[NETFILTER]: nf_conntrack/nf_nat: add PPTP helper port

[deliverable/linux.git] / net / netfilter / Kconfig

diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index d1a365d83c53c443ce9f49802caa958b6ed8c261..6b2eb26ae03f43387d3f768765e2414289f20e32 100644 (file)
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -120,6 +120,10 @@ config NF_CONNTRACK_EVENTS
 
          If unsure, say `N'.
 
+config NF_CT_PROTO_GRE
+       tristate
+       depends on EXPERIMENTAL && NF_CONNTRACK
+
 config NF_CT_PROTO_SCTP
        tristate 'SCTP protocol on new connection tracking support (EXPERIMENTAL)'
        depends on EXPERIMENTAL && NF_CONNTRACK
@@ -213,6 +217,25 @@ config NF_CONNTRACK_NETBIOS_NS
 
          To compile it as a module, choose M here.  If unsure, say N.
 
+config NF_CONNTRACK_PPTP
+       tristate "PPtP protocol support (EXPERIMENTAL)"
+       depends on EXPERIMENTAL && NF_CONNTRACK
+       select NF_CT_PROTO_GRE
+       help
+         This module adds support for PPTP (Point to Point Tunnelling
+         Protocol, RFC2637) connection tracking and NAT.
+
+         If you are running PPTP sessions over a stateful firewall or NAT
+         box, you may want to enable this feature.
+
+         Please note that not all PPTP modes of operation are supported yet.
+         Specifically these limitations exist:
+           - Blindy assumes that control connections are always established
+             in PNS->PAC direction. This is a violation of RFC2637.
+           - Only supports a single call within each session
+
+         To compile it as a module, choose M here.  If unsure, say N.
+
 config NF_CT_NETLINK
        tristate 'Connection tracking netlink interface (EXPERIMENTAL)'
        depends on EXPERIMENTAL && NF_CONNTRACK && NETFILTER_NETLINK