I have found this absolutely awesome project, that seems semi abandoned, at least it does not have many of the modern coins you would get into of you would go into the masternode game now. But it for sure does things WAY better then 99% of the stupid noob masternode guides arround that just run one coin as root without systemd, without bothering to move the bins and things like this. I have seen so many horrible guides. And finally I have a good source for dependencies and compile switches for coins.
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Did you get anywhere with the ipv6 issues, I am having a few myself trying to use this script.