My Answer is failing even after successfully solving the Day 12: Linux Network Services(100 Days of DevOps)

RohitKumar · February 24, 2026, 6:29pm

While working on Day 12: Linux Network Services (100 Days of DevOps), I followed all the steps correctly. However, the task is still failing even though everything appears to be working fine on my end.

Could you please review the attached screenshot and let me know what might be causing the issue?

MIQDAD · February 25, 2026, 4:47am

github.com

MiqdadProjects/kodekloud-eng-100-days-devops/blob/main/DAY12/task-12-fix-apache-port-3002-connectivity.md

**🌟 Task 12 - Troubleshoot and Fix Apache Service Connectivity on Port 3002**

**📌 Task Description**

The monitoring tool reported that **Apache service** on **App Server 1** in **Stratos Datacenter** is not reachable on **port 3002**. Possible issues include the service being down, firewall blocking, or other network issues.

👉 **Your task:** Use network troubleshooting tools such as `telnet`, `netstat`, `iptables`, etc., to identify and fix the problem. Confirm Apache is reachable from the jump host without compromising security.

💡 **Note:** You can find the infrastructure details by clicking on the **Details of all Users and Servers** button on the top-right section of the page.

---

## 🔹 Step 1: Test connectivity from Jump Host

**From Jump Host:**

```bash
telnet stapp01 3002
```

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Denis_S · April 13, 2026, 8:17pm

Yes you have to set Iptables to allow traffic on that specific port

naveen · August 13, 2026, 11:40am

For this question first check
telnet stapp01 port
telnet stapp02 port
telnet stapp03 port

after this on one server u wont able to telnet to one server there u need to login to that app server and check
systemctl status httpd if it is giving issue like address already in use
kill that mail process and restart the httpd
still if u are unable to do telnet from jump server then check the iptables instead of firewall on app server .
add the iptable entry and save it then try telnet from jump server and also check “curl http://appserver:port” then it will work