Tagged Questions

-1
votes
2answers
146 views

Is there an IP v4 address that can never be assigned? [closed]

I am aware of the difference between public and private ipv4 address space. My question is, is there a valid (in terms of DNS) IP address which will never be resolved by definition? localhost or ...
4
votes
2answers
105 views

Empty AAAA DNS Record with long TTL?

I pay for a DNS service based on queries per second. We are not using IPv6, but a large number of queries (that I pay for) are coming in for AAAA records. I understand that most DNS stacks will now ...
3
votes
2answers
166 views

Protocol (or service publish/discovery) to detect devices in network

we connect some embedded devices in a network. What i am looking for now, is a way to find the devices IP and identify them. We work with Windows PC´s and i am about to write a C# tool that should do ...
0
votes
2answers
98 views

IP address in production server suddenly conked-out

Here's the situation: my company runs a website, but we don't have anybody in-house qualified to be a sysadmin, so when something goes awry, we're very much at the mercy of our hosting provider's ...
1
vote
1answer
186 views

Windows server trying to use IPv6 despite being turned off

I have a server which needs to communicate with another server (both win 2k8r2). One of them recently had an IP address change, and I suspect that the IPv6 address that the AD DNS server holds is now ...
0
votes
1answer
161 views

what is giving me a backwards IP address?

This is the background: http://superuser.com/questions/400298/cause-of-intermittent-smtp-emailing-sending-problems In short Outlook (2007 IIRC) was receiving the wrong IP address for the SMTP server ...
5
votes
1answer
266 views

IP Address keeps getting assigned that is already in use

I have an internal IP Address (192.168.0.57) that every couple of days will get assigned to a machine which will then periodically lose it's connection to the network throughout the day. The first ...
6
votes
1answer
1k views

Multicast hostname lookups on OSX

I have a problem with hostname lookups on my OSX computer. According to Apple's HK3473 document it says for v10.6: Host names that contain only one label in addition to local, for example ...
2
votes
1answer
200 views

Empty IPv6 address causes DNS error on Macs running Apache Server

For a site I manage, http://archstl.org/, the DNS entry returns an empty (::) IPv6 address when I run $ host archstl.org in the Terminal. I think the errant IPv6 entry may be the cause of my problem: ...
8
votes
3answers
1k views

What determines whether the FQDN is interpreted as IPv6 or IPv4?

When I type a Fully Qualified Domain Name (FQDN) in my URL bar, the browser connects to some mapping table (where is this table stored? with the service provider?) that determines where the file ...