A security group is a set of inbound and outbound rules based on protocols, allowing data transmission within the network. Depending on the protocol used, you can easily enable a single IP address, a group of IP addresses, or another security group.
Available protocols for creating inbound/outbound rules:
| UDP |
The User Datagram Protocol is recommended when speed and timing are prioritized over reliability (it doesn't provide error correction or retransmission mechanisms).
It is often used for real-time applications (VoIP, video and audio streaming, broadcast and multicast applications) and non-critical data.
It is used in protocols such as DNS (Domain Name System) for resolving domain names and DHCP (Dynamic Host Configuration Protocol) for dynamically assigning IP addresses. |
| ICMP |
The ICMP (Internet Control Message Protocol) is used mainly for error reporting and handling network issues.
It provides essential information to ensure connectivity, diagnose problems and optimise network performance.
It does not use ports but specific message types and codes. |
| TCP |
The TCP (Transmission Control Protocol) is connection-oriented and establishes a connection before data transfer. It uses flow and error control to ensure accurate and ordered data delivery.
TCP supports bidirectional data flow, allowing simultaneous sending and receiving. |
The security group service is provided at no extra cost.