[cs615asa] DNS with aws public IP problem

Hongkun Zhang hzhang69 at stevens.edu
Mon Mar 19 17:32:56 EDT 2018


correct the answer  udp and icmp data.

Hongkun Zhang <hzhang69 at stevens.edu>于2018年3月19日 周一17:26写道:

> 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.
>
> Xuyang Weng <xweng at stevens.edu>于2018年3月19日 周一17:23写道:
>
>> Hi Yifang,
>>
>> I did not try private IP, but public IP works for me. Did you check the
>> firewall rules?
>>
>>
>> On Mon, Mar 19, 2018 at 5:09 PM, Yifang Yuan <yyuan17 at stevens.edu> wrote:
>>
>>> Hi All:
>>> Does anyone set client name-server to DNS server’s public IP? My client
>>> works with DNS server’s private address, but not public.
>>>
>>> Let me specific:
>>> 1 My DNS server(AWS) private ip is 172.31.33.1 and public is
>>> 51.51.51.51.
>>> 2 My DNS client(AWS)’s name-server is set to 172.31.33.1. Client could
>>> resolve domain name.
>>> 3 My DNS client(AWS)’s name-server is set to 51.51.51.51. *Client can’t
>>> resolve domain name.*
>>> 4 My Macbook’s name-server is set to 51.51.51.51. My laptop could
>>> resolve domain name.
>>>
>>> Name-sever is set in /etc/resolv.conf. I use dig to confirm the
>>> configuration is loaded.
>>> 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.
>>>
>>> Yifang
>>>
>>>
>>>
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>>>
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