So I rent a dedicated server from OVH, use it for some game servers and website hosting, have had it for a year now (had a different host prior for about 4 years, but OVH had a better deal for me last year). I also have a set of IP's from OVH that I use and aliased to my server for different servers I run and sites, all of which have worked fine for almost a year now.
But while I was at work today, my wife called and said everything went offline and had no connection/ping. Sure enough, after I got home, our main server IP works fine and we have connection, but all my IP's that were aliased no longer are pingable. I checked all my eth0:X files, all are still setup as they should be and were before, neither of us made any changes or anything since it was originally setup, but it suddenly won't work now? I tried rebooting our machine, disabling the firewall, among a few other small things, but I am stumped at the moment.
Anyone have any ideas or things I can try? I am running CentOS 6.8 currently, and can provide any other needed info. Thanks!