So I am currently gathering information in regards to renaming our AD domain name from company.net to company.local. I am reading through the docs on technet.microsoft.com and It states that I would need to prepare the new DNS zones before executing the domain rename. The question I am asking about is regarding the _msdcs subdomain _msdcs.company.net I have read posts of forums where people reported issues after renaming their domain and not having the _msdcs [...]

I was reading about DNS some days ago and learned how the requests are processed. If you surf to www.example.com, then a request will go to the Root Name Servers to see who owns that .com address, then another request will go to another, more local, DNS server to see who owns the example.com address and so on. How is it technically possible that the 13 Root Name Servers can handle all requests done by [...]

I would like to use my own outbound email server Haraka with Node.js and Google Apps for inbound mail. Now my domain registrar gives one click Google Apps setup, however I’ve already set up my own outbound server and it says: Caution: The main domain name (www.)mydomain.com is using MX : mail.mydomain.com already. If you want to add Google Apps, you need create a subdomain, e.g. xyz.mydomain.com or remove MX : mail.mydomain.com. So how can [...]

I need to change the DNSs of my domain, and I’m getting an error that the DNSs aren’t registered. Maybe they simply haven’t propogated yet, but it ocurred to me that what I’m doing seems kind of recursive. If my domain is example.com and my DNSs are ns1.example.com and ns2.example.com, is there a problem with doing that? It seems like I’m trying to point the domain to itself. And in case you’re wondering, I didn’t [...]

When I ping the server sip3.voip-centrex.net, I get this output: PING sip3.voip-centrex.net (194.98.81.144) 56(84) bytes of data. 64 bytes from mpfrrelay.michaelpage.fr (194.98.81.144): icmp_req=1 ttl=50 time=35.7 ms 64 bytes from mpfrrelay.michaelpage.fr (194.98.81.144): icmp_req=2 ttl=50 time=38.1 ms 64 bytes from mpfrrelay.michaelpage.fr (194.98.81.144): icmp_req=3 ttl=50 time=34.6 ms Domain name does not match. What does it mean ? Asked by alci The DNS system has many kinds of records. “A” records map names to IP addresses. “PTR” records map [...]

I recently started looking into a problem where an IT service desk user reported getting connected to an incorrect workstation while trying to help an internal customer. I started digging around our DNS and WINS servers and found a huge number of entries in our AD integrated internal forward and reverse lookup zones that have timestamps that are months & years old; going back as far as September 2010. Scavenging is enabled and set to [...]

I have my own domain and also a Gmail account. I would like to have all the emails sent to my domain’s email address redirected to my Gmail account; that is, I want all the emails sent to myname@mydomain.com to be received on my Gmail account instead, as if they had been sent to myname@gmail.com I have configured my domain’s DNS records to point to Gmail’s mail server, as explained in Gmail documentation. However, when [...]

At one point, on our SBS 2011 server, I had 2 IP addresses assigned to the primary NIC. This resulted in Windows adding a static entry for both IPs to the DNS when the DNS server started. This of course caused all manner of confusion, so I eventually removed the secondary IP address. However, every time the DNS server service is restarted, a static entry for the no longer present IP address keeps reappearing. Obviously, [...]

Somebody has 2 e-mail addresses: bob@domainname.com.br and bob@domainname.com . The DNS records for these domains look like this: domainname.com.br $ dig any domainname.com.br ;; ANSWER SECTION: domainname.com.br. 86179 IN SOA ns1.domainname.com.br. suporte.domainname.com.br. 2010081200 20000 4000 1409600 86400 domainname.com.br. 86179 IN MX 10 domainname.com.br. domainname.com.br. 86179 IN A 177.39.XXX.YY domainname.com.br. 85342 IN NS ns1.domainname.com.br.;; AUTHORITY SECTION: domainname.com.br. 85342 IN NS ns1.domainname.com.br.;; ADDITIONAL SECTION: domainname.com.br. 86179 IN A 177.39.XXX.YY ns1.domainname.com.br. 85342 IN A 177.39.XXX.YY domainname.com $ dig [...]

Note: Wrong assumptions It turned out that the VPN is configured to redirect all name lookups to a different server. So the problem is not the Windows DNS but the VPN Gateway. Original Quesiton I have a remote network 10.12.0.0/16 with a Windows Domain Controller (SBS 2011) and a VPN Gateway. Some Windows PC (no domain member) uses a l2tp VPN to connect to the SBS. It gets a virtual IP in 10.14.0.0/24. The VPN [...]