How to register a large number of IP addresses with Debian/Ubuntu

Why do you need multiple IP addresses?

Multiple IP addresses are often needed for various reasons, particularly when it comes to network services and risk control. During the registration process of many online services, IP addresses are tracked and monitored to ensure certain risk control conditions are met.

One of the most basic reasons for requiring multiple IP addresses is to prevent the same IP from registering multiple accounts within a specific time frame. This measure helps to maintain fairness and security within the system, preventing users from creating multiple accounts to gain an unfair advantage or engage in fraudulent activities.

Having multiple IP addresses allows businesses to navigate through potential restrictions and limitations imposed by service providers. It provides them with the flexibility to register multiple accounts and meet their business requirements without violating any rules or risking penalties.

Overall, the need for multiple IP addresses arises from the requirement to maintain fairness, security, and flexibility within network services. By having access to multiple IP addresses, businesses can overcome restrictions, meet their multi-account needs, and enhance their security and privacy.

The main advantage of owning an IP address

IP address blocks can be obtained in two ways: by renting from the provider or purchasing them from the provider and registering them to Your company name.

First, IP addresses would belong to the service provider, meaning your company would be exposed to all the risks and actions related to the provider.

A company can lose rented IP addresses if the provider's hardware fails or licensing issues arise. Provider exchanges can also complicate IP address switching.

Your main advantage is the independence from one provider as an IP address owner.

What if you need Your own autonomous system and IP block?

The answer is rather simple: if a company has created a wide IT infrastructure, individual IP addresses are required. Including:

For example, email servers, IP telephones, and other hardware communication providers use IP addresses for their own infrastructure and grant them to their clients.

Infrastructure providers who assign IP addresses to client servers, virtual servers, and SSL-secured home pages;

Companies with wide branch networks that divide IP addresses among branches. In order to establish direct connections, organise email servers, and for other reasons, this is necessary.

Step-by-Step Guide 

# cat /etc/network/if-up.d/eth0

# nano /etc/network/if-up.d/eth0
#!/bin/sh
if [ "$IFACE" = "eth0" ]; then
for IP in {0..63}; do
ip addr add 10.1.1.${IP}/24 dev eth0
done
for IP in {128..191}; do
ip addr add 10.2.2.${IP}/24 dev eth0
done
for IP in {128..191}; do
ip addr add 10.3.3.${IP}/24 dev eth0
done
for IP in {128..191}; do
ip addr add 10.4.4.${IP}/24 dev eth0
done
fi

#chmod +x

You can test the script using the command:

#IFACE=eth0 /etc/network/if-up.d/eth0