Surfshark is generally one of the more reliable VPNs, but like any VPN it can fail to connect due to protocol conflicts, network restrictions, or app-level issues. This guide covers the most effective fixes — the same troubleshooting steps used by Surfshark’s own support team, tested and confirmed to work in 2026.
If you’re in a hurry, start with Fix #1 (switch protocol) — it resolves the majority of connection failures.
Fix #1: Switch VPN Protocol
The most common cause of Surfshark connection failures is a protocol conflict with your network. Different protocols use different ports, and some networks (work, school, or ISP-level) block specific ports.
To switch protocol in Surfshark: open the app → go to Settings → VPN Settings → Protocol, then try each option:
- WireGuard — fastest, best for most users. Surfshark uses port 51820.
- OpenVPN UDP — reliable on most networks. Uses port 1194.
- IKEv2 — good for mobile devices and switching networks. Uses port 500.
- OpenVPN TCP — slowest but most firewall-resistant. Try this if all others fail.
After switching, attempt to connect again. If one protocol fails, try all of them before moving on to other fixes.
Fix #2: Connect to a Different Server
The specific server you’re trying to connect to may be experiencing maintenance or heavy congestion. Simply switch to a different server location — from the Locations tab, pick a different country or city and try again.
If you’re connecting to the US, try US – New York instead of US – Los Angeles, or try a different country entirely (e.g., UK or Netherlands). This alone fixes a surprising number of connection problems.
Fix #3: Disable IPv6 on Your Device
Surfshark currently does not support IPv6. If your network has IPv6 enabled, it can interfere with the VPN tunnel and cause connection failures or IP leaks.
On Windows: Go to Control Panel → Network and Sharing Center → Change adapter settings → right-click your network connection → Properties → uncheck Internet Protocol Version 6 (TCP/IPv6).
On Mac: System Settings → Network → select your connection → Details → TCP/IP tab → set Configure IPv6 to Link-local only.
On iOS: Go to Settings → Cellular → Cellular Data Options → Cellular Network Selection → choose Automatic and set to 3G or LTE only.
Fix #4: Disable Antivirus or Firewall Temporarily
Antivirus software and third-party firewalls sometimes flag VPN apps as suspicious because they modify network settings. This can block Surfshark from establishing a connection.
Temporarily disable your antivirus and try connecting again. If it works, add Surfshark as an exception in your antivirus settings rather than leaving it disabled. Also, make sure no other VPN software is running at the same time — conflicting VPN apps are a common hidden cause of connection failures.
On Windows: Check Windows Defender Firewall → Allow an app through firewall → ensure Surfshark is checked for both Private and Public networks.
Fix #5: Wait for the App to Fully Initialize
This is a less obvious but highly effective tip: when you first open Surfshark, it needs 30–60 seconds to initialize before it can establish a stable connection. If you try to connect immediately after launching, the connection will often fail or drop within 10 seconds.
The correct approach: open the app, wait until “Recently Used” servers appear under the Quick Connect button — this indicates initialization is complete. Then connect. Success rates increase dramatically with this simple adjustment.
If you’re using a laptop and rarely close the app, keeping Surfshark minimized (rather than closing it) means it stays initialized and reconnects much faster next time.
Fix #6: Set Custom DNS
DNS mismatches can cause Surfshark to connect but fail to load pages, or prevent the connection from completing. Setting a custom DNS can resolve this.
Surfshark recommends these DNS addresses for resolving connectivity issues:
- Primary DNS: 162.252.172.57
- Secondary DNS: 149.154.159.92
You can set these in your router settings or directly on your device’s network configuration. After updating, restart Surfshark and try again.
Fix #7: Update or Reinstall the App
Outdated Surfshark versions may have routing bugs or lack support for the latest server configurations. Check for updates inside the app or on Surfshark’s website.
If updating doesn’t help, do a clean reinstall: uninstall Surfshark completely, restart your device, then download and install the latest version from Surfshark’s official website. This clears any corrupted configuration files that might be causing the issue.
Fix #8: Use the Built-in Diagnostic Tool (Windows)
On Windows, Surfshark includes a built-in diagnostic tool that can reset network settings and fix common issues automatically.
To access it: navigate to C:\Program Files (x86)\Surfshark\ and run SurfsharkDiagnostics.exe as administrator. You’ll see two options:
- Reset network — resets network adapter settings. Try this first.
- Restore original settings — a deeper reset. Use this if Reset network doesn’t help.
After running either option, restart your device and try connecting again.
Still Not Working? Try a Different VPN
If none of the above fixes resolve your issue, the problem may be network-level blocking that Surfshark’s standard protocols can’t bypass. This is common in restrictive network environments (certain ISPs, corporate networks, or countries with VPN restrictions).
In these cases, ExpressVPN and NordVPN are worth trying — both offer obfuscated servers specifically designed to bypass deep packet inspection on restrictive networks. ExpressVPN’s Lightway protocol and NordVPN’s obfuscated servers are particularly effective for environments where standard VPN protocols are blocked.
Found a fix that worked for you, or still having issues? Leave a comment below with your device and network type — the community here is active and someone will likely have encountered the same situation.