netfilter buglog - Jul 2006 - [Bug 493] New: NAT still work after flush it.

https://bugzilla.netfilter.org/bugzilla/show_bug.cgi?id=493

           Summary: NAT still work after flush it.
           Product: iptables
           Version: 1.3.5
          Platform: i386
        OS/Version: RedHat Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: iptables
        AssignedTo: laforge@netfilter.org
        ReportedBy: munakaya@naver.com


<A>------<B>-------<C>


1.I put the nat entry into kernel in <B>.

iptables -t nat -A POSTROUTING -s 10.177.3.51 -d 10.177.2.51 -p udp --sport 
20000 --dport 13001 -j SNAT --to 10.177.2.34:20000 

2. Sending packet from <A> to <C>

3. Watching the packet using tcpdump in <c>, and it works. 

4. Now I want to stop nat function so I flush the nat table.(packet is still 
flowing and I am still watching the packet) 

iptables -F -t nat

5. Even if I flush nat table, the packet's soruce IP never changed.( In this
time, I erased the nat table so the packet's souce IP have not to be
effected
by nat table becase there are no nat entry.)

 But why packet's source IP never be changed to original IP?

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