This shows the inbound traffic rules that are associated with this security group, which contains five fields of information:
Let's take a closer look:
- Type: This represents the type of protocol that you would like to open up to network traffic (for example, SSH).
- Protocol: This shows the protocol associated with the type.
- Port Range: This shows the port range of the protocol. If using a customer Type and Protocol, you can manually enter a custom port range.
- Source: Much like the Source entry with your route tables/NACL, this can be a network subnet CIDR range, a single IP address using a /32 mask, or exposed to traffic from anywhere (using 0.0.0.0/0).
- Description: An optional field allowing you to describe what this rule is used for.
Notice that there is not a field for Allow or Deny as we have with NACLs. This is because security groups only provide Allow rules by default, therefore, if a rule is in a security...