1 This module matches packets related to a specific conntrack-helper. 2 .TP 3 .BI "--helper " "string" 4 Matches packets related to the specified conntrack-helper. 5 .RS 6 .PP 7 string can be "ftp" for packets related to a ftp-session on default port. 8 For other ports append -portnr to the value, ie. "ftp-2121". 9 .PP 10 Same rules apply for other conntrack-helpers. 11 .RE 12