orphans.dwsYou can see that things got really bad in late 2016 until early 2017. Some time around then is when several people started adding extra DDoS-protected nodes to the network to try to reduce the chaos. The orphan rates calmed down, but there's been a new spike the last few days. (Amusingly, the DDoS is why I started paying attention again, because whomever was doing it launched an attack strong enough it took all of Carnegie Mellon University offline -- I had left a Riecoin node running in my office for the last few years, completely forgotten about it, and then... un-forgot. :-)
There's also some evidence that riepool is responsible for some attacks on uBlock.it. (though no evidence of riepool launching ddos attacks against nodes) when redjedievolution swapped from Riepool, he used the same worker names/passwords that he was using on Riepool and immediately these credentials were being used to launch an attack on the ublock stratum server.
https://bitcointalksearch.org/topic/m.24633879As far as OVH for hosting a Riecoin node, I've had great luck with them so far.
Regarding the network forking, the network appears to be able to better handle these types of attacks now. Last year we were seeing several forks/day for a period.
I will spin up more high capacity ddos protected nodes again to help keep everyone in sync. I would encourage pool operators to add these nodes i'll post them once online and tested.
Nice to see the Riecoin network shrugging off these attacks, they only make her stronger in the long run