I have the share ip at lets say 10.0.0.1 and a secondary ip 10.0.03.

Server ip is 10.0.0.2

Shared ip is also 10.0.0.1

All sites use server ip

Why do i have over 1GB transfer every hour on the secondary ip?

From Deepseek.com, and I agree:

The secondary IP address (10.0.0.3) showing over 1GB of transfer every hour, while all sites are configured to use the server IP (10.0.0.2), suggests that there is traffic being routed or directed to the secondary IP. Here are some possible reasons for this:

---

1. Misconfigured Services or Applications

• A service or application on the server might be explicitly bound to the secondary IP (10.0.0.3) instead of the primary IP (10.0.0.2). This could include:

  • Web servers (e.g., Apache, Nginx)

  • Database servers (e.g., MySQL, PostgreSQL)

  • Backup services

  • Monitoring or logging tools

• Check the configuration files of these services to ensure they are not listening on the secondary IP.

---

2. DNS or A Records Pointing to the Secondary IP

• If any DNS records (A records) point to the secondary IP (10.0.0.3), traffic will be directed to that IP. For example:

  • A subdomain or specific service might be configured to use 10.0.0.3.

  • A misconfigured DNS record could accidentally route traffic to the secondary IP.

• Verify your DNS settings to ensure no domains or subdomains are pointing to 10.0.0.3.

---

3. Network Interface Configuration

• The network interface on the server might be misconfigured, causing traffic to be routed through the secondary IP. For example:

  • Incorrect routing tables.

  • Improper binding of IP addresses to the network interface.

• Check the server's network configuration (e.g., /etc/network/interfaces on Linux) and routing tables (ip route or route -n).

---

4. Background Processes or Cron Jobs

• A background process or cron job might be using the secondary IP for tasks such as:

  • Data synchronization.

  • Backups.

  • API calls or external communication.

• Check running processes (ps aux, top, or htop) and cron jobs (crontab -l) to identify any tasks that might be generating traffic.

---

5. Malware or Unauthorized Access

• The secondary IP might be compromised, and an attacker could be using it for malicious activities such as:

  • Data exfiltration.

  • Serving malicious content.

  • Participating in a botnet.

• Investigate the traffic using tools like tcpdump, iftop, or nethogs to identify the source and destination of the traffic.

---

6. Load Balancing or Proxy Configuration

• If the server is behind a load balancer or proxy, the secondary IP might be used for specific traffic. For example:

  • The load balancer might be directing certain requests to 10.0.0.3.

  • A reverse proxy might be forwarding traffic to the secondary IP.

• Check the configuration of any load balancers or proxies in your setup.

---

7. Logs and Monitoring

• Analyze server logs to identify the source of the traffic:

  • Web server logs (e.g., Apache, Nginx).

  • Firewall logs (e.g., iptables, ufw).

  • System logs (/var/log/syslog, /var/log/messages).

• Use monitoring tools like iftop, nethogs, or vnstat to track real-time traffic on the secondary IP.

---

Steps to Diagnose and Resolve:

1. Check Network Configuration:

   • Verify the IP addresses assigned to the network interface.

   • Ensure no services are bound to the secondary IP.

2. Analyze Traffic:

   • Use tools like tcpdump or iftop to capture and analyze traffic on the secondary IP.

3. Review DNS Settings:

   • Ensure no DNS records point to the secondary IP.

4. Inspect Running Processes:

   • Identify any processes generating traffic on the secondary IP.

5. Check for Malware:

   • Run a malware scan and investigate suspicious activity.

6. Review Logs:

   • Examine server logs for unusual activity or errors.

By systematically checking these areas, you should be able to identify the source of the traffic and resolve the issue.

ip route

default via 46.xx.xx.1 dev enp4s0 proto static metric 100

46.xx.xx.0/26 dev enp4s0 proto kernel scope link src 46.xx.xx.16 metric 100

46.xx.xx.44 is my main ip.

Also both uses the same interface when running vnstat

ns1.domain.com -> 46.xx.xx.44
ns2.domain.com -> 46.xx.xx.16

In february i used 11gb bandwith on the secondary. So far in march i have used 97gb

Edited March 14Mar 14 by leisegang