summaryrefslogtreecommitdiffstats
path: root/net/netfilter/Makefile
diff options
context:
space:
mode:
authorPatrick McHardy <kaber@trash.net>2013-08-27 08:50:14 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2013-08-28 00:27:54 +0200
commit48b1de4c110a7afa4b85862f6c75af817db26fad (patch)
tree9d5af0462fdfda02e8eba53018f3e9e577c657f2 /net/netfilter/Makefile
parent0198230b7705eb2386e53778d944e307eef0cc71 (diff)
downloadblackbird-op-linux-48b1de4c110a7afa4b85862f6c75af817db26fad.tar.gz
blackbird-op-linux-48b1de4c110a7afa4b85862f6c75af817db26fad.zip
netfilter: add SYNPROXY core/target
Add a SYNPROXY for netfilter. The code is split into two parts, the synproxy core with common functions and an address family specific target. The SYNPROXY receives the connection request from the client, responds with a SYN/ACK containing a SYN cookie and announcing a zero window and checks whether the final ACK from the client contains a valid cookie. It then establishes a connection to the original destination and, if successful, sends a window update to the client with the window size announced by the server. Support for timestamps, SACK, window scaling and MSS options can be statically configured as target parameters if the features of the server are known. If timestamps are used, the timestamp value sent back to the client in the SYN/ACK will be different from the real timestamp of the server. In order to now break PAWS, the timestamps are translated in the direction server->client. Signed-off-by: Patrick McHardy <kaber@trash.net> Tested-by: Martin Topholm <mph@one.com> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/Makefile')
-rw-r--r--net/netfilter/Makefile3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 89a9c1658f5e..c3a0a12907f6 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -61,6 +61,9 @@ obj-$(CONFIG_NF_NAT_IRC) += nf_nat_irc.o
obj-$(CONFIG_NF_NAT_SIP) += nf_nat_sip.o
obj-$(CONFIG_NF_NAT_TFTP) += nf_nat_tftp.o
+# SYNPROXY
+obj-$(CONFIG_NETFILTER_SYNPROXY) += nf_synproxy_core.o
+
# generic X tables
obj-$(CONFIG_NETFILTER_XTABLES) += x_tables.o xt_tcpudp.o
OpenPOWER on IntegriCloud