Setting up a home network – the complete guide

In a modern home, a fast and reliable network is essential for working from home, streaming, gaming, smart devices and everyday communication. Setting up a good home network can look complicated, but with the right guide it is straightforward. This article covers everything you need to set up your home network properly.

The equipment you need

Before you start, get the following equipment:

1. A router (Wi-Fi router)

The router is the heart of your home network. Choose one based on the size of your home, the number of devices and your internet speed:

• For flats up to 80 m²: A good dual-band Wi-Fi 6 router
• For houses and larger spaces: A mesh system (e.g. TP-Link Deco, ASUS ZenWiFi)
• For gaming and streaming: A Wi-Fi 6E or Wi-Fi 7 router

2. A modem (if your provider does not supply one)

Most internet providers in Croatia (HT, A1, Telemach) include a modem in the package. If yours does not, check that the modem supports your connection type (ADSL, VDSL, cable, fibre).

3. Network cables (Ethernet)

For a stable connection to a desktop computer, game console or smart TV, use Cat6 or better Ethernet cables.

4. A mesh system or range extender (optional)

In large spaces or houses with several floors, where Wi-Fi does not reach everywhere, a mesh system or range extender gets rid of “dead zones”.

5. Powerline adapters (optional)

They carry your internet connection over the electrical wiring – useful when you cannot run cables.

Setting up your home network step by step

Step 1: position the router

Where you put the router makes a big difference to your Wi-Fi signal:

• Central location: Put the router in the middle of your flat or house
• Height: Place it on a shelf or wall, not on the floor
• Avoid obstacles: Keep it away from walls, metal, mirrors and electronics (microwave oven, baby monitor)
• Antennas: Point one antenna vertically and one horizontally (if it has several)

Step 2: connect the equipment

Follow this order:

1. Connect the phone, cable or fibre line to the modem
2. Connect an Ethernet cable from the modem to the router’s WAN (Internet) port
3. Turn on the modem and wait 2 minutes for it to connect
4. Turn on the router and wait 2 minutes
5. Check that the lights show a stable connection (green/blue, not red)

Step 3: open the router’s admin interface

Configure the router through its web interface:

1. Connect your computer to the router by cable or Wi-Fi (use the default password on the router’s sticker)
2. Open a web browser and enter the router’s IP address (usually 192.168.1.1 or 192.168.0.1)
3. Log in with the default username and password (often admin/admin, or printed on the sticker)

Step 4: basic Wi-Fi settings

Configure these important settings:

Network name (SSID)

Choose a unique name you will easily recognise (e.g. “Flat_Zagreb_5th_floor”).

Wi-Fi password

Set a strong password of at least 12 characters (upper and lower case, numbers, symbols). Never keep the factory password!

Encryption

Choose WPA3 or WPA2-PSK (AES). Never WEP or an open network!

Wi-Fi channels

• 2.4 GHz: Use channels 1, 6 or 11 (the least overlap with neighbouring networks)
• 5 GHz: Automatic selection or channels 36–48 (less interference)

Step 5: advanced settings (optional)

Guest network

Create a separate Wi-Fi network for guests that has no access to your devices and files.

QoS (quality of service)

Give priority to important devices (game console, work laptop) so they get preference in network traffic.

Port forwarding

Needed for some applications, game servers or remote access to a computer.

DHCP reservations

Give important devices (printer, NAS, smart TV) fixed IP addresses.

Optimising Wi-Fi signal and speed

1. Analyse the Wi-Fi channels

Use free tools such as WiFi Analyzer (Android) or NetSpot (Windows/Mac) to see which channels are the most crowded, then move your router to a quieter one.

2. Use the 5 GHz band

For devices close to the router (gaming, streaming), use the 5 GHz band – it is faster but has a shorter range. Use 2.4 GHz for devices further away and for smart home devices.

3. Update the router firmware

Manufacturers regularly release firmware updates with better performance and security. Check for them in the router’s admin interface.

4. Limit the number of connected devices

Too many devices slow the network down. Disconnect the ones you do not use.

5. Use a cable wherever you can

Desktop computers, game consoles and smart TVs work best on a cable – faster and more stable than Wi-Fi.

Home network security

Protect your network from attackers and unauthorised access:

• A strong Wi-Fi password: At least 12 characters, mixing letters, numbers and symbols
• Change the factory admin password: Factory passwords are publicly known
• Turn off WPS: WPS is vulnerable to PIN-guessing attacks
• Disable remote management: Unless you really need it
• Update the firmware regularly: Security patches matter
• Use a VPN: For extra encryption and privacy
• Separate IoT devices: Put smart devices on their own network (e.g. the guest network)

Fixing the most common problems

Problem: slow internet

Solutions:

• Measure your speed at Speedtest.net – if the speed over a cable is fine, the problem is the Wi-Fi signal
• Restart the modem and router (turn them off for 30 seconds, then back on)
• Check that all your devices are up to date
• Change the Wi-Fi channel
• Contact your internet provider

Problem: “dead zones” with no Wi-Fi

Solutions:

• Move the router to a central spot
• Get a range extender or a mesh system
• Use Powerline adapters

Problem: devices cannot connect

Solutions:

• Check the password (it is case-sensitive)
• Forget the network on the device and connect again
• Reset the network settings on the device
• Check whether the router’s maximum number of connected devices has been reached

Problem: unstable signal

Solutions:

• Move the router away from the microwave, cordless phone and baby monitor
• Change the Wi-Fi channel
• Update the network adapter driver on your computer

Conclusion

A good home network is the foundation of a modern home. With the right setup, optimisation and security settings you can enjoy fast, stable internet on all your devices. If you would rather have it done properly without the hassle, Perfect Light in Zagreb offers a complete home network setup service – in English or Croatian.

Remember: a good router, a central position, a strong password and regular updates are the keys to a reliable home network!