lynx nonexistant.tld redirects to Plesk Default Page????

[UweP]

Hi. I have installed a link checker on my wordpress installation. This link checker though, doesnt find some links as broken because somehow requests to for example http://nonexistant.tld get somehow redirected or reach somehow a plesk default page the author of the link checker plugin says to the plugin it seems like it successfully connected to http://nonexistant.tld (no redirect). Any idea what could be causing this?

 

[UFHH01]

Hi UweP,

please make it easier for us to understand your issue: Link to the wordpress plugin - page and include log - files for investigations, because we can only guess what happens on your server, which is a bad idea for investigations. An explanation like "it seems like" will only lead to guessing and not to investigaitions to solve your issue.

 

[UweP]

https://wordpress.org/plugins/broken-link-checker/ <-- wordpress plugin. what log files do u need? the same happens also with lynx http://nonexistant.tld from within a shell from the server.

 

[UweP]

and i dont understand how it happens or why.

 

[UweP]

also a ping nonexistant.tld gives me:
PING nonexistant.tld.freakyonline.de (176.9.83.139) 56(84) bytes of data.
64 bytes from baby.freakyonline.de (176.9.83.139): icmp_req=1 ttl=64 time=0.017 ms
64 bytes from baby.freakyonline.de (176.9.83.139): icmp_req=2 ttl=64 time=0.019 ms
64 bytes from baby.freakyonline.de (176.9.83.139): icmp_req=3 ttl=64 time=0.025 ms
64 bytes from baby.freakyonline.de (176.9.83.139): icmp_req=4 ttl=64 time=0.024 ms

 

[UweP]

host nonexistant.tld
Host nonexistant.tld not found: 3(NXDOMAIN)

 

[UFHH01]

PING nonexistant.tld.freakyonline.de (176.9.83.139) 56(84) bytes of data.

Please don't try to ping a subdomain, configured as "nonexistant.tld.freakyonline.de", because the result will always redirect to the main - domain "freakyonline.de" ( 176.9.83.139 ) due to the case that the reverse DNS is set as "freakyonline.de. A 86400 176.9.83.139". You current DNS setting at your provider Hetzner is your primary nameserver and a ping to anything with "freakyonline.de" will therefore be redirected to your server named as "baby.freakyonline.de" with the IP "176.9.83.139".

You already contacted the author of the plugin ( https://wordpress.org/support/topic/not-finding-a-fake-broken-link ) and gave him FTP and WP-Admin - access - so he will investigate the issue for you.


Please be aware that this forum is related to PLESK issues/problems/solutions/suggestions.

 

[UweP]

he already investigated and told me about the plesk page showing. the problem is this:
root@baby ~ # ping nonexistant.tld
PING nonexistant.tld.freakyonline.de (176.9.83.139) 56(84) bytes of data.
64 bytes from baby.freakyonline.de (176.9.83.139): icmp_req=1 ttl=64 time=0.015 ms
64 bytes from baby.freakyonline.de (176.9.83.139): icmp_req=2 ttl=64 time=0.021 ms
64 bytes from baby.freakyonline.de (176.9.83.139): icmp_req=3 ttl=64 time=0.026 ms

as u can see i didnt ping the subdomain of my domain, but instead it somehow reached baby.freakyonline.de and i have no idea how or why. maybe it's not plesk related but i thought maybe someone could help me.

 

[UFHH01]

Hi UweP,

how did you configure your resolv.conf ( etc/resolv.conf ) from bind ( nameserver ) on your server?

 

[UweP]

resolv.conf:
### Hetzner Online AG installimage
# nameserver config
nameserver 213.133.100.100
nameserver 213.133.98.98
nameserver 213.133.99.99

I didn't configure anything bind (nameserver) as i dont use it. i use the nameservers from my hosting provider.

 

[UweP]

though the nameserver runs. but i just stopped it tried it again and it's still doing the same. but i use different nameservers. none of the resolv.conf entries point to my server.

 

[UFHH01]

Hi UweP,

could you please post your /etc/hosts - file, to see, if there are any misconfiguration(s)?

The program "ping" uses the locally configured adresses in your host - file, while "host" and "nslookup" for example use nameservers. If you use "ping" on your own server, it will redirect you to 127.0.0.1, or the additional configured adresses. Non - existent domains, which can't be resolved through a nameserver, will be redirected to your local IP and its depending ipv4 and ipv6 adresses.


Your plugin should find the non - existent link to "http://www.nonexistant.tld/", because this link goes into the nirwana, while "http://w-shadow.com/no-such-page-here/" is an existing link.
The link "...tutorials/nonexistant" is being redirected by wordpress to the wordperss - 404 - error - page, because your worpress - settings are set this way for 404 - pages.
I don't get redirected to any "Plesk default page" at all.

 

[UweP]

### Hetzner Online AG installimage
# nameserver config
# IPv4
127.0.0.1 localhost
#
# IPv6
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
176.9.83.139 baby.freakyonline.de baby

 

[UweP]

No. Only the server itself finds the plesk page when trying to reach nonexistant urls.

 

[UFHH01]

# IPv4
127.0.0.1 localhost
#

The correct usage is:

127.0.0.1    localhost.localdomain    localhost

You could as well uncomment the IPv6 - parts, if you don't use IPv6 on your server.

Apart from that, some reviews from "https://wordpress.org/support/view/plugin-reviews/broken-link-checker" point to issues/problems as described and complain as well about enormous MySQL - queries and high server loads while using this plugin.


The plugin seems to use the "-L" - option, when checking an URL, which means, that it allows curl to follow a link with the http status code 302 ( moved temporarily ), instead of stopping the request and answering with a false positive.

 

[UweP]

ok thank you ... I will continue to try to fix this