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Common Issue2025 Updated

Fix Proxy Authentication Errors

Resolve 407 Proxy Authentication Required errors, invalid credential issues, and login failures. Step-by-step solutions for all platforms.

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Quick Check

1. Username Format

Must be exactly as shown in dashboard

2. Special Characters

URL-encode: @ → %40, # → %23

3. Active Subscription

Check bandwidth/port expiry

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407 Proxy Authentication Required

The proxy server requires authentication but either no credentials were provided, or the provided credentials were rejected.

Solutions

1

Verify Credentials in Dashboard

  1. aLog in to client.proxies.sx
  2. bGo to "My Proxies" → Select your port
  3. cCopy the exact username and password (use copy button)
2

Check URL Encoding

If your password contains special characters, they must be URL-encoded:

# Wrong (special characters break the URL)
http://user:p@ss#123@proxy-host.com:8080
# Correct (URL-encoded)
http://user:p%40ss%23123@proxy-host.com:8080
CharacterEncoded
@%40
#%23
:%3A
/%2F
?%3F
&%26
3

Check Account Status

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Bandwidth Balance

Ensure you have remaining GB

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Port Expiry

Check if port subscription is active

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IP Whitelist

If using IP auth, verify your current IP

Still Having Issues?

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Test Proxy

Verify connectivity and auth

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Contact Support

24/7 technical assistance

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Connection Issues

Network troubleshooting

Related Guides

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Connection Issues

Fix timeout errors

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Speed Issues

Optimize performance

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Chrome Setup

Browser configuration

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Documentation

Full API reference