[re-reposting without bogus headers that vger dislikes] This is a repost of a patch-series posted by Hannes Eder last Steptember. This is v2 of the patch series and I don't see any outstanding objections to it in the mailing list archives. I would like it considered for inclusion in the nf-next-2.6 kernel tree and iptables. The original cover-email from Hannes follows. The diffstat output has been updated to reflect minor up-porting by me. From: Hannes Eder <heder@xxxxxxxxxx> The following series implements full NAT support for IPVS. The approach is via a minimal change to IPVS (make friends with nf_conntrack) and adding a netfilter matcher, kernel- and user-space part, i.e. xt_ipvs and libxt_ipvs. Example usage: % ipvsadm -A -t 192.168.100.30:80 -s rr % ipvsadm -a -t 192.168.100.30:80 -r 192.168.10.20:80 -m # ... # Source NAT for VIP 192.168.100.30:80 % iptables -t nat -A POSTROUTING -m ipvs --vaddr 192.168.100.30/32 \ > --vport 80 -j SNAT --to-source 192.168.10.10 or SNAT-ing only a specific real server: % iptables -t nat -A POSTROUTING --dst 192.168.11.20 \ > -m ipvs --vaddr 192.168.100.30/32 -j SNAT --to-source 192.168.10.10 First of all, thanks for all the feedback. This is the changelog for v2: - Make ip_vs_ftp work again. Setup nf_conntrack expectations for related data connections (based on Julian's patch see http://www.ssi.bg/~ja/nfct/) and let nf_conntrack/nf_nat do the packet mangling and the TCP sequence adjusting. This change rises the question how to deal with ip_vs_sync? Does it work together with conntrackd? Wild idea: what about getting rid of ip_vs_sync and piggy packing all on nf_conntrack and use conntrackd? Any comments on this? - xt_ipvs: add new rule '--vportctl port' to match the VIP port of the controlling connection, e.g. port 21 for FTP. Can be used to match a related data connection for FTP: # SNAT FTP control connection % iptables -t nat -A POSTROUTING -m ipvs --vaddr 192.168.100.30/32 \ > --vport 21 -j SNAT --to-source 192.168.10.10 # SNAT FTP passive data connection % iptables -t nat -A POSTROUTING -m ipvs --vaddr 192.168.100.30/32 \ > --vportctl 21 -j SNAT --to-source 192.168.10.10 - xt_ipvs: use 'par->family' instead of 'skb->protocol' - xt_ipvs: add ipvs_mt_check and restrict to NFPROTO_IPV4 and NFPROTO_IPV6 - Call nf_conntrack_alter_reply(), so helper lookup is performed based on the changed tuple. Changes to the linux kernel (rebased to next-20090925): Hannes Eder (3): netfilter: xt_ipvs (netfilter matcher for IPVS) IPVS: make friends with nf_conntrack IPVS: make FTP work with full NAT support include/linux/netfilter/xt_ipvs.h | 25 +++++ include/net/ip_vs.h | 2 net/netfilter/Kconfig | 9 ++ net/netfilter/Makefile | 1 net/netfilter/ipvs/Kconfig | 4 - net/netfilter/ipvs/ip_vs_app.c | 43 --------- net/netfilter/ipvs/ip_vs_core.c | 37 ------- net/netfilter/ipvs/ip_vs_ftp.c | 178 ++++++++++++++++++++++++++++++++--- net/netfilter/ipvs/ip_vs_proto.c | 1 net/netfilter/ipvs/ip_vs_xmit.c | 30 ++++++ net/netfilter/xt_ipvs.c | 187 +++++++++++++++++++++++++++++++++++++ 11 files changed, 418 insertions(+), 99 deletions(-) create mode 100644 include/linux/netfilter/xt_ipvs.h create mode 100644 net/netfilter/xt_ipvs.c Changes to iptables (relative to 1.4.5): Hannes Eder (1): libxt_ipvs: user-space lib for netfilter matcher xt_ipvs configure.ac | 10 1 extensions/libxt_ipvs.c | 365 +++++++++++++++++++++++++++++++++++++ extensions/libxt_ipvs.man | 24 ++ include/linux/netfilter/xt_ipvs.h | 25 +++ 4 files changed, 422 insertions(+), 2 deletions(-) create mode 100644 extensions/libxt_ipvs.c create mode 100644 extensions/libxt_ipvs.man create mode 100644 include/linux/netfilter/xt_ipvs.h -- To unsubscribe from this list: send the line "unsubscribe lvs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
