List of connection-tracking helpers that are auto-loaded. The complete list of possible values is given in the example.
As helpers can pose as a security risk, it is advised to set this to an empty list and disable the setting networking.firewall.autoLoadConntrackHelpers unless you know what you are doing. Connection tracking is disabled by default.
Loading of helpers is recommended to be done through the CT target. More info: https://home.regit.org/netfilter-en/secure-use-of-helpers/
Declarations
Type
list of stringDefault
[ ]Example
[
"ftp"
"irc"
"sane"
"sip"
"tftp"
"amanda"
"h323"
"netbios_sn"
"pptp"
"snmp"
]