I have a internet router with 3 adapters as below (with ip 172.18.0.1 in internal network):
And dns lookup is active and running normally using dnslookup www.baidu.com
And there is another router named company router with 4 adpaters as below (ip 172.18.0.2 and internel ip 172.16.0.0/16)
And I have set the dns server to 172.18.0.1 using webui with url https//172.16.0.1:444/cgi-bin/pakfire.cgi
Howerver, I can not use dnslookup in terminal, howerver, when I specifically using 172.18.0.1 as dns server, I can get the ip of specified domain, thatās why?
nslookup www.baidu.com
;; Got SERVFAIL reply from 127.0.0.1
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find www.baidu.com: SERVFAIL
nslookup www.baidu.com 172.18.0.1
# get ip result successfully
And how can i solve this. And I even can not use pakfire update in company router. And pakfire update is working normally in internet router:
Sorry, I donāt understand it. Do you mean I should use ā172.16.0.1ā as the DNS server for company router? I use quotes here just for highlight the url.
Yes.
Iām assuming your company router is behind the first IPfire.
So if the first IPfire green is 172.16.0.0/24
And your company router red is connected there.
And Iām wondering why internet routerās dns resolve is running normally. However, the company routerās dns resolve is running failure. And I have set the dns server of company router to 172.18.0.1 (which is the IP of company router).
Well lets first examine the entries of Network=>Domain Name System Page in both internet and company routers.
The internet router should have at least one DNS entry that is the isp. Check the box and save if it is not there. Also you should have at least one public DNS as a redundant.
On the office network, it should have the 172.18.0.1 as one of the DNS servers, and a public dns address.
Next is green networkās configuration on the internet router:
On the Networ+>DHCP Server page:
Primary DNS should be greenās address (172.18.0.1)
Secondary DNS should be a public DNS (like 8.8.8.8 or 1.1.1.1 or 9.9.9.9 for example)
Iām sorry for missing lookup data because new user can only upload one image for one post. So I can only reply you in multiple post.
I have checked that
on the company router, I have set 172.18.0.1 as the DN server, but there is no public dns address.
on the internet router, the primary DNS on green networkās configuration on the internet router is set to 172.18.0.1. And I have not set the secondary DNS.
When I start internet and company routers. The DNS of respective router are as below:
After I restart unbound in company router using /etc/init.d/unbound restart and wait a moment, then nslookup can work successfully in both internet router and company router, thatās why?
Iām sure that my roterās virtual nics set up right. My question is that why my DNS serversā status is broken, but I can still use nslookup www.baidu.com successfully after using /etc/init.d/unbound restart?
There is no DNS server configured! DHCP of your internet access ( the VM?) sends 10.0.2.3 (where is this?) as DNS server, but for your internet router ISP assigned servers are not activated in the config.
My question is above. When status of DNS Servers is broken, the internet router can still use nslookup normally after using /etc/init.d/unbound restart
But when I poweroff the internet router and start internet router again, nslookup can not work normally, but after restart /etc/init.d/unbound, nslookup work normally!!
Iām late to the party.
On the internet router, it is running in recursor mode as it couldnāt find a working DNS server.
The company router looks like it thinks it is failing because 172.18.0.1 is doing a reverse lookup to nothing. What happens if you add a DNS entry on the company router for 172.18.0.1?
172.18.0.1 is the ip address of internet router. My question is why internet routerās nslookup can not running normally before running /etc/init.d/unbound restart. And after running /etc/init.d/unbound restart, nslookup can works fine.
