^\w{3} [ :0-9]{11} [._[:alnum:]-]+ sshd\[[0-9]+\]: warning: /etc/hosts\.(allow|deny), line [0-9]+: can't verify hostname: getaddrinfo\([._[:alnum:]-]+, AF_INET\) failed$ ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ sshd\[[0-9]+\]: warning: /etc/hosts\.(allow|deny), line [0-9]+: host name/(name|address) mismatch: [._[:alnum:]-]+ != [._[:alnum:]-]+$ ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ sshd\[[0-9]+\]: reverse mapping checking getaddrinfo for [._[:alnum:]-]+ (\[[:.[:xdigit:]]+\] )?failed - POSSIBLE BREAK-?IN ATTEMPT!$ ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ sshd\[[0-9]+\]: Address [._[:alnum:]-]+ maps to [._[:alnum:]-]+, but this does not map back to the address - POSSIBLE BREAK-?IN ATTEMPT!$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: fatal: Write failed: Broken pipe$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: fatal: Write failed: Connection (timed out|reset by peer)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: error: PAM: User not known to the underlying authentication module for i(llegal|nvalid) user [^[:space:]]+ from ([:.[:xdigit:]]+|UNKNOWN|[-_.[:alnum:]]+)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: error: PAM: Authentication failure for [^[:space:]]+ from ([:.[:xdigit:]]+|UNKNOWN|[-_.[:alnum:]]+)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: I(llegal|nvalid) user [^[:space:]]+ from ([:.[:xdigit:]]+|UNKNOWN)$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: Failed (keyboard-interactive/pam|password|none) for (i(llegal|nvalid) user )?[^[:space:]]+ from ([:.[:xdigit:]]+|UNKNOWN|[-_.[:alnum:]]+) port [[:digit:]]{1,5} ssh2?$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: pam_unix\(sshd:auth\): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=[^[:space:]]+([[:space:]]+user=[^[:space:]]+)?$ ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd: pam_unix\(ssh:[[:alnum:]]+\): authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=[-_.:[:alnum:]]+ user=[-_.[:alnum:]]+$ ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ sshd\[[0-9]+\]: fatal: recv_rexec_state: ssh_msg_recv failed$