# Allowed Address Pairs

> In CubeCOS, Allowed Address Pairs is a network security feature provided by Neutron that allows a virtual machine’s (VM’s) network interface (port) to be configured with additional IP addresses. This enables users to configure multiple IP aliases within the guest operating system, while ensuring that Neutron allows traffic to and from those additional addresses.

In CubeCOS, Allowed Address Pairs is a network security feature provided by Neutron that allows a virtual machine’s (VM’s) network interface (port) to be configured with additional IP addresses. This enables users to configure multiple IP aliases within the guest operating system, while ensuring that Neutron allows traffic to and from those additional addresses.

## Edit network port to allocate Allowed Address Pairs {#edit-network-port-to-allocate-allowed-address-pairs}

1. Navigate to `Project > Network > Ports`, then click desired port.

   ![/assets/network/address_pairs_1.png](/assets/network/address_pairs_1.png)

2. Click `Allowed Address Pairs` on the banner, then click `+ Create Allowed Address Pairs`

   ![/assets/network/address_pairs_2.png](/assets/network/address_pairs_2.png)

3. Select `IP Version` then assign `CIDR` and `MAC`. Click `OK` to proceed.

   ![/assets/network/address_pairs_3.png](/assets/network/address_pairs_3.png)

4. Verify Allowed Address Pairs creation.

   ![/assets/network/address_pairs_4.png](/assets/network/address_pairs_4.png)