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