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List:       kde-bugs-dist
Subject:    [Bug 141483] ktorrent uses 95% of the CPU
From:       Jakub Suder <jakub.suder () gmail ! com>
Date:       2007-03-20 20:22:57
Message-ID: 20070320202257.14816.qmail () ktown ! kde ! org
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http://bugs.kde.org/show_bug.cgi?id=141483         




------- Additional Comments From jakub.suder gmail com  2007-03-20 21:22 -------
Hmm... that's strange...

I forgot to tell you that I'm behind a NAT :) I have port forwarding on my server, so \
tcp & udp ports 6881 on the server are forwarded to tcp & udp ports 6881 on my \
computer. Now, when I run ethereal on the server on the external eth, I get only \
about 20 pings per second (from various addresses). But when I run it on the internal \
eth, I get about 500 per second. So it seems that all those bad pings come from my \
server... I'm not sure what to think about this, but can there be some feedback loop \
which causes ktorrent on my computer to reply to pings that come from itself?... And \
if it's all because of some error in my configuration, then why this only happens \
after some time, not immediately after ktorrent's start?

Oh, and I don't have any bittorrent clients or servers on the router computer (I \
think).

---

I don't know if this matters but here are parts of my firewall file which are \
relevant to the forwarding (I use a firewall generated by this script: \
http://easyfwgen.morizot.net/gen/):

$IPT -A udp_inbound -p UDP -s 0/0 --destination-port 6881 -j ACCEPT
$IPT -A tcp_inbound -p TCP -s 0/0 --destination-port 6881 -j ACCEPT

$IPT -A FORWARD -p tcp -i $INET_IFACE --destination-port 6881 --destination 10.1.1.21 \
-j ACCEPT $IPT -A FORWARD -p udp -i $INET_IFACE --destination-port 6881 --destination \
10.1.1.21 -j ACCEPT

$IPT -t nat -A PREROUTING -p tcp -i $INET_IFACE --destination-port 6881 \
     -j DNAT --to-destination 10.1.1.21
$IPT -t nat -A PREROUTING -p tcp -i $LOCAL_IFACE --destination-port 6881 \
     --destination $INET_ADDRESS -j DNAT --to-destination 10.1.1.21
$IPT -t nat -A PREROUTING -p udp -i $INET_IFACE --destination-port 6881 \
     -j DNAT --to-destination 10.1.1.21
$IPT -t nat -A PREROUTING -p udp -i $LOCAL_IFACE --destination-port 6881 \
     --destination $INET_ADDRESS -j DNAT --to-destination 10.1.1.21

I don't have any firewall on the desktop computer (I don't need one, at least in \
Linux, as I have a firewall on the server...).


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