On 26 Oct 2012 09:27, "Leonidas Spyropoulos" <artafinde@xxxxxxxxx> wrote: > > On Thu, Oct 25, 2012 at 11:31 PM, Alexandre Ferrando <alferpal@xxxxxxxxx> wrote: > > On 25 October 2012 23:03, Figue <ffigue@xxxxxxxxx> wrote: > >> I've a similar issue like you with Deluge. A post that describes what I see > >> in my /var/log: > >> https://bbs.archlinux.org/viewtopic.php?id=123807 > >> > >> |[...] > >> TCP: Possible SYN flooding on port 53126. Dropping request| > >> [...] > >> > > > > I don't have any messages like that on my logs. > > > > > >> > >> A workaround in this case it's disabling SYN flood protection in the kernel, > >> adding to /etc/sysctl.conf > >> net.ipv4.tcp_syncookies=0 > > > > That doesn't help. I'm starting to think this is ISP related. > > Universities networks often block torrent protocol on the proxy level. > Also recently (last 2 years) with all that fuzz on torrents and > piracy, ISPs usually sniff package traffic and throttle torrents also. > Alternative ways have been proposed, search if your ISP is blocking > the torrents and what you could do to work around it. > > -- > Caution: breathing may be hazardous to your health. > > #include <stdio.h> > int main(){printf("%s","\x4c\x65\x6f\x6e\x69\x64\x61\x73");} I'll have to ask to my ISP and to the university about it, as it does not happen on all trackers. Thank you all for your help and sorry for the noise