Changli Gao wrote: > On Thu, May 20, 2010 at 10:11 PM, Patrick McHardy <kaber@xxxxxxxxx> wrote: >> Changli Gao wrote: >>> I have implemented a simple SYNPROXY iptables target. It is much like >>> the SYNPROXY implementation in pf of OpenBSD, but won't have state >>> until the first connection is established with the help of syncookies. >>> The code is hosted at github: >>> >>> http://github.com/xiaosuo/xiaosuo/tree/master/synproxy/ >>> >>> Currently, it can work with firewall and local socket. >>> >>> It is in the very early stage, and ugly. And I will add --timeout >>> parameter to this target as TCP_DFER_ACCEPT, so I can do NAT basing on >>> the request data. >>> >>> i.e. >>> >>> iptables -t nat -A OUTPUT -p tcp -m synproxy --http-url "*.jpg" -j >>> DNAT --to-destination $image_http_server:80 >>> >>> And is there any chance to merge it into mainline? >> If you can state a good use case, sure. I don't know much about the >> PF synproxy myself. >> > > pure synproxy can be used on firewall to protect the internal servers, > which don't support neither syncookies and synproxy, from the attack > of SYN-flood. > > synproxy with defered connection relay acts as a layer 7 proxy, but > works in kernel space totally, unlike tcp splice tech., which needs > the applications in user space parse the requests, and establish the > connections. I can't say much before seeing any code, but no general objections from my side. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
