SSLSCAN(1)

NAME
sslscan - Fast SSL/TLS scanner

SYNOPSIS
sslscan [options] [host:port | host]

DESCRIPTION

sslscan queries SSL/TLS services (such as HTTPS) and reports the protocol versions, cipher suites, key exchanges, signature algorithms, and certificates in use. This helps the user understand which parameters are weak from a security standpoint.

Terminal output is thus colour-coded as follows:

Red Background NULL cipher (no encryption)
Red Broken cipher (<= 40 bit), broken protocol (SSLv2 or SSLv3) or broken certificate signing algorithm (MD5)
Yellow Weak cipher (<= 56 bit or RC4) or weak certificate signing algorithm (SHA-1)
Purple Anonymous cipher (ADH or AECDH)

sslscan can also output results into an XML file for easy consumption by external programs.

OPTIONS

--help
    Show summary of options

--targets=<file>
    A file containing a list of hosts to check. Hosts can be supplied with ports (i.e. host:port). One target per line

--sni-name=<name>
    Use a different hostname for SNI

--ipv4, -4
    Force IPv4 DNS resolution. Default is to try IPv4, and if that fails then fall back to IPv6.

--ipv6, -6
    Force IPv6 DNS resolution. Default is to try IPv4, and if that fails then fall back to IPv6.

--show-certificate
    Display certificate information.

--show-certificates
    Display the full certificate chain.

--no-check-certificate
    --no-check-certificate Don't flag certificates signed with weak algorithms (MD5 and SHA-1) or short (<2048 bit) RSA keys

--show-client-cas
    Show a list of CAs that the server allows for client authentication. Will be blank for IIS/Schannel servers.

--show-ciphers
    Show a complete list of ciphers supported by sslscan

--show-cipher-ids
    Print the hexadecimal cipher IDs

--iana-names
    Use IANA/RFC cipher names rather than OpenSSL ones

--show-times
    Show the time taken for each handshake in milliseconds. Note that only a single request is made with each cipher, and that the size of the ClientHello is not constant, so this should not be used for proper benchmarking or performance testing.

    You might want to also use --no-cipher-details to make the output a bit clearer.

--ssl2
    Only check if SSLv2 is enabled

--ssl3
    Only check if SSLv3 is enabled

--tls10
    Only check TLS 1.0 ciphers

--tls11
    Only check TLS 1.1 ciphers

--tls12
    Only check TLS 1.2 ciphers

--tls13
    Only check TLS 1.3 ciphers

--tlsall
    Only check TLS ciphers (versions 1.0, 1.1, 1.2, and 1.3)

--ocsp
    Display OCSP status

--pk=<file>
    A file containing the private key or a PKCS#12 file containing a private key/certificate pair (as produced by MSIE and Netscape)

--pkpass=<password>
    The password for the private key or PKCS#12 file

--certs=<file>
    A file containing PEM/ASN1 formatted client certificates

--no-ciphersuites
    Do not scan for supported ciphersuites.

--no-fallback
    Do not check for TLS Fallback Signaling Cipher Suite Value (fallback)

--no-renegotiation
    Do not check for secure TLS renegotiation

--no-compression
    Do not check for TLS compression (CRIME)

--no-heartbleed
    Do not check for OpenSSL Heartbleed (CVE-2014-0160)

--no-groups
    Do not enumerate key exchange groups

--show-sigs
    Enumerate signature algorithms

--starttls-ftp
    STARTTLS setup for FTP

--starttls-imap
    STARTTLS setup for IMAP

--starttls-irc
    STARTTLS setup for IRC

--starttls-ldap
    STARTTLS setup for LDAP

--starttls-pop3
    STARTTLS setup for POP3

--starttls-smtp
    STARTTLS setup for SMTP

--starttls-mysql
    STARTTLS setup for MySQL

--starttls-xmpp
    STARTTLS setup for XMPP

--starttls-psql
    STARTTLS setup for PostgreSQL

--xmpp-server
    Perform a server-to-server XMPP connection. Try this if --starttls-xmpp is failing.

--rdp
    Send RDP preamble before starting scan.

--bugs
    Enables workarounds for SSL bugs

--timeout=<sec>
    Set socket timeout. Useful for hosts that fail to respond to ciphers they don't understand. Default is 3s.

--connect-timeout=<sec>
    Set initial connection timeout. Useful for hosts that are slow to respond to the initial connect(). Default is 75s.

--sleep=<msec>
    Pause between connections. Useful on STARTTLS SMTP services, or anything else that's performing rate limiting. Default is disabled.

--xml=<file>
    Output results to an XML file. - can be used to mean stdout.

--version
    Show version of program

--verbose
    Display verbose output

--no-cipher-details
    Hide NIST EC curve name and EDH/RSA key length.

--no-colour
    Disable coloured output.

EXAMPLES

Scan a local HTTPS server
    sslscan localhost
    sslscan 127.0.0.1
    sslscan 127.0.0.1:443
    sslscan [::1]
    sslscan [::1]:443

AUTHOR
sslscan was originally written by Ian Ventura-Whiting <fizz@titania.co.uk>.
sslscan was extended by Jacob Appelbaum <jacob@appelbaum.net>.
sslscan was extended by rbsec <robin@rbsec.net>.
This manual page was originally written by Marvin Stark <marv@der-marv.de>.