gnutls-serv - GNU TLS test server


gnutls-serv [options]


Simple server program that listens to incoming TLS connections.


Program control options

--copyright prints the program’s license
-d, --debug LEVEL Specify the debug level. Default is 1.
-h, --help prints this help
-l, --list Print a list of the supported algorithms and modes.
-q, --quiet Suppress some messages.
-v, --version prints the program’s version number

Server options

-p, --port integer The port to listen on.
--nodb Does not use the resume database.
--http Act as an HTTP Server.
--echo Act as an Echo Server.

TLS/SSL control options

--priority PRIORITY STRING TLS algorithms and protocols to enable. Unless the first keyword is "NONE" the defaults are:
Protocols: TLS1.1, TLS1.0, and SSL3.0.
Compression: NULL.
Certificate types: X.509, OpenPGP.
You can also use predefined sets of ciphersuites such as:
PERFORMANCE all the "secure" ciphersuites are enabled, limited to 128 bit ciphers and sorted by terms of speed performance.
NORMAL option enables all "secure" ciphersuites. The 256-bit ciphers are included as a fallback only. The ciphers are sorted by security margin.
SECURE128 flag enables all "secure" ciphersuites with ciphers up to 128 bits, sorted by security margin.
SECURE256 flag enables all "secure" ciphersuites including the 256 bit ciphers, sorted by security margin.
EXPORT all the ciphersuites are enabled, including the low-security 40 bit ciphers.
NONE nothing is enabled. This disables even protocols and compression methods.
Special keywords:
To avoid collisions in order to specify a compression algorithm in this string you have to prefix it with "COMP-", protocol versions with "VERS-" and certificate types with "CTYPE-". All other algorithms don’t need a prefix.

-g, --generate Generate Diffie Hellman Parameters.
--kx kx1 kx2... Key exchange methods to enable (use gnutls-cli --list to show the supported key exchange methods).
-p, --port integer The port to connect to.

Certificate options

--pgpcertfile FILE PGP Public Key (certificate) file to use.
--pgpkeyfile FILE PGP Key file to use.
--pgpkeyring FILE PGP Key ring file to use.
--pgptrustdb FILE PGP trustdb file to use.
--srppasswd FILE SRP password file to use.
--srppasswdconf FILE SRP password configuration file to use.
--x509cafile FILE Certificate file to use.
--x509certfile FILE X.509 Certificate file to use.
--x509fmtder Use DER format for certificates
--x509keyfile FILE X.509 key file to use.


gnutls-cli(1), gnutls-cli-debug(1)


Nikos Mavroyanopoulos <> and others; see /usr/share/doc/gnutls-bin/AUTHORS for a complete list.

This manual page was written by Ivo Timmermans <>, for the Debian GNU/Linux system (but may be used by others).

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