Article 2: Securing Your Server & IP Reputation Print

Securing Your Linux VPS

Once you log in for the first time, your server is your responsibility. To prevent unauthorized access and protect our network reputation, we recommend the following:

1. Configure the Uncomplicated Firewall (UFW) By default, all ports are open. You should close everything except what you need:

ufw allow 22/tcp    # SSH
ufw allow 80/tcp    # HTTP
ufw allow 443/tcp   # HTTPS
ufw enable

2. Install Fail2Ban Fail2Ban monitors your logs for "Brute Force" attempts and automatically bans the attacker's IP.

apt install fail2ban -y

IP Reputation & Blacklists

At SVR4U, we provide "Clean" IPv4 addresses. To keep them clean:

• No Bulk Mail: Do not use our servers for unsolicited marketing emails.

• Monitor for Compromise: If your server is hacked, it may be used to launch DDoS attacks. Regularly check your running processes with top or htop.

• Blacklist Fee: Please note that according to our AUP, a RM 50.00 fee is applied to any account that causes an IP to be blacklisted by major providers (Gmail, Microsoft, Spamhaus).