[OpenWrt-Tickets] [OpenWrt] #2558: iptables rules doesnt work after some time

[OpenWrt]

#2558: iptables rules doesnt work after some time
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 Reporter:  mangel at gmx.de  |        Owner:  developers   
     Type:  defect         |       Status:  new          
 Priority:  high           |    Milestone:  Kamikaze 7.09
Component:  base system    |   Resolution:               
 Keywords:                 |  
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Comment(by kthaa at yahoo.com):

 I've noticed that destination port numbers are altered somewhere between
 prerouting_wan and forwarding_wan when using DNAT.
 In my case, I had a rule mapping external port 80 to local 80 (tcp dpt:80
 to:192.168.7.10:80). The DPT was correct during prerouting_wan (80) and
 got translated to 85 (!!!) when forwarding_wan rules were interpreted.
 Funny thing, adding the rule: tcp dpt:80 to:192.168.7.10:75 got my www
 mapping working again (sure, my local www was still running on 80).

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Ticket URL: <https://dev.openwrt.org/cgi-bin/trac.fcgi/ticket/2558#comment:13>
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