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Rex-1.16.1
⭐ Starred 717 / Rex::Resource::firewall
Security Advisories (1)
CVE-2026-94140 (2026-10-21)

Rex versions through 1.16.1 for Perl accept an unknown SSH host key for remote rsync transfers because sync hardcodes StrictHostKeyChecking=no. Every remote branch of sync builds its ssh command with that option, for password authentication, for private-key authentication and for the fallback. The ssh options a caller sets through set_openssh_opt reach the OpenSSH transport but not this command, so there is no configuration that restores host key checking for the transfer. An attacker who can redirect the connection before the real host key is known presents their own and the transfer proceeds: under password authentication sync sends the connection password to that server, an upload writes the selected local files to it, and a download writes what it returns to the local destination.

NAME

Rex::Resource::firewall - Firewall functions

DESCRIPTION

With this module it is easy to manage different firewall systems.

SYNOPSIS

# Configure a particular rule
task "configure_firewall", "server01", sub {
  firewall "some-name",
    ensure      => "present",
    proto       => "tcp",
    action      => "accept",
    source      => "192.168.178.0/24",
    destination => "192.168.1.0/24",
    sport       => 80,
    sapp        => 'www',    # source application, if provider supports it
    port        => 80,       # same as dport
    dport       => 80,
    app         => 'www',    # same as dapp, destination application, if provider supports it
    dapp        => 'www',    # destination application, if provider supports it
    tcp_flags   => ["FIN", "SYN", "RST"],
    chain       => "INPUT",
    table       => "nat",
    jump        => "LOG",
    iniface     => "eth0",
    outiface    => "eth1",
    reject_with => "icmp-host-prohibited",
    log         => "new|all",  # if provider supports it
    log_level   => "",         # if provider supports it
    log_prefix  => "FW:",      # if provider supports it
    state       => "NEW",
    ip_version  => -4;         # for iptables provider. valid options -4 and -6
};

# Add overall logging (if provider supports)
firewall "some-name",
  provider => 'ufw',
  logging  => "medium";

EXPORTED RESOURCES

firewall($name, %params)