<div><div dir="auto">correct the answer udp and icmp data.</div><br><div class="gmail_quote"><div>Hongkun Zhang <<a href="mailto:hzhang69@stevens.edu">hzhang69@stevens.edu</a>>于2018年3月19日 周一17:26写道：<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div dir="auto">Maybe the security group in ec2 block the ups and icmp data. If so, you need add the ups and icmp rules to your security group.</div><br><div class="gmail_quote"><div>Xuyang Weng <<a href="mailto:xweng@stevens.edu" target="_blank">xweng@stevens.edu</a>>于2018年3月19日 周一17:23写道：<br></div></div></div><div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>Hi Yifang,<div><br><div>I did not try private IP, but public IP works for me. Did you check the firewall rules?</div></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Mar 19, 2018 at 5:09 PM, Yifang Yuan <span><<a href="mailto:yyuan17@stevens.edu" target="_blank">yyuan17@stevens.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space">Hi All:<div>Does anyone set client name-server to DNS server’s public IP? My client works with DNS server’s private address, but not public.</div><div><br></div><div>Let me specific:</div><div>1 My DNS server(AWS) private ip is 172.31.33.1 and public is 51.51.51.51. </div><div>2 My DNS client(AWS)’s name-server is set to 172.31.33.1. Client could resolve domain name.</div><div>3 My DNS client(AWS)’s name-server is set to 51.51.51.51. <u><b>Client can’t resolve domain name.</b></u></div><div>4 My Macbook’s name-server is set to 51.51.51.51. My laptop could resolve domain name.</div><div><br></div><div>Name-sever is set in /etc/resolv.conf. I use dig to confirm the configuration is loaded.</div><div>Because the dns public ip works on my laptop, I suppose AWS limit the access from inside to themselves public address. Is it true? Thank you.</div><span class="m_5654339708107548823m_1313495807644883237HOEnZb"><font color="#888888"><div><br></div><div>Yifang</div><div><br><div><br></div></div></font></span></div><br>_______________________________________________<br>
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