Re: Weird nat/conntrack Problem with PASV FTP upload

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Thomas Bätzler wrote:
Patrick McHardy wrote:
I guess you're seeing INVALID packets (from the view of conntrack)
and they're thus not NATed but delivered locally, causing a RST.
Does dropping -m state --state INVALID packets in PREROUTING make
any difference?

I've tried that for a day, to no avail:
..
My nat rules currently look like this:

iptables -t nat -A PREROUTING -m state --state INVALID -j LOG
iptables -t nat -A PREROUTING -m state --state INVALID -j DROP

These rules need to go in mangle, that nat table is only
traversed for the first packet of a connection.
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