SYNOPSISsslscan [options] [host:port | host]
DESCRIPTIONThis manual page documents briefly the sslscan command
sslscan queries SSL/TLS services, such as HTTPS, in order to determine the ciphers that are supported.
SSLScan is designed to be easy, lean and fast. The output includes preferred ciphers of the SSL/TLS service, and text and XML output formats are supported. It is TLS SNI aware when used with a supported version of OpenSSL.
Output is colour coded to indicate security issues. Colours are 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)
Show summary of options
- Show version of program
- A file containing a list of hosts to check. Hosts can be supplied with ports (i.e. host:port). One target per line
Force IPv4 DNS resolution. Default is to try IPv4, and if that fails then fall back to IPv6.
Force IPv6 DNS resolution. Default is to try IPv4, and if that fails then fall back to IPv6.
- Display certificate information.
- Don't flag certificates signed with weak algorithms (MD5 and SHA-1) or short (<2048 bit) RSA keys
- Show a list of CAs that the server allows for client authentication. Will be blank for IIS/Schannel servers.
- Show a complete list of ciphers supported by sslscan
- Print the hexadecimal cipher IDs
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.
Only check SSLv2 ciphers
Note that this option may not be available if system OpenSSL does not support SSLv2. Either build OpenSSL statically or rebuild your system OpenSSL with SSLv2 support. See the readme for further details.
Only check SSLv3 ciphers
Note that this option may not be available if system OpenSSL does not support SSLv3. Either build OpenSSL statically or rebuild your system OpenSSL with SSLv3 support. See the readme for further details.
Only check TLS 1.0 ciphers
Only check TLS 1.1 ciphers
Only check TLS 1.2 ciphers
Only check TLS ciphers (versions 1.0, 1.1 and 1.2)
Display OCSP status
- A file containing the private key or a PKCS#12 file containing a private key/certificate pair (as produced by MSIE and Netscape)
- The password for the private key or PKCS#12 file
- A file containing PEM/ASN1 formatted client certificates
- Do not scan for supported ciphersuites.
- Do not check for secure TLS renegotiation
- Do not check for TLS compression (CRIME)
- Do not check for OpenSSL Heartbleed (CVE-2014-0160)
- STARTTLS setup for FTP
- STARTTLS setup for IRC
- STARTTLS setup for IMAP
- STARTTLS setup for POP3
STARTTLS setup for SMTP
Note that some servers hang when we try to use SSLv3 ciphers over STARTTLS. If you scan hangs, try using the --tlsall option.
- STARTTLS setup for PostgreSQL
- STARTTLS setup for XMPP
- Perform a server-to-server XMPP connection. Try this if --starttls-xmpp is failing.
Send RDP preamble before starting scan.
Makes a HTTP request after a successful connection and returns the server response code
Hide NIST EC curve name and EDH/RSA key length. Requires OpenSSL >= 1.0.2 (so if you distro doesn't ship this, you'll need to statically build sslscan).
Enables workarounds for SSL bugs
Set socket timeout. Useful for hosts that fail to respond to ciphers they don't understand. Default is 3s.
Pause between connections. Useful on STARTTLS SMTP services, or anything else that's performing rate limiting. Default is disabled.
Output results to an XML file
Disable coloured output.
Scan a local HTTPS server
sslscan localhost sslscan 127.0.0.1 sslscan 127.0.0.1:443 sslscan [::1] sslscan [::1]:443