Veja a página sshd_config man:
ListenAddressSpecifies the local addresses sshd(8) should listen on. The following forms may be used:
ListenAddress host|IPv4_addr|IPv6_addrListenAddress host|IPv4_addr:portListenAddress [host|IPv6_addr]:portIf port is not specified,
sshdwill listen on the address and all priorPortoptions specified. The default is to listen on all local addresses. MultipleListenAddressoptions are permitted. Additionally, anyPortoptions must precede this option for non-port qualified addresses.
Mais geralmente, para ssh e sshd , observe que a documentação está dividida entre sshd(8) , ssh(1) , sshd_config(5) e ssh_config(5) ,