Quick Summary
The error "error:0a00010b::ssl routines:ssl3 decrypt record:wrong version number" indicates a problem during the SSL/TLS handshake process, specifically related to the version of the SSL/TLS protocol being used. The client and server are attempting to communicate using incompatible or unsupported SSL/TLS versions, leading to a failure to decrypt the data.
Common Causes
- Mismatched SSL/TLS Versions: The client and server are configured to use different, incompatible SSL/TLS protocol versions. For instance, the client might be attempting to connect using TLS 1.0, while the server only supports TLS 1.2 or higher.
- Protocol Downgrade Attacks: An attacker might be attempting a protocol downgrade attack, forcing the client and server to negotiate to a lower, less secure SSL/TLS version. This can be due to network manipulation or interception.
- Client Not Supporting Server's SSL/TLS Version: The client's SSL/TLS library might be outdated or not configured to support the SSL/TLS version required by the server. This is common with legacy clients or configurations.
- Server Not Supporting Client's SSL/TLS Version: The server's SSL/TLS configuration might not include the protocol version the client is trying to use. This can happen if the server has been configured to only support stronger, more recent protocols.
- Firewall/Proxy Interference: A firewall or proxy server between the client and server might be modifying or interfering with the SSL/TLS handshake process, leading to version negotiation issues.
Step-by-Step Fixes
Method 1: Ensure Client Supports Required SSL/TLS Versions Show Steps ↓
Step 1: Identify the SSL/TLS version required by the server. Check the server's documentation or configuration.
Step 2: Update the client's SSL/TLS library or configuration to ensure it supports the required version. How you do this is highly dependent on the client application, but commonly involves updating libraries or changing configuration files.
Step 3: If it's a browser, ensure it is up to date, and check its advanced security settings to enable the correct SSL/TLS versions. Ensure older, less secure protocols like SSLv3 and TLS 1.0 are disabled.
Method 2: Configure Server to Support Necessary SSL/TLS Versions Show Steps ↓
Step 1: Determine which SSL/TLS versions are supported and preferred by the client application.
Step 2: Modify the server's SSL/TLS configuration to include those versions. This typically involves editing configuration files (e.g., for Apache, Nginx, or other web servers) and restarting the server.
Step 3: Be sure to prioritize strong SSL/TLS versions (TLS 1.2 or TLS 1.3) and disable older, vulnerable protocols.
Method 3: Disable Incompatible SSL/TLS Versions Show Steps ↓
Step 1: On both the client and server, identify any enabled SSL/TLS versions that are known to be insecure or incompatible (e.g., SSLv3, TLS 1.0, TLS 1.1).
Step 2: Disable these versions in the client and server configurations. This can often be achieved by modifying configuration files or using command-line options during the client/server setup.
Method 4: Check Firewall/Proxy Settings Show Steps ↓
Step 1: Examine the configuration of any firewalls or proxy servers between the client and server.
Step 2: Ensure that they are not interfering with the SSL/TLS handshake process or modifying the SSL/TLS protocol versions being negotiated.
Step 3: If necessary, adjust the firewall/proxy settings to allow the client and server to negotiate a compatible SSL/TLS version.