Centminmod problem or network issues?

Hi

When i try to run centminmod i am getting this:

[root@server centminmod-123.08centos7beta01]# ./centmin.sh

Looking up download.fedoraproject.org
Unable to locate remote host download.fedoraproject.org.
Alert!: Unable to connect to remote host.

---

Code:

lynx: Can't access startfile http://download.fedoraproject.org/pub/epel/7/x86_64/repoview/epel-release.html

 

It seems that it tries to use ipv6 to connect

This happen after updating to latest nginx yesterday and run yum update

[root@server ~]# wget https://github.com/centminmod/centminmod/archive/123.08centos7beta01.zip
--2014-12-26 01:29:03-- https://github.com/centminmod/centminmod/archive/123.08centos7beta01.zip
Resolving github.com... failed: Temporary failure in name resolution.
wget: unable to resolve host address “github.com”


Yes ipv6 is the problem

Using wget -4 https://github.com/centminmod/centminmod/archive/123.08centos7beta01.zip

it works !!!!

Any ideas how can i fix it?

 

I found also this on hosts file:

::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

and on nameservers i got a line:

search ip-37-187-151.eu

and i remove both so now i have:

/etc/hosts:

127.0.0.1 localhost localhost.localdomain
37.187.xxx.xx server.mydomain.com server

/etc/sysconfig/network:

NETWORKING=yes
HOSTNAME=server.mydomain.com
GATEWAY=37.187.xxx.xxx


/etc/resolv.conf
# Generated by NetworkManager
nameserver 8.8.8.8

And then reboot the server but nothing

also i have this:

/etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"
BOOTPROTO="static"
DNS1="8.8.8.8"
GATEWAY="37.187.xxx.254"
HWADDR="0C:C4:7A:02:CA:xx"
IPADDR="37.187.xxx.xx"
NETMASK="255.255.255.0"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Ethernet"
UUID="cb7ea12f-2ab7-45a1-896f-8ff948d7xxxx"

and this:

/etc/nsswitch.conf

passwd: files
shadow: files
group: files

#hosts: db files nisplus nis dns
hosts: files dns

bootparams: nisplus [NOTFOUND=return] files

ethers: files
netmasks: files
networks: files
protocols: files
rpc: files
services: files

netgroup: nisplus

publickey: nisplus

automount: files nisplus
aliases: files nisplus


I also try to disable firewall running csfstop ....

 

[root@server ~]# nslookup google.com
Server: 8.8.8.8
Address: 8.8.8.8#53

Non-authoritative answer:
Name: google.com
Address: 173.194.40.142
Name: google.com
Address: 173.194.40.130
Name: google.com
Address: 173.194.40.135
Name: google.com
Address: 173.194.40.132
Name: google.com
Address: 173.194.40.131
Name: google.com
Address: 173.194.40.128
Name: google.com
Address: 173.194.40.134
Name: google.com
Address: 173.194.40.129
Name: google.com
Address: 173.194.40.137
Name: google.com
Address: 173.194.40.133
Name: google.com
Address: 173.194.40.136


and:

dig @8.8.8.8 Google

[root@server ~]# dig @8.8.8.8 Google

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.30.rc1.el6_6.1 <<>> @8.8.8.8 Google
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached


and:

[root@server ~]# ping6 mirrors.fedoraproject.org
PING mirrors.fedoraproject.org(2001:4178:2:1269::fed2) 56 data bytes
From fe80::2ff:ffff:feff:fffe icmp_seq=25 Destination unreachable: Beyond scope of source address

 

For me:

[root@server ~]# ping6 -c4 mirrors.fedoraproject.org
unknown host

I am sure that this happen after running the centminmod nginx upgrade and select yes to run yum update first ....

There is a problem 100% as maybe fedora mirrors has a problem but i have a problem also with github:

[root@server ~]# wget https://github.com/centminmod/centminmod/archive/123.08centos7beta01.zip
--2014-12-26 01:29:03-- https://github.com/centminmod/centminmod/archive/123.08centos7beta01.zip
Resolving github.com... failed: Temporary failure in name resolution.
wget: unable to resolve host address “github.com”

On a second Centminmod server the ipv6 is enabled (default) as i never edit any related info and all the above commands are working.....

On both servers i have the same output for ipv6:

[root@server ~]# lsmod | grep ipv6
nf_conntrack_ipv6 8337 67
nf_defrag_ipv6 27236 1 nf_conntrack_ipv6
nf_conntrack 80390 8 nf_conntrack_ipv6,xt_state,nf_nat_ftp,iptable_nat,nf_nat,nf_conntrack_ipv4,xt_conntrack,nf_conntrack_ftp
ipv6 334740 42 nf_conntrack_ipv6,nf_defrag_ipv6

Any help please?

 

Yes it seems like a dns problem but i have the 8.8.8.8 from google that i use also on my second Centminmod server without any issues...


[root@server ~]# host github.com
github.com has address 192.30.252.131
;; connection timed out; trying next origin
;; connection timed out; no servers could be reached
You have new mail in /var/spool/mail/root

[root@server ~]# host mirrors.fedoraproject.org
mirrors.fedoraproject.org is an alias for wildcard.fedoraproject.org.
wildcard.fedoraproject.org has address 85.236.55.6
wildcard.fedoraproject.org has address 209.132.181.16
wildcard.fedoraproject.org has address 213.175.193.206
wildcard.fedoraproject.org has address 152.19.134.146
;; connection timed out; trying next origin
;; connection timed out; no servers could be reached

[root@server ~]# host google.com
;; connection timed out; trying next origin
;; connection timed out; no servers could be reached


Downloading of Centminmod using:

Code:

wget -4 https://github.com/centminmod/centminmod/archive/123.08centos7beta01.zip

is working great that's why i am thinking that the problem is related to ipv6 (maybe default now?)...

If you read my third post here you will see that something is activate ipv6 and some related settings to it

Also i just notice that my second domain that i have on my Centminmod server that is redirecting to an internal folder of my first domain using http://www/seconddomain.com is not opening anymore....

First domain is working (i just get a few double topics/posts)... from users

I am sure that it is a global problem and not related to yum or wget .....

 

Anyone that can help please?

[root@server ~]# wget https://github.com/centminmod/centminmod/archive/123.08centos7beta01.zip
--2014-12-27 13:19:25-- https://github.com/centminmod/centminmod/archive/123.08centos7beta01.zip
Resolving github.com... failed: Temporary failure in name resolution.
wget: unable to resolve host address “github.com”

 

ok but no idea how as i can ping my dns server and i use as nameservers the google one 8.8.8.8 that is ok ....

I also try 8.8.4.4 and open dns but nothing....

 

Ok does anyone know any good system admin to hire? Low budget

 

Problem solved
I was have dns problem, because my resolvers have no udp connection (filtred/banned)

Is csf do that? Do i need to adjust anything related?

Is there any command to clear all related blocks at csf or iptables?

How can i know if the block is from my datacenter or google servers?