projectdiscovery/fastdialer

Dialer with DNS Cache + Dial History

Go

70

717 commits

updated Oct 5, 2026

See the code

README

Fastdialer

License Go version Release Checks GoDoc

Fastdialer is implementation of net.Dialer with lot of features like DNS Cache , Dial History etc

Features

  • DNS Cache
  • Dial History
  • Supports Memory/Hybrid/Disk Cache.
  • Supports Old/New TLS and x509 versions
  • Supports Resolution Using Hosts File
  • Cross Platform and more..

For more details and documentation refer GoDoc.

ZTLS Fallback

fastdialer by default fallbacks to using zcrypto when there is an error in TLS handshake (insufficient security level etc ). This is done to support older TLS versions and ciphers. This can be disabled in fastdialer options or by using DISABLE_ZTLS_FALLBACK=true environment variable. when falling back to ztls, ChromeCiphers are used

Example

An Example showing usage of fastdialer as a library is specified here

cd example/
go run main.go

License

fastdialer is distributed under MIT License

lib

projectdiscovery/fastdialer

Dialer with DNS Cache + Dial History

Go

70

717 commits

updated Oct 5, 2026

See the code

README

Fastdialer

License Go version Release Checks GoDoc

Fastdialer is implementation of net.Dialer with lot of features like DNS Cache , Dial History etc

Features

  • DNS Cache
  • Dial History
  • Supports Memory/Hybrid/Disk Cache.
  • Supports Old/New TLS and x509 versions
  • Supports Resolution Using Hosts File
  • Cross Platform and more..

For more details and documentation refer GoDoc.

ZTLS Fallback

fastdialer by default fallbacks to using zcrypto when there is an error in TLS handshake (insufficient security level etc ). This is done to support older TLS versions and ciphers. This can be disabled in fastdialer options or by using DISABLE_ZTLS_FALLBACK=true environment variable. when falling back to ztls, ChromeCiphers are used

Example

An Example showing usage of fastdialer as a library is specified here

cd example/
go run main.go

License

fastdialer is distributed under MIT License

lib

Significant stargazers

Daniel Sokil

125 followers · starred Mar 2026