smithproxy

Smithproxy is fast transparent TCP/UDP/TLS (SSL) proxy. It's highly configurable and got many features.

Core features:

• intercept routed traffic, locally-originated traffic and SOCKS requests
• Policy based traffic matching
• Per-policy applicable profiles
• Insightful CLI with configuration control

Policy profiles:

• content - replacing data online, writing to disk
• dns - dns inspection settigns
• tls - per-policy specific settigns
• auth - match users and enforce authentication

• detection - match specific patterns in the traffic

  TLS protocol:

• dumping plaintext to files, exporting sslkeylog
• TLS security checks (ocsp, ocsp stapling, automatic crl download)
• Certificate Transparency checks for outbound connections
• Html replacement warnings
• STARTTLS support
• Seamless redirection to login portal

Other:

• Simple authentication portal with local and ldap user support
• SOCKS4/SOCKS5 support with DNS
• DNS ALG
• policies based on FQDN or 2nd level domain
• both IPv4 and IPv6 is supported

Complementary tools:

• built-in tools to help with network redirections and certificates
• check pplay tool (https://pypi.org/project/pplay/): replays captures

   over the network