Re: Re: Problem to resolv many hosts

[Tiago Oliveira de Jesus]

Hi!

Thanks for help!

I found problem... is something on my ISP..
This is a little local ISP provider, using radios to share internet, and after 
changes at few days, this problem happened.


They are investigating.

[] s

Problem to resolv many hosts

[Tiago Oliveira de Jesus]

Hi all! First, sorry my bad english..

I'm a old Debian user, and from some days, i note problem to access some sites 
(big sites!) from Brasil..


And, today, i looking better this problem, and see is occourred on DNS name 
resolution:


This tests do at fresh machine install using Debian 9:

*root@bkp2:~# host walmart.com.br*
walmart.com.br has address 177.124.108.137
walmart.com.br mail is handled by 10 mx2.walmart.com.br.
walmart.com.br mail is handled by 10 mx7.walmart.com.br.
walmart.com.br mail is handled by 1 mx1.walmart.com.br.
walmart.com.br mail is handled by 10 mx8.walmart.com.br.


*root@bkp2:~# host walmart.com.br 127.0.0.1*
Using domain server:
Name: 127.0.0.1
Address: 127.0.0.1#53
Aliases:
walmart.com.br has address 177.124.108.137
walmart.com.br mail is handled by 10 mx7.walmart.com.br.
walmart.com.br mail is handled by 1 mx1.walmart.com.br.
walmart.com.br mail is handled by 10 mx8.walmart.com.br.
walmart.com.br mail is handled by 10 mx2.walmart.com.br.


*root@bkp2:~# host walmart.com.br 8.8.8.8*
Using domain server:
Name: 8.8.8.8
Address: 8.8.8.8#53
Aliases:
walmart.com.br has address 177.124.108.137
walmart.com.br mail is handled by 10 mx2.walmart.com.br.
walmart.com.br mail is handled by 10 mx7.walmart.com.br.
walmart.com.br mail is handled by 10 mx8.walmart.com.br.
walmart.com.br mail is handled by 1 mx1.walmart.com.br.
root@bkp2:~#

All ok, but now:

*root@bkp2:~# host www.walmart.com.br*
;; connection timed out; no servers could be reached

*root@bkp2:~# host www.walmart.com.br 127.0.0.1*
Using domain server:
Name: 127.0.0.1
Address: 127.0.0.1#53
Aliases:
Host www.walmart.com.br not found: 2(SERVFAIL)

*root@bkp2:~# host www.walmart.com.br 8.8.8.8*
;; connection timed out; no servers could be reached
root@bkp2:~#

And, i'm not need say who is Walmart :-)

This same problem occourred when access www.submarino.com.br and 
www.americanas.com.br, two other big e-commerce here.


I try many things... chance my DNS server (PDNS-Recursor too Bind9), change DNS 
server, etc...


And, here at office, i see some problem on four Debian 9 upgraded daily (like my 
notebook)...



I'm stel trying find... but, if having help is better :-)

[] s

Tiago Oliveira de Jesus