1CONFIG_IP_NF_FTP 2PPTP conntrack and NAT support 3CONFIG_IP_NF_PPTP 4 This module adds support for PPTP (Point to Point Tunnelling Protocol, 5 RFC2637) conncection tracking and NAT. 6 7 If you are running PPTP sessions over a stateful firewall or NAT box, 8 you may want to enable this feature. 9 10 Please note that not all PPTP modes of operation are supported yet. 11 For more info, read top of the file net/ipv4/netfilter/ip_conntrack_pptp.c 12 13 If you want to compile it as a module, say M here and read 14 Documentation/modules.txt. If unsure, say `N'. 15 16GRE protocol conntrack and NAT support 17CONFIG_IP_NF_CT_PROTO_GRE 18 This module adds generic support for connection tracking and NAT of the 19 GRE protocol (RFC1701, RFC2784). Please note that this will only work 20 with GRE connections using the key field of the GRE header. 21 22 You will need GRE support to enable PPTP support. 23 24 If you want to compile it as a module, say `M' here and read 25 Documentation/modules.txt. If unsire, say `N'. 26