<div dir="ltr"><br><br><div class="gmail_quote">On Wed, May 27, 2009 at 9:41 AM, Aviv Greenberg <span dir="ltr"><<a href="mailto:avivgnet@gmail.com">avivgnet@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
If you ping another destination during the "hang" - does it work?</blockquote><div>a download i started before the ping continues even after the ping is dead <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
If you ifdown and ifup the interfaces (wan + lan) on the router after<br>
a hang - is it released?<br>
an icmp packet is short so i don't think this is the case but: what is<br>
the MTU on the lan/wan?</blockquote><div>as you said, the ping packets are smaller then the mtu (and all are same size)<br>also ping is connectionless, so it makes sense if the lost packets are spread randomly <br>but not if in the beginning all pass and in the end all fail<br>
</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
<br>
Also, use a tool like mtr<br>
<a href="http://en.wikipedia.org/wiki/Mtr_%28My_traceroute%29" target="_blank">http://en.wikipedia.org/wiki/Mtr_(My_traceroute)</a> to detect any packet<br>
loss along the route.</blockquote><div>mtr works from both router and lan<br>there is some packet lost on the closer servers, but none at the target<br>but it is the same for both router and lan. <br><br></div><div>thanks,<br>
erez. <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
<br>
2009/5/27 Erez D <<a href="mailto:erez0001@gmail.com">erez0001@gmail.com</a>>:<br>
<div><div></div><div class="h5">> hi<br>
><br>
> i have an openwrt (linux) router, with regular firewall rules (nat,<br>
> related+established,clamp-mss-to-pmtu, etc).<br>
><br>
> if i ping from the router to the internet, it works ok<br>
> however if i ping from inside my lan to the internet, the first 30-70 pings<br>
> works, then it stops working (i.e. 100% packet lost after the first 30-70)<br>
> using tcpdump inside my router shows the icmps going through the wan<br>
> interface but none come back.<br>
><br>
> any idea ?<br>
> erez.<br>
><br>
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