Explanation
What this error means
CE-105799-1 means “unable to connect to the server” — the console failed while talking to PlayStation’s online services. Sony’s own troubleshooting for this code runs the full network gamut: server status, router restarts, ports, and DNS. In practice it splits between PSN-side trouble and home-network issues roughly evenly.
Official reference: Sony support page for CE-105799-1
Diagnosis
Most likely causes
| Cause | How likely | Fixable at home? |
|---|---|---|
| PSN outage or maintenance | Likely | No — check the status page |
| Flaky Wi-Fi or router needing a restart | Likely | Yes |
| DNS not resolving Sony’s servers | Possible | Yes — change DNS |
| Ports blocked by router/ISP (strict NAT) | Possible | Usually — router settings |
Repair
How to fix it
Ordered easiest-first. Try the next step only if the error comes back.
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Check the PlayStation status page first
Open status.playstation.com on your phone. If anything is red or under maintenance, stop here — no local fix will help until Sony’s side recovers.
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Restart the PS5 and test the connection
Restart fully, then run Settings > Network > Connection Status > Test Internet Connection and note where it fails.
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Power-cycle your modem and router
Unplug both for at least 5 minutes (Sony’s recommended wait), then power them back on and retest.
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Go wired, or improve the wireless path
Use a LAN cable if possible. On Wi-Fi, move the console closer to the router and clear obstructions — Sony specifically suggests reviewing the installation location.
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Switch to a public DNS
In Settings > Network > Settings > Set Up Internet Connection, edit your connection’s DNS to a public resolver such as Google (8.8.8.8 / 8.8.4.4) or Cloudflare (1.1.1.1) and retest.
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Open PlayStation’s ports on the router
If the error persists, forward TCP 80, 443, 3478–3480 and UDP 3478, 3479, 49152–65535 — the exact ranges Sony lists for this code. Your router manual or ISP can help.
Escalation
When it's not your fault
Signs the problem is on Sony's side — or in the hardware — rather than anything you can change:
- status.playstation.com shows an outage, or the error coincides with a big game launch or PSN maintenance window.
- Every device in the house is online fine, other PS5 owners are reporting the same thing, and nothing changed on your network.
- The connection test passes “Obtain IP address” but fails only at PlayStation Network sign-in.
Questions
FAQ
Is CE-105799-1 my internet or PlayStation’s servers?
It can be either. Check status.playstation.com first; if it’s green, work through the local steps — restart, wired connection, DNS — which solve nearly all remaining cases.
Why does changing DNS fix this?
Your console finds Sony’s servers by name. If your ISP’s DNS resolver is slow or stale, lookups fail even though your internet works — a public resolver bypasses that weak link.
Do I really need to open those ports?
Usually not — most routers handle PSN fine out of the box. Port forwarding is the last resort for strict-NAT setups, and it’s also what helps party chat and multiplayer connectivity.