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Other broadband queries

Two sites needed for work show "Server not found"

pragmaticwaffel
2: Seeker

There are 2 websites that I need to be able to access for work.
https://zabbix.essensys.tech/

https://zabbix.essensys.tech/

 

I was able to get to both of these without problem from my old ISP (Sky), and I can do the same when I use my mobile hotspot.

But when I try to get to these from Vodafone, it can't find the server.
When I do an NSLookup I get the following:

C:\Users>nslookup netbox.essensys.tech
Server:  UnKnown
Address:  fe80::d635:1dff:fe21:a6b5

*** No internal type for both IPv4 and IPv6 Addresses (A+AAAA) records available for netbox.essensys.tech

I've tried hard setting my DNS to 8.8.8.8, but it doesn't make a difference.
It doesn't seem to be a filter at router level, because I turned off all filtering on my router, and it also didn't help.

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13 REPLIES 13
Jayach
16: Advanced member

I don't think it is anything to do with Vodafone, I cant reach them at all, not even with a VPN. Also see here:

https://www.isitdownrightnow.com/zabbix.essensys.tech.html

 

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pragmaticwaffel
2: Seeker

Thanks for you reply Jayach, the websites are working, I've just logged off my voda wifi and on to my mobile hotspot. Also as mentioned it worked totally fine with my old ISP.

I presume you're using Vodafone as well? Do you get the same as me when trying to ping the address or do an nslookup?

 

In terms of the isitdown link, I'm not sureprised it returned a fail, the sites should only be accessible via my VPN with LDAP creds.

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Jayach
16: Advanced member

Yes I am on Vodafone, Unfortunately so is my phone, so I'm unable to repeat your hotspot test.

I'm unable to to get a DNS reply from net.essensys.tech but essensys.tech is fine. That is going via Nord VPN so should be totally divorced from Vodafone.

Do happen to know the IP address for the sites?

Edit: see my mistake there, I typed net instead of netbox

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WelshPaul
13: Advanced Member

Neither of those sites work for me when using my Virgin Media connection.

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Jayach
16: Advanced member

When I use nslookup I get this:

C:\Users\>nslookup netbox.essensys.tech
Server: UnKnown
Address: fe80::d635:1dff:fe04:35c

*** No internal type for both IPv4 and IPv6 Addresses (A+AAAA) records available for netbox.essensys.tech

C:\Users\>nslookup essensys.tech
Server: UnKnown
Address: fe80::d635:1dff:fe04:35c

Non-authoritative answer:
Name: essensys.tech
Address: 35.246.38.241

 

So maybe it's something to do with the fact Vodafone aren't using IPv6 and Sky are.

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Jayach
16: Advanced member

Sorry ignore the above, I was still doing it on the PC without Nord. With Nord VPN I can ping netbox.essensys.tech, but obviously can't connect to the sites with a browser.

 

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Jayach
16: Advanced member

Repeat nslookup with Nord:

C:\Users\>nslookup netbox.essensys.tech
Server: UnKnown
Address: 103.86.96.100

Non-authoritative answer:
Name: netbox.essensys.tech
Addresses: 192.168.252.46
192.168.251.71
192.168.253.41


C:\Users\>nslookup essensys.tech
Server: UnKnown
Address: 103.86.96.100

Non-authoritative answer:
Name: essensys.tech
Address: 35.246.38.241

 

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Jayach
16: Advanced member

Ping with Nord says:

C:\Users\>ping netbox.essensys.tech

Pinging netbox.essensys.tech [192.168.253.41] with 32 bytes of data:
Reply from 10.5.0.1: Destination host unreachable.
Reply from 10.5.0.1: Destination host unreachable.
Reply from 10.5.0.1: Destination host unreachable.
Reply from 10.5.0.1: Destination host unreachable.

Ping statistics for 192.168.253.41:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

 

Getting a bit beyond my expertise now. .😕

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Anonymous
Not applicable

Someone has set something on the sites up incorrectly!  Those IPv6 addresses are LOCAL addresses and not internet addresses, hence even if you have IPv6 you'll never be able to reach them at those addresses!  The IPv4 addresses listed in the last reply are also not internet addresses!

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Jayach
16: Advanced member

@KeithAlger

I thought similarly, but how does it work when they use a hotspot from their phone?

@pragmaticwaffel

Have you tried reinstalling your VPN software?

 

This is what I get using PIA instead of Nord

C:\Users\>nslookup essensys.tech
Server: 92521008769a
Address: 10.0.0.243

Non-authoritative answer:
Name: essensys.tech
Address: 35.246.38.241


C:\Users\>nslookup netbox.essensys.tech
Server: 92521008769a
Address: 10.0.0.243

Non-authoritative answer:
Name: netbox.essensys.tech
Addresses: 192.168.252.46
192.168.253.41
192.168.251.71


C:\Users\>ping netbox.essensys.tech

Pinging netbox.essensys.tech [192.168.253.41] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 192.168.253.41:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

 

 

 

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Anonymous
Not applicable

Nope they're all local addresses, it might work from a phone if you are on-site and connected to their WiFi, or if you VPN into the worksite.

So any IPv6 address that starts fe80:: is local

Any IPv4 in the range 10.0.0.0 - 10.255.255.255 is local

 

https://en.wikipedia.org/wiki/Private_network

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Jayach
16: Advanced member

@Anonymous wrote:

Nope they're all local addresses, it might work from a phone if you are on-site and connected to their WiFi, or if you VPN into the worksite.

So any IPv6 address that starts fe80:: is local

Any IPv4 in the range 10.0.0.0 - 10.255.255.255 is local

 

https://en.wikipedia.org/wiki/Private_network


Thanks I recognise IPv4 private address's but not IPv6 (yet),

The OP says he is using a VPN, which is why I suggested reinstalling it.


@pragmaticwaffel wrote:

In terms of the isitdown link, I'm not sureprised it returned a fail, the sites should only be accessible via my VPN with LDAP creds.


 

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Anonymous
Not applicable

It could well be down to the lack of native IPv6 on the Vodafone router and how the "teredo" tunnelling is implemented.  It might be necessary to manually set up the IPv6 settings on the machine being used even with the tunnel.  I guess the problem is that it could be any one of a number of things and is probably nearly impossible to diagnose remotely.

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