Mostly, it works as expected, but I have weird DNS issues, where host, dig and nslookup find what I want, but applications for some DNS names report "Name or service not known" (ping), "(6) Could not resolve host" (curl) or "Hmm. We’re having trouble finding that site" (firefox).
Nslookup and dig have no problems finding the names, nor do apps on the host system.
The addresses causing issues are releases.jfrog.io and yum.puppet.com which I want yum to use as repos. Other names like www.centos.org and serverfault.com work perfectly.
Note the errors from ping below:
Code: Select all
[user@server ~]$ for i in serverfault.com releases.jfrog.io yum.puppet.com www.centos.org ; do echo " "; echo "Testing" $i; host $i; ping -c 2 $i; done
Testing serverfault.com
serverfault.com has address 151.101.65.69
serverfault.com has address 151.101.129.69
serverfault.com has address 151.101.193.69
serverfault.com has address 151.101.1.69
PING serverfault.com (151.101.193.69) 56(84) bytes of data.
64 bytes from 151.101.193.69 (151.101.193.69): icmp_seq=1 ttl=128 time=31.1 ms
64 bytes from 151.101.193.69 (151.101.193.69): icmp_seq=2 ttl=128 time=38.1 ms
--- serverfault.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 31.075/34.611/38.147/3.536 ms
Testing releases.jfrog.io
releases.jfrog.io is an alias for endpointdns-prod-use1-lb.jfrog.io.
endpointdns-prod-use1-lb.jfrog.io is an alias for a239bd5ffc31c4061881e7379b84e385-1677123289.us-east-1.elb.amazonaws.com.
a239bd5ffc31c4061881e7379b84e385-1677123289.us-east-1.elb.amazonaws.com has address 52.55.117.113
a239bd5ffc31c4061881e7379b84e385-1677123289.us-east-1.elb.amazonaws.com has address 3.222.96.9
a239bd5ffc31c4061881e7379b84e385-1677123289.us-east-1.elb.amazonaws.com has address 18.211.149.175
a239bd5ffc31c4061881e7379b84e385-1677123289.us-east-1.elb.amazonaws.com has address 23.20.194.242
a239bd5ffc31c4061881e7379b84e385-1677123289.us-east-1.elb.amazonaws.com has address 34.197.197.131
a239bd5ffc31c4061881e7379b84e385-1677123289.us-east-1.elb.amazonaws.com has address 34.200.112.168
ping: releases.jfrog.io: Name or service not known
Testing yum.puppet.com
yum.puppet.com is an alias for d1ge15oq8tiwk1.cloudfront.net.
d1ge15oq8tiwk1.cloudfront.net has address 13.224.179.115
d1ge15oq8tiwk1.cloudfront.net has address 13.224.179.39
d1ge15oq8tiwk1.cloudfront.net has address 13.224.179.61
d1ge15oq8tiwk1.cloudfront.net has address 13.224.179.63
d1ge15oq8tiwk1.cloudfront.net has IPv6 address 2600:9000:20ec:9200:3:d41c:9440:93a1
d1ge15oq8tiwk1.cloudfront.net has IPv6 address 2600:9000:20ec:bc00:3:d41c:9440:93a1
d1ge15oq8tiwk1.cloudfront.net has IPv6 address 2600:9000:20ec:f800:3:d41c:9440:93a1
d1ge15oq8tiwk1.cloudfront.net has IPv6 address 2600:9000:20ec:0:3:d41c:9440:93a1
d1ge15oq8tiwk1.cloudfront.net has IPv6 address 2600:9000:20ec:1a00:3:d41c:9440:93a1
d1ge15oq8tiwk1.cloudfront.net has IPv6 address 2600:9000:20ec:4000:3:d41c:9440:93a1
d1ge15oq8tiwk1.cloudfront.net has IPv6 address 2600:9000:20ec:6c00:3:d41c:9440:93a1
d1ge15oq8tiwk1.cloudfront.net has IPv6 address 2600:9000:20ec:6e00:3:d41c:9440:93a1
ping: yum.puppet.com: Name or service not known
Testing www.centos.org
www.centos.org has address 35.178.203.231
www.centos.org has address 81.171.33.201
www.centos.org has address 81.171.33.202
www.centos.org has IPv6 address 2001:4de0:aaae::201
www.centos.org has IPv6 address 2001:4de0:aaae::202
www.centos.org has IPv6 address 2a05:d01c:c6a:cc02:e4d3:88b0:60da:6fb4
PING www.centos.org (81.171.33.201) 56(84) bytes of data.
64 bytes from ip-81.171.33.201.centos.org (81.171.33.201): icmp_seq=1 ttl=128 time=373 ms
64 bytes from ip-81.171.33.201.centos.org (81.171.33.201): icmp_seq=2 ttl=128 time=335 ms
--- www.centos.org ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 334.686/353.943/373.200/19.257 ms
What am I missing? What should I look at?
Kind regards,
k.