SSH connection issues can range from mildly annoying to completely blocking your access. In 2026, most problems have straightforward fixes — you just need to know where to look. This guide covers every common SSH issue and gives you clear, step-by-step solutions.
Quick Diagnosis Checklist
Before diving into specific fixes, run through this checklist:
- Is your SSH account still active? Check at claudessh.com
- Does your device have an active internet connection?
- Are your host, username, and password entered correctly?
- Is the app updated to the latest version?
If all four are confirmed and the problem persists, proceed to the specific issue below.
Problem 1: Connection Timeout
Symptoms: App shows Connecting but never completes. Timeout after 30-60 seconds.
- Check account status — Log into claudessh.com and verify the account has not expired. Create a new one if needed.
- Verify credentials — Double-check hostname, port, username, and password.
- Switch port — If using port 443, try 80. If using 80, try 443.
- Try a different server — The server may be overloaded. Select a different country or location.
- Toggle airplane mode — Turn airplane mode on for 10 seconds, then off to reset your mobile connection.
Problem 2: Authentication Failed
Symptoms: Login failed, Invalid credentials, or the connection closes immediately after the handshake.
- Copy-paste credentials — Do not type them manually. Copy from claudessh.com and paste directly into the app.
- Check for spaces — Extra spaces before or after a username or password will cause authentication to fail.
- Case sensitivity — Usernames and passwords are case-sensitive on SSH servers.
- Multi-login limit — Some accounts limit simultaneous connections. Log out from other devices or create a new account.
- Expired account — Check claudessh.com and renew or create a new account.
Problem 3: Frequent Disconnections
Symptoms: Connection drops every few minutes and requires manual reconnection.
- Enable Keep Alive — In app settings, enable Keep Alive with a 30-second interval.
- Disable battery optimization — Go to Settings, Battery, Battery Optimization, find your SSH app, select Do not optimize.
- Check signal strength — Weak mobile signal is a common cause. Move to better reception or switch to WiFi.
- Update the app — Outdated versions have stability bugs. Update from Google Play Store.
- Lower MTU — Try MTU 1400 or 1200 in app settings for better stability on mobile networks.
Problem 4: Connected But Slow
Symptoms: Status shows connected but speeds are very low, videos buffer, pages load slowly.
- Switch server — Try a different server location. Less-congested servers give better speeds.
- Connect during off-peak hours — 2–7 AM gives the best speeds. Avoid 7–10 PM peak hours.
- Change protocol — If using SlowDNS, switch to SSH WebSocket for much better performance.
- Change DNS — Switch to 8.8.8.8 or 1.1.1.1 to reduce DNS lookup latency.
- Close background apps — Other apps consuming bandwidth throttle your tunnel speed.
Problem 5: Connected But No Internet Access
Symptoms: SSH shows CONNECTED but browser cannot load pages and apps show no internet.
- Check DNS settings — Set DNS to 8.8.8.8 manually. A broken DNS means domains cannot resolve.
- Flush DNS cache — Toggle airplane mode briefly to clear DNS cache on Android.
- Check routing — Make sure the app routes all traffic through the tunnel.
- Restart the connection — Disconnect, wait 10 seconds, reconnect.
- Reinstall the app — A clean reinstall fixes corrupted routing configurations.
Problem 6: High Battery Drain
Symptoms: Phone battery depletes fast while connected, device runs warm.
- Switch to SSH WebSocket — SlowDNS uses more CPU. Switching reduces battery consumption significantly.
- Use split tunneling — Route only the apps that need the tunnel instead of all traffic.
- Reduce Keep Alive frequency — Increase the interval from 30 to 60 seconds.
- Disconnect when not in use — Most effective fix.
Problem 7: App Crashes or Freezes
- Go to Settings, Apps, your SSH app, Storage
- Tap Clear Cache first and retry
- If that does not work, tap Clear Data and reconfigure
- If still crashing, uninstall and reinstall from Google Play Store
- Verify your Android version meets app requirements
Advanced Troubleshooting
Enable debug logging: Most SSH apps have a debug mode. Enable it, reproduce the issue, then review the log. Common errors: Host unreachable (server down), Connection refused (wrong port), Permission denied (wrong credentials).
Test with ping: Before connecting, ping your SSH host. If ping times out, the server may be down — try a different one from claudessh.com.
Try a different protocol: If SSH WebSocket is failing, try SSH SSL/TLS or SlowDNS. Having accounts for multiple protocols is the best defense against connectivity issues.
When to Contact Support
If all steps fail, contact ClaudeSSH support via the Contact page or Telegram. Include: your exact error message, protocol and server used, device model and Android version, time when the issue started, and steps you already tried.
Summary
Most SSH problems stem from expired accounts, wrong credentials, or ISP interference. Work through this guide systematically and you will solve the issue in the majority of cases. Keep multiple backup accounts from claudessh.com across different server regions — it is the single best strategy against unexpected downtime.