Fix Metasploit error “The following options failed to validate: RHOSTS”

Fix Metasploit error “The following options failed to validate: RHOSTS”

The Metasploit Project is a computer security project that provides information about security vulnerabilities and aids in penetration testing and IDS signature development.

Its best-known sub-project is the open source Metasploit Framework, a tool for developing and executing exploit code against a remote target machine. Other important sub-projects include the Opcode Database, shellcode archive and related research.

The Metasploit Project is well known for its anti-forensic and evasion tools, some of which are built into the Metasploit Framework.

Some users get this error “The following options failed to validate: RHOSTS”

NOTE: This is not an error in Metasploit or in Kali Linux, it’s rather a syntax error on users end. Quite trivial, but an error nevertheless.

When setting RHOSTS you might encounter this error.

msf auxiliary(syn) > set RHOST 10.10.0.7

RHOST => 10.10.0.7

msf auxiliary(syn) > run

[-] Auxiliary failed: Msf::OptionValidateError The following options failed to validate: RHOSTS.

It’s because you’re using RHOST instead of RHOSTS. Even if you have single IP instead of multiple, you’ll have to use RHOSTS and it will work fine.

msf (syn) > set RHOSTS 10.10.0.7
msf (syn) > run

This should fix this little error. Hope that helps someone. Thanks for reading, please share.