---
title: "Security Groups"
description: "Security Groups set which inbound and outbound traffic your TIR instances, inference services, and Slurm clusters accept."
content_type: "overview"
product: "tir-security-group"
platform: "TIR"
url: "/tir/tir-security-group/"
---

# Security Groups

A security group is a firewall you attach to your TIR resources. Its inbound rules say which traffic can
reach a resource, and its outbound rules say where the resource can send traffic. Attach the same group to
every instance, VM, inference service, or Slurm cluster that needs the same access, and change the rules in
one place.

Every project starts with **Default-SSH-Security-Group**, which lets SSH in from any network and lets all
traffic out. It is enough to start with. Create your own groups when you want SSH from your own address
only, or need to open the port of a web app or an API.

**Security Groups** sits under **Networking** in the side menu, beside two related screens.
[Reserve IP](/tir/tir-reserved-ip/) keeps an IP address for you, and [VPC](/tir/tir-vpc/) gives your VMs a
private network.

## Where to find it

In TIR, open your project. In the side menu, under **PLATFORM SERVICES**, select **Networking**, then
**Security Groups**.

## What you can do

- [Create a security group](/tir/tir-security-group/how-to/create-a-security-group/) with its inbound and
  outbound rules.
- [Attach or detach a security group](/tir/tir-security-group/how-to/attach-or-detach-a-security-group/)
  on an instance, an inference service, or a Slurm cluster. For a VM, see
  [Attach security groups to a VM](/tir/tir-vm/how-to/attach-security-groups-to-a-vm/).
- [Manage security group rules](/tir/tir-security-group/how-to/manage-security-group-rules/) to open or
  close ports as your needs change.
- [Edit a security group](/tir/tir-security-group/how-to/edit-a-security-group/) to change its name or
  description.
- [Delete a security group](/tir/tir-security-group/how-to/delete-a-security-group/) you have finished with.

[Security groups and rules](/tir/tir-security-group/concepts/security-groups/) explains how rules work,
with rule sets for common setups.

## Where to start

[Get started with Security Groups](/tir/tir-security-group/get-started/) creates a group and attaches it to
a resource. The [Security Groups FAQ](/tir/tir-security-group/faq/) has short answers, and
[Troubleshooting Security Groups](/tir/tir-security-group/troubleshooting/tir-security-group/) explains
each message TIR can show.