<div dir="ltr"><div><div><div>Albert,<br><br></div>Can you please share your iptables/nftables rule base configs with us. That might help to determine what the problem is here.<br><br></div>David Sussens.<br></div> <br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Apr 10, 2018 at 10:18 PM, Albert Whale <span dir="ltr"><<a href="mailto:Albert.Whale@it-security-inc.com" target="_blank">Albert.Whale@it-security-inc.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>Can someone please tell me why the connecting to HTTPS websites
are problematic when using the nfqueue run mode? This doesn't
happen when I am using af-packet mode.</p>
<p>In fact in nfqueue mode, I also get the following alerts from
fast.log:</p>
<p>04/10/2018-13:05:49.504292 [**] [1:2210007:2] ITS Safe STREAM
3way handshake SYNACK with wrong ack [**] [Classification: Generic
Protocol Command Decode] [Priority: 3] {TCP} <a href="http://17.249.105.246:443" target="_blank">17.249.105.246:443</a>
-> <a href="http://192.168.1.180:61378" target="_blank">192.168.1.180:61378</a><br>
04/10/2018-13:05:50.534691 [**] [1:2210007:2] ITS Safe STREAM
3way handshake SYNACK with wrong ack [**] [Classification: Generic
Protocol Command Decode] [Priority: 3] {TCP} <a href="http://17.249.105.246:443" target="_blank">17.249.105.246:443</a>
-> <a href="http://192.168.1.180:61378" target="_blank">192.168.1.180:61378</a><br>
04/10/2018-13:05:51.570889 [**] [1:2210007:2] ITS Safe STREAM
3way handshake SYNACK with wrong ack [**] [Classification: Generic
Protocol Command Decode] [Priority: 3] {TCP} <a href="http://17.249.105.246:443" target="_blank">17.249.105.246:443</a>
-> <a href="http://192.168.1.180:61378" target="_blank">192.168.1.180:61378</a><br>
04/10/2018-13:05:53.632130 [**] [1:2210007:2] ITS Safe STREAM
3way handshake SYNACK with wrong ack [**] [Classification: Generic
Protocol Command Decode] [Priority: 3] {TCP} <a href="http://17.249.105.246:443" target="_blank">17.249.105.246:443</a>
-> <a href="http://192.168.1.180:61378" target="_blank">192.168.1.180:61378</a></p>
<p><br>
</p>
<p>This is the error displayed in safari when I am running in-line
IPS mode:</p>
<p><img src="cid:part1.0A2A2152.055A361C@IT-Security-inc.com" alt=""></p>
<p>Any ideas or suggestions?<span class="HOEnZb"><font color="#888888"><br>
</font></span></p><span class="HOEnZb"><font color="#888888">
<div class="m_-2277878293308104038moz-signature">-- <br>
--<br>
<br>
Albert E. Whale, CEH CHS CISA CISSP<br>
Phone: 412-515-3010 | Email: <a class="m_-2277878293308104038moz-txt-link-abbreviated" href="mailto:Albert.Whale@IT-Security-inc.com" target="_blank">Albert.Whale@IT-Security-inc.<wbr>com</a><br>
Cell: 412-889-6870<br>
<br>
</div>
</font></span></div>
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