Atasi Masalah Internet

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Pick the problem you are having and follow the steps in order. Each step includes the fix and, where useful, a one-click test to confirm it worked.

Pemeriksaan otomatis cepat
InternetMemeriksa…
LatensiMemeriksa…
DNSMemeriksa…
IPv6Memeriksa…

  1. Check the lights on your modem/router. A red or blinking "Internet", "WAN", "DSL" or "Online" light means the line itself is down.
  2. Power-cycle in the right order: unplug the modem and router, wait 30 seconds, plug in the modem first and wait until it is fully online (2–3 minutes), then the router.
  3. Check for an outage on your ISP's status page or app, ideally from your phone's mobile data.
  4. Check cables: reseat the coax, fibre or phone cable and the Ethernet cable between modem and router.
  5. Log in to the router (often 192.168.1.1 or 192.168.0.1) and see whether it has a WAN IP address. If its WAN address is blank or in 169.254.x.x, the ISP connection is down.
  6. If nothing helps, contact your ISP. Note which lights are on and that you already restarted the equipment.

  1. Test another device. If others work, the problem is this device; if none work, follow "No internet on any device".
  2. Check the IP address. An address starting with 169.254 means the device did not get one from the router (DHCP failure). Use the IP type checker if unsure.
  3. Forget and rejoin the network, re-entering the password.
  4. Renew the IP and reset the network stack on Windows (run as administrator): 
    ipconfig /release
ipconfig /renew
ipconfig /flushdns
netsh winsock reset
    then restart. On macOS: System Settings → Network → Wi-Fi → Details → TCP/IP → Renew DHCP Lease.
  5. Disable VPNs, proxies and security software temporarily.
  6. Hotel or café Wi-Fi? Open http://neverssl.com to trigger the sign-in page.

  1. Measure first: run our ping and jitter test, then a speed test, once on Wi-Fi and once wired if possible.
  2. Find the bandwidth hog: pause cloud backups, game updates, torrents and 4K streams on other devices.
  3. Improve Wi-Fi: move closer, use the 5 GHz or 6 GHz band, keep the router high and central, and change the channel if neighbours are crowding yours.
  4. Restart the router and update its firmware.
  5. Compare with your plan. If wired speeds are far below what you pay for at several times of day, contact your ISP.
  6. Old hardware: routers and adapters older than Wi-Fi 5 (802.11ac) often cap real-world speeds.

  1. Wired or wireless? If drops happen only on Wi-Fi, it is interference or range: change channel, move the router, or add a mesh node.
  2. Run a long ping to your router and to the internet at the same time (ping -t 192.168.1.1 and ping -t 1.1.1.1 on Windows). Losses to the router point at your Wi-Fi; losses only to the internet point at the ISP line. See how to use ping and traceroute.
  3. Check the modem log for repeated resyncs or "T3/T4 timeouts" (cable), which indicate a line fault only the ISP can fix.
  4. Disable power saving on the network adapter (Windows Device Manager → adapter → Power Management).
  5. Overheating: make sure the router has airflow.

  1. Is it down for everyone? Check with Is It Down?.
  2. Try a private window to rule out extensions and cached data, then clear the site's cookies.
  3. Flush DNS (ipconfig /flushdns) and compare DNS records with what your computer resolves using nslookup example.com.
  4. Certificate warnings? Check your device's date and time, then test the site with the SSL checker.
  5. Blocked by your network? Parental controls, school/work filters or ISP blocks can stop certain sites. Try mobile data to compare.

  1. Check the spelling and whether the domain still exists with WHOIS.
  2. Flush DNS caches: Windows ipconfig /flushdns; macOS sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder; Chrome chrome://net-internals/#dns.
  3. Switch to a public resolver such as 1.1.1.1 or 8.8.8.8 in your router or device settings.
  4. Recently changed DNS for your own site? Watch the DNS propagation checker, and test DNSSEC: a broken DNSSEC setup causes failures only on validating resolvers.

  1. Measure jitter and packet loss with the ping test. Jitter above about 30 ms or any packet loss causes stutter.
  2. Use Ethernet for consoles and PCs; Wi-Fi adds variable delay.
  3. Enable QoS / Smart Queue Management on the router to stop uploads from swamping your connection (bufferbloat).
  4. Choose nearby game servers, and avoid VPNs that route you far away.
  5. Strict or moderate NAT type? Check whether you are behind carrier-grade NAT and test forwarded ports with the port checker.

  1. Confirm your public IP on the What's My IP Number page. If it changes often, use dynamic DNS.
  2. Check for CGNAT: if the router's WAN address is in 100.64.0.0/10 or private space, inbound connections cannot reach you. Ask your ISP for a public IPv4 address, or use IPv6 or a tunnel/VPN service.
  3. Set up port forwarding to the device's fixed local IP, then confirm with the open port checker.
  4. Allow the port in the device's own firewall, and make sure the service is running.
  5. Prefer a VPN (such as WireGuard) over exposing cameras and NAS admin pages directly to the internet.

  1. Check the domain's mail servers with MX lookup.
  2. Validate SPF, DKIM and DMARC with the email authentication checker; missing records are the most common cause.
  3. Check the sending IP's reputation with the blacklist check and confirm it has valid reverse DNS.
  4. Read the bounce message: codes like 550 5.7.1 usually name the exact policy that rejected the mail.

Cara sistematis mengatasi masalah internet

Sebagian besar masalah koneksi bisa diselesaikan dengan bekerja dari komponen terdekat ke luar: perangkat Anda → Wi-Fi atau kabel Anda → router Anda → modem dan jalur ISP Anda → internet yang lebih luas → website itu sendiri. Menguji setiap lapisan secara berurutan memberi tahu persis di mana koneksi bermasalah, sehingga Anda memperbaiki hal yang tepat alih-alih menebak. Pemeriksaan cepat di atas sudah memberi tahu apakah Anda dapat menjangkau internet, seberapa responsif koneksi Anda, apakah DNS berfungsi, dan apakah Anda memiliki IPv6.

Lima perintah yang harus diketahui setiap pemecah masalah

PerintahYang diberitahukan
ipconfig /all · ip addrIP lokal, gateway (router), dan server DNS Anda.
ping 192.168.1.1Apakah perangkat Anda dapat menjangkau router.
ping 1.1.1.1Apakah Anda dapat menjangkau internet tanpa memerlukan DNS.
nslookup example.comApakah resolusi DNS berfungsi.
tracert · tracerouteDi bagian mana sepanjang jalur koneksi melambat atau berhenti.

Jika ping 1.1.1.1 berhasil tetapi ping example.com gagal, Anda mengalami masalah DNS. Jika ping ke router gagal, masalahnya ada di dalam jaringan rumah Anda. Untuk penjelasan terperinci, baca Cara mengatasi masalah koneksi internet yang umum.

Pertanyaan yang sering diajukan

Mengapa me-restart router memperbaiki begitu banyak masalah?

Restart membersihkan kebocoran memori dan tabel koneksi yang macet, memperbarui koneksi dengan ISP Anda, dan sering mendapatkan alamat IP baru.

Bagaimana saya tahu apakah ISP yang bermasalah?

Jika perangkat yang tersambung langsung dengan kabel ke modem masih tidak punya koneksi atau performanya sangat buruk setelah restart, dan lampu status atau log modem menunjukkan error, kesalahannya ada di sisi ISP.

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