Mohammad Arsalan Rather

Aspiring Backend Developer | Passionate about learning and exploring AI/ML & IoT | Always learning & growing

[Mohammad Arsalan Rather @arsalan_org]

@KolusuTrinadh @Anaya_sharma876 Thanks

[Mohammad Arsalan Rather @arsalan_org]

@KolusuTrinadh @Anaya_sharma876 Resources [free] 🙂

[Mohammad Arsalan Rather @arsalan_org]

@KolusuTrinadh @Anaya_sharma876 I already know basics java including oops etc

[Mohammad Arsalan Rather @arsalan_org]

@KolusuTrinadh @Anaya_sharma876 I already know backend concepts, i want to switch from nodejs to java

[Mohammad Arsalan Rather @arsalan_org]

@KolusuTrinadh @Anaya_sharma876 Resoucres?

[Jesse Rowe @jessetrowe]

We're at war with AI slop.

More than half the internet is AI generated and nobody can tell you which half.

Introducing @DetectArena, the place you go to check if something is AI, and then verify that claim.

comment "spot slop" for 25 extra credits 👇

[Mohammad Arsalan Rather @arsalan_org]

@muneeb_inayat Wrong number 🌚🌚

[Mohammad Arsalan Rather @arsalan_org]

Haven’t been coding lately, so I focused on how systems run behind the scenes. Converted an old laptop into a local server: Ubuntu, static IP, SSH, Nginx, (PM2), psql.
Static IP setup helped me understand how university/ office networks work.

#Backend #DevOps #Linux

[Mohammad Arsalan Rather @arsalan_org]

@ohhyesweirdo Dm

[Mohammad Arsalan Rather @arsalan_org]

3. Used Netplan/nmcli to set:
IP → 192.168.29.100
Gateway → router IP
DNS → 8.8.8.8 / 8.8.4.4

4. Applied changes and restarted network services.

5. Verified using "ip a" that the IP is no longer dynamic.

Now the server has a stable identity on the local network.

[Mohammad Arsalan Rather @arsalan_org]

How I assigned a fixed (static) IP:
1. Identified my network interface and current IP using "ip a" and gateway using "ip route".
2. Disabled DHCP and configured a static IP within my router’s subnet.

[Mohammad Arsalan Rather @arsalan_org]

Result: services are accessible only to devices connected to my WiFi just like university/office intranet systems.

[Mohammad Arsalan Rather @arsalan_org]

5. Ran backend services (Node.js with PM2) and connected PostgreSQL.
6. Configured Nginx as a reverse proxy to route traffic internally.
7. Did NOT expose any ports to the internet (no port forwarding).

[Mohammad Arsalan Rather @arsalan_org]

This effectively creates a “closed network” environment similar to campus or office systems where internal portals work only when you're connected to the organization’s network.

[Mohammad Arsalan Rather @arsalan_org]

This is how many university/office systems work: services hosted on private IPs, accessible only within the organization’s network.

[Mohammad Arsalan Rather @arsalan_org]

No public exposure traffic doesn’t go over the internet. Everything stays inside the network, which makes it faster and more controlled.

[Mohammad Arsalan Rather @arsalan_org]

@adahstwt Aws is down