A security group is a collection of firewall rules. By grouping these rules in a security group you can easily assign these groups to one or more virtual servers.
Which rules should I add?
Which rules to add to a security group differs per user case. There are a few rules that are needed for most virtual servers. We advise you to create a security group for these rules, so you can easily assign these rules to all of your virtual servers.
Some rules that are needed for most virtual machines are:
- Port 22, for SSH
- Port 53, for DNS
the article Managing security groups linked to https://mijndomeinvps.zendesk.com/hc/en-us/articles/115005545265 doesn't exist yet :-(
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