Sentry – Prevents Brute Force Attacks Against SSH, FTP, SMTP and More

Supporting OS (operating system)

• FreeBSD
• Mac OS X
• Linux (CentOS, Debain, Ubuntu)

Download Command:

• bash || sh
• export SENTRY_URL=https://raw.githubusercontent.com/msimerson/sentry/master/sentry.pl
• curl -O $SENTRY_URL || wget $SENTRY_URL || fetch --no-verify-peer $SENTRY_URL

• perl sentry.pl --update
  Running sentry.pl --update will:
  • create the sentry database (if needed)
  • install the perl script (if needed)
  • prompt you to edit /etc/hosts.allow (if needed)

• blacklist – deny all future connections
• whitelist – whitelist all future connections, remove the IP from the blacklists, and make it immune to future connection tests.
• delist – remove an IP from the white and blacklists. This is useful for testing that sentry is working as expected.
• connect – register a connection by an IP. The connect method will log the attempt and the time. See CONNECT.
• update – Installs and update if a newer version is available. This is most reliable when LWP::UserAgent is installed.