* chain/table traversal for loopback packets @ 2010-05-13 18:19 Curby 2010-05-13 19:52 ` Pascal Hambourg 2010-05-13 19:53 ` Jan Engelhardt 0 siblings, 2 replies; 4+ messages in thread From: Curby @ 2010-05-13 18:19 UTC (permalink / raw) To: netfilter Hello, I'm trying to understand http://www.frozentux.net/iptables-tutorial/images/tables_traverse.jpg Would a packet created locally and sent over the loopback interface traverse the POSTROUTING and PREROUTING hooks as implied by the diagram, or does the last Routing Decision notice that it's bound for the local host and send it straight to the beginning of the INPUT hook? Thanks! --Mike ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: chain/table traversal for loopback packets 2010-05-13 18:19 chain/table traversal for loopback packets Curby @ 2010-05-13 19:52 ` Pascal Hambourg 2010-05-13 19:53 ` Jan Engelhardt 1 sibling, 0 replies; 4+ messages in thread From: Pascal Hambourg @ 2010-05-13 19:52 UTC (permalink / raw) To: Curby; +Cc: netfilter Hello, Curby a écrit : > Hello, I'm trying to understand > http://www.frozentux.net/iptables-tutorial/images/tables_traverse.jpg > > Would a packet created locally and sent over the loopback interface > traverse the POSTROUTING and PREROUTING hooks as implied by the > diagram, Yes. However be aware that the nat/PREROUTING chain is skipped even for the first packet of a new connection because at that stage the connection is already confirmed. Thus destination NAT must be performed in OUTPUT. > or does the last Routing Decision notice that it's bound for > the local host and send it straight to the beginning of the INPUT > hook? No. ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: chain/table traversal for loopback packets 2010-05-13 18:19 chain/table traversal for loopback packets Curby 2010-05-13 19:52 ` Pascal Hambourg @ 2010-05-13 19:53 ` Jan Engelhardt 2010-05-13 20:00 ` Curby 1 sibling, 1 reply; 4+ messages in thread From: Jan Engelhardt @ 2010-05-13 19:53 UTC (permalink / raw) To: Curby; +Cc: netfilter On Thursday 2010-05-13 20:19, Curby wrote: >Hello, I'm trying to understand >http://www.frozentux.net/iptables-tutorial/images/tables_traverse.jpg > >Would a packet created locally and sent over the loopback interface >traverse the POSTROUTING and PREROUTING hooks as implied by the >diagram, or does the last Routing Decision notice that it's bound for >the local host and send it straight to the beginning of the INPUT >hook? Thanks! No shortcuts. BTW, follow http://jengelh.medozas.de/images/nf-packet-flow.png ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: chain/table traversal for loopback packets 2010-05-13 19:53 ` Jan Engelhardt @ 2010-05-13 20:00 ` Curby 0 siblings, 0 replies; 4+ messages in thread From: Curby @ 2010-05-13 20:00 UTC (permalink / raw) To: netfilter Thanks, everyone! I've been able to ignore ebtables for now, but I think it may be time to familiarize myself with it. =P --Mike ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2010-05-13 20:00 UTC | newest] Thread overview: 4+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2010-05-13 18:19 chain/table traversal for loopback packets Curby 2010-05-13 19:52 ` Pascal Hambourg 2010-05-13 19:53 ` Jan Engelhardt 2010-05-13 20:00 ` Curby
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