On 19/04/2021 03:18, Jack Craig wrote:
On Fri, Apr 16, 2021 at 12:52 PM Doug H. <fedoraproject.org(a)wombatz.com
<mailto:fedoraproject.org@wombatz.com>> wrote:
On Fri, Apr 16, 2021, at 10:56 AM, Ed Greshko wrote:
> On 16/04/2021 17:19, Ed Greshko wrote:
> > On 16/04/2021 10:35, Jack Craig wrote:
> >> First I get my static IP from AT&T actually a block of eight
addresses of which only the first do they agree to pass through.
> >>
> >
> > BTW, if you are hosting the DNS server and if your DNS server has the IP
address of 108.220.213.121 then
> > this could be a problem.
*
*
*would you expand on this comment? i think this is an issue,... thx..*
You removed the most important part of my comment. Which was....
PORT STATE SERVICE VERSION
53/udp closed domain
53/tcp closed domain
This mean you don't have a DNS server (bind, I assume) listening on the standard port
53
on the 108.220.213.121 interface. That means that no system outside of your internals
(10.0.0.x)
can query your DNS server.
If I "telnet" to port 53 (tcp) to my ISP's name server...
[egreshko@meimei ~]$ telnet 168.95.1.1 53
Trying 168.95.1.1...
Connected to 168.95.1.1.
Escape character is '^]'.
^]
telnet> close
Connection closed.
Yours?
[egreshko@meimei ~]$ telnet 108.220.213.121 53
Trying 108.220.213.121...
telnet: connect to address 108.220.213.121: Connection refused
Also note, that if I run "nmap -A -T4 -p53 168.95.1.1 53" I get
PORT STATE SERVICE VERSION
53/tcp open domain (generic dns response: NOTIMP)
| fingerprint-strings:
| DNSVersionBindReqTCP:
| version
|_ bind
Or if I run "nmap -A -T4 -p53 -sU 168.95.1.1" a UDP scan
PORT STATE SERVICE VERSION
53/udp open domain (generic dns response: NOTIMP)
|_dns-recursion: Recursion appears to be enabled
| fingerprint-strings:
| DNSVersionBindReq:
| version
| bind
| NBTStat:
| CKAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
|_ root-servers
These nmap command need to be run from the outside. I think there are websites which
allow
you to run nmap against your own systems.
--
Remind me to ignore comments which aren't germane to the thread.