<p dir="ltr">But do you see an excessive amount of SIP messages coming to your server?</p>
<div class="gmail_quote">On Jun 26, 2015 6:22 PM, "Eric Ni" <<a href="mailto:xyangni@gmail.com">xyangni@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thanks. I have tried this. But today it happen again. When I killed freeswith process and restart it, everything back to normal. So it does seem to be a DOS attack now. Or restarting fs won't make any difference. </div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Jun 13, 2015 at 1:04 AM, Stanislav Sinyagin <span dir="ltr"><<a href="mailto:ssinyagin@gmail.com" target="_blank">ssinyagin@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">here are iptables rules which do a simple rate limiting for SIP<br>
messages, probably this helps:<br>
<a href="https://txlab.wordpress.com/2013/06/29/protecting-a-vpbx-from-dos-attacks/" rel="noreferrer" target="_blank">https://txlab.wordpress.com/2013/06/29/protecting-a-vpbx-from-dos-attacks/</a><br>
<div><div><br>
<br>
<br>
On Sat, Jun 13, 2015 at 1:46 AM, Eric Ni <<a href="mailto:xyangni@gmail.com" target="_blank">xyangni@gmail.com</a>> wrote:<br>
> Hi,<br>
><br>
> I am using FreeSWITCH Version 1.4.18+git~20150312T185523Z~4eed221b69~64bit<br>
> (git 4eed221 2015-03-12 18:55:23Z 64bit) on ubuntu 14.04, Linode VPS.<br>
> It has been working fine for about 2 months. But recently it stopped working<br>
> with CPU rate above 95% for several times. SIP client got 408 timeout error.<br>
> I have to login system to kill the process and start over again. Then it<br>
> back to normal for a period. Checked the log file, it seem to be a sudden<br>
> stop. Nothing special before the stop and completely no log starting from<br>
> the issue. May I ask how I should handle this issue? Thanks.<br>
><br>
> Regards,<br>
> Eric<br>
><br>
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