FirstDNS

Archive mensuelles: décembre 2014

Options other than my ISP's DNS?

I am in the process of reading up on VPN’s and in doing so, stumbled upon the importance of having altered DNS servers. As of now, my DNS server is provided by my ISP, and I would like to change this. In addition, I would like to begin using a VPN, but that is a topic for another day.

Does anyone have any particular recommendations when choosing another DNS? I am running OpenSuse 13.1, not that it matters. Thank you in advance; any guidance would be greatly appreciated.

submitted by aclaybor
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Low-maintenance split horizon DNS?

Currently several of our main domain names are manually replicated into our corporate windows DNS servers from our api-less DNS provider.

As you can imagine, over the years we’ve got loads of discrepancies between both zones, records existing on one side but not the other which is pain.

I’ve started to shift domains to existing externally only and removing our internal zones where possible, which has some success, but the exception to this is where we actually want record asymmetries, these are where we have private routes to various services we’d rather use internally.

I’ve actually mostly dealt with this issue via planning to keep only a single zone internally, companyname.com. On this zone I’ve created publicipname.split.companyname.com which exists both internally and externally. Externally it points to the public IP, internally it points to the corresponding internal routed IP.

So when I have a website I want to use different routes I create a CNAME for www.websitename.com to publicipname.split.companyname.com which then handles the split routing without me having to host the www.websitename.com zone internally.

The problem is that I’m left not knowing how to route websitename.com because of how you can’t CNAME the root record.

How should I fix this issue?

submitted by Deku-shrub
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pointing third party DNS to zpanel domain on VPS?

I’ve tried googling this for days and I honestly couldn’t find a legitimate answer. I’m running a VPS with Zpanel installed (CentOS 6.6) and created a domain. I want a third party DNS service, such as dottk or DNS4.pro to point to my domain that I’ve created on ZPanel. I’ve tried using DNS4.pro by changing the nameserver (on my zpanel) to that of DNS4s. That didn’t seem to work. I feel like this should be an easy thing to do, just don’t know why it’s not working.

submitted by Whysosrsdog
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Retrieve MX records using nslookup

One of my new kids on the block asked me a question tonight; “Jermal, how do I get the mx record of a domain?”

To retrieve mx record information we need to use a tool called nslookup which is available in Windows and Linux

The quick syntax use is nslookup [-option] [hostname] [server]

Example of its usage nslookup -type=mx jermsmit.com 8.8.4.4

I hope this helps,

jermsmit #jermalsmith

web link: http://jermsmit.com/retrieve-mx-records-using-nslookup/

submitted by jermsmit
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DNS lookup failed or very, very, slow.

Everyone thought it was bandwidth utilization but we brought in a new 50/10 circuit (this issue wasn’t the deciding factor) and it may have gotten worse.

Symptoms: Pages load slowly, I mean 56k slow but only sometimes, but frequently, or pages load halfway but on refresh almost instantly.

Since the latest chrome update it actually gives the « webpage is not available » error before eventually loading.

Environment: Windows – both DC and PDC are 2012, all workstations are W7. Only one domain in forest.

PDC refers to it’s self as preferred DNS server:

DC refers to PDC as Preferred DNS and it’s self as Alternate DNS.

Gateway points toward ISP’s DNS currently but I’ve changed that around in the past to see if that was the issue. No URL filtering or monitoring set up, DNS Lookup and Proxy are enabled.

Workstations DNS set to PDC, DC, and Gateway.

Another thing that makes me think it’s DNS related is that down and up speeds are normal, it’s only page loads that are slow.

Servers are showing no DNS errors. I’ve tried it with the AV disabled but issues persisted.

Any help or a point in a direction is appreciated.

submitted by convulsus_lux_lucis
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