# Gyro Cloud Istanbul: additional IPv4 addresses

https://www.gyrohosting.com/en/knowledgebase/article/gyro-cloud-istanbul-additional-ipv4

- **What you will learn**: How to add and release additional IPv4 addresses, their price and limits, how they are configured on the server and how to set reverse DNS.
- **Time**: 6 minutes

## 1. What is an additional IPv4 address?

Extra IPv4 addresses that **point to the same server** as its primary address. Use them to publish services on separate addresses (e.g. web and mail), to give a customer a dedicated address or to send traffic from a different source address.

- **Limit:** up to **5** additional addresses per server (open a ticket if you need more).
- **Price:** **2 EUR** per address per month (the TRY amount is shown in the panel), metered **hourly** from your prepaid balance, from the hour you add it until the hour you release it; the monthly cap is never exceeded.
- **Configured automatically:** the address is added to your server within seconds (as `/32` on the primary interface) and kept across reboots, reinstalls and snapshot restores; no network configuration is needed.
- Additional addresses are covered by your server's **network firewall / security groups** automatically.

> **Info**
> 
> Additional addresses are IPv4 only and are sold on Gyro Cloud Istanbul (hourly, prepaid) servers.

## 2. Adding and releasing addresses in the panel

1. Open **Management** > **Network & Security** > **Additional IPv4 addresses** of your server.
2. Pick the **Quantity** (up to your remaining allowance) and press **Add IP**. The confirmation shows the extra monthly total.
3. The new addresses appear in the list marked **Additional**; within seconds the page says "The addresses are active on the server."
4. To release an address press **Release** in its row and confirm. The address is removed from the server and returns to the pool; billing stops after that hour.

> **Warning**
> 
> Getting a released address back **is not guaranteed**; it may be given to another server. Update DNS records, SSL and mail settings that use it first.

> **Info**
> 
> You can add or release addresses while the server is off; they are configured when it starts. A suspended server cannot get new addresses.

## 3. How the address looks on the server

Additional addresses are added to the primary network interface:

```
ip -4 addr show
# inet 203.0.113.10/24 ... ens192        <- primary
# inet 203.0.113.20/32 ... ens192        <- additional
```

To bind a service to a specific address set the application's listen/bind address to that IP. To use an additional address as the source of outgoing connections, set the source address in the application (e.g. `curl --interface 203.0.113.20 https://example.com`).

Rarely (an old guest agent on the server, or a network setup you changed completely) the panel says "The server could not configure the addresses automatically" and shows **ready-made commands**. Run them as root and press **Apply again**.

## 4. Reverse DNS (rDNS)

Additional addresses appear in **Network & Security** > **Reverse DNS** together with the primary address. You can request a separate PTR record for each (e.g. `mail.example.com` for the address that sends mail); it goes live after review. Details: [snapshots, templates and reverse DNS](https://www.gyrohosting.com/en/knowledgebase/article/gyro-cloud-istanbul-rdns-snapshots).

## 5. CLI, API and Terraform

```
gyro server ip list 12345
gyro server ip add 12345 --count 2
gyro server ip remove 12345 203.0.113.20 --yes
```

API (Gyro Public API 2.16.0):

```
curl -H "Authorization: Bearer $GYRO_TOKEN" https://www.gyrohosting.com/api/v1/client/cloud/servers/12345/ips
curl -X POST -H "Authorization: Bearer $GYRO_TOKEN" -H "Content-Type: application/json" \
     -d '{"count":1}' https://www.gyrohosting.com/api/v1/client/cloud/servers/12345/ips
curl -X DELETE -H "Authorization: Bearer $GYRO_TOKEN" \
     "https://www.gyrohosting.com/api/v1/client/cloud/servers/12345/ips/203.0.113.20?confirm=true"
```

Terraform (provider `gyro-hosting/gyro` 0.14.0 or later):

```
resource "gyro_server_ip" "extra" {
  count     = 2
  server_id = gyro_server.web.id
}

output "extra_ips" {
  value = gyro_server_ip.extra[*].ip
}
```

## 6. Frequently asked questions

**How much does an additional IP cost?**

2 EUR per address per month (TRY amount in the panel). It is metered hourly, so keeping an address for a few hours costs only those hours. Each address is a separate line ("Additional IPv4 (address)") on the Usage page.

**What happens to the addresses when I delete the server?**

They are released with the server and their billing stops.

**Can I get more than 5 addresses?**

Open a support ticket; we can set a higher limit for your account.

**Can I move an additional address to another server?**

No. An address stays with the server it was added to; add a new one to the other server.

**Do my firewall rules cover the additional addresses?**

Yes. The network firewall and security groups apply to every address of the server.

## Next step

- [Firewall and security groups](https://www.gyrohosting.com/en/knowledgebase/article/gyro-cloud-istanbul-firewall)
- [How the hourly price is calculated](https://www.gyrohosting.com/en/knowledgebase/article/how-the-hourly-price-is-calculated)