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0
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1answer
30 views

Reviewing source of DNS requests

Is there a way to know the source of DNS requests which were handed to the Forwarder (requests which were handled by the DC are of no interest)? If I set up a BIND server which is a forwarder to the ...
11
votes
2answers
277 views

How to disable AAAA lookups?

... to compensate for broken DNS servers that are outside our control. Our problem: We deploy embedded devices that collect sensor data at various, mostly IPv4-only sites. Some sites have poorly ...
1
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2answers
38 views

Do DNS servers get queried in round-robin, random or some other fashion?

I know for a fact that A records and most other records are round-robin. MX records have priority types. What about D(NS) servers? Both in the context of NS record and static configuration in client ...
1
vote
1answer
975 views

CIFS mount in fstab succeeds on IP, fails on hostname written in /etc/hosts

I wonder why my Ubuntu Server 14.04 LTS has problems resolving a hostname from fstab. I tried to mount the following entry: //NAS-5h2-20/backuppc/ /mnt/backuppc cifs ...
1
vote
1answer
117 views

DNS caching for a DNS name with two different IP addresses (internal vs. external)

Suppose we have a DNS entry ocean.corp.tld internally pointing to an internal IP address on our corporate network, and externally pointing to an external public IP address. Essentially same DNS name ...
0
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0answers
118 views

Can't figure out how to get started with powerdns-recursor lua scripting

I have a server (Ubuntu 12.04) where I run powerdns-recursor. I'm trying to add some logic to certain requests and have got my target set on lua scripting for powerdns. I don't seem to be able to ...
0
votes
1answer
37 views

pdns-recursor allocates resources to non-existing queries

I've got a lab-server running pdns-recursor. I set it up to experiment with rate limiting, so it has been resolving requests openly from the whole internet for weeks. My idea was that sooner or later ...
3
votes
2answers
367 views

No SOA record — what are the implications?

I was investigating a bunch of spam domains, and none of them have an SOA record. I have never seen this before -- I didn't even know it was possible. How can DNS work without an SOA record? If it ...
2
votes
1answer
151 views

Name resolution for internal network hostnames

I plan on standardizing host naming conventions and want to setup an "internal" network to allow easy communication between different servers. We purchase servers from multiple different dedicated ...
-1
votes
2answers
60 views

name resolution by name in /etc/hosts

I have to check website performance through various webproxies from my Fedora 19 box, and I want to do that by setting a local resolvable name "proxy" to the DNS resolved names for our proxies in my ...
10
votes
2answers
272 views

Name resolution difference between CentOS and Debian

I have a small Java program that loops calling InetAddress.getByName("example.com") every second. When I run it on a CentOS 6.4 box using 'strace -f' I see that /etc/resolv.conf is opened and read ...
0
votes
2answers
615 views

nginx, dns - domain.com resolves but subdomain.domain.com doesn't

I am going to pull my hair out! I have a website domain.com with the following virtual host configuration /etc/nginx/sites-available/domain: server { listen 80; server_name ...
0
votes
3answers
99 views

Doesn't DNS diversity negatively affect performance? Why/how?

If you look at the press releases of various orgs that run the internet, you can see them praise the fact that now they run root server X in city Y, as if that magically makes everyone in city Y get ...
0
votes
1answer
69 views

best approach for small network cut off from main domain

I'm not an IT guy so please bear with me, any helpful approaches for this would be great. My team and I are working in a field project that essentially made us physically move to a new location, ...
1
vote
1answer
110 views

Disable hostname resolution in PAM

When authenticating using PAM, PAM exposes the remote host to the module. On the code side of things, it exposes this via PAM_RHOST using pam_get_item(). However, PAM will attempt to resolve the IP ...
0
votes
1answer
111 views

DNS Resolution for example.com - Can you explain? [closed]

When I type mynewdomain.com into my browser I believe the following happens. My computer sends a request to my ISP's name servers to find the IP address of mynewdomain.com My ISP name server sends a ...
0
votes
3answers
499 views

How does a remote IP address resolve to localhost?

I just noticed this strange warning in my syslog: postfix/smtpd[26261]: warning: hostname localhost does not resolve to address 113.167.250.138 ...which is then immediately followed by: ...
1
vote
2answers
3k views

Is it possible to have round-robin DNS with /etc/hosts file?

Is it possible to have round-robin DNS with the follwing configuration in /etc/hosts? 192.168.4.10 shaakunthala.local 192.168.4.20 shaakunthala.local I'm on Linux.
0
votes
1answer
649 views

resolv.conf search suffix limited to six domains and 256 characters

Is there a way to increase the resolv.conf search suffix limitation beyond six domains and 256 characters? This is an issue for an environment that has well over six domains to consider. I realize ...
0
votes
1answer
225 views

Resolving Domain Name to IP Bsased on Location

I am currently setting up two web servers for a client on Amazon AWS (EC2). Both are up, secure and functioning (one is in Singapore and one is in North America) and everything is great. However, as ...
1
vote
1answer
52 views

Should the DNS and web server be on the same location?

I own 2 domain names pointing to the same webserver: the DNS server of domainA.com is hosted by provider A (e.g. in New-York) the DNS server of domainB.com is hosted by provider B (e.g. in London) ...
3
votes
1answer
819 views

How to forward missing DNS names of an existing zone in Windows DNS server?

I have setup DNS records for a public domain (say example.com) in my public DNS provider. Among the records, there are some A records of the type *.production.code.example.com that point to a specific ...
0
votes
2answers
282 views

Resolution of public domain server internally

I have an issue with my users internally not being able to resolve the public namespace internally. I use domain.local as my internal namespace and domain.com as my public namespace. However I cannot ...
0
votes
0answers
46 views

Lookup Cisco VPN client computer

Our client is running Cisco SSL VPN accessed by AnyConnect clients. Now we have one particular remote computer that is special in such that it connects and consumes services on the network as a ...
3
votes
1answer
1k views

Disable AAAA lookups in libcurl

We have a step during in of our large map reduce that does DNS resolutions. The application itself uses the c-ares library as well as libcurl. I notice that with each resolution, there is first an ...
0
votes
1answer
44 views

Initial connection to static IP is slower

We have a simple printer running a jetdirect service on 9100 listening for incoming characters. It is sits behind a modem that serves a static IP to a router. I can telnet in and print arbitrary ...
2
votes
2answers
982 views

Windows 7 is skipping the primary DNS server and moving straight to the alternate DNS server

I'm running into an odd issue with a number of Windows 7 machines on my network. These machines are currently configured to use a local DNS server, 192.168.1.42, as their primary DNS server. Google's ...
0
votes
1answer
121 views

Bind9 can't resolve mbs.microsoft.com

Our Bind 9 on Ubuntu 10.04.4 (9.7.0.dfsg.P1-1ubuntu0.8) can't resolve mbs.microsoft.com. Other Nameservers seem to be able to resolve the Name. This is what bind logged on debug 9: query failed ...
-1
votes
1answer
226 views

ubuntu server name resolution order

I am using LAMP on Ubuntu server, and I need to query MSSQL database on Windows XP machine, both on the same network. I use winbind to resolve SMB hostnames. My problem is name resolution order. It ...
0
votes
0answers
182 views

One dns server in different subnets

I have installed a small Linux server; the server is in a different subnet as the internet hosts. I added a route to my nat router to create a connection between both subnets. In both subnets I use an ...
0
votes
0answers
328 views

Host Name Resolution - ISA 2006 - VPN PPTP

We are running an ISA 2006 server and PPTP VPN connection works fine. Clients are able to connect to internet, access Outlook, CRM, etc. The problem we are encountering is that host name resolution is ...
-2
votes
2answers
361 views

Nameserver not resolving or domain not pingable [closed]

Sorry, if anyone can think of a better title please change it! I want to host my own websites from home. For testing purposes, I have a virtual machine running a trial version of Windows Server 2008 ...
2
votes
2answers
176 views

Conflict between local DNS zone and country domain name

I have recently setup a new Windows 2003 server for a regional office in Germany. The server has been setup as a child domain on our corporate setup and, being in Germany, the domain was called de, so ...
4
votes
1answer
3k views

Adjust Windows DNS timeout similar to the Linux resolv.conf?

I'm curious if there's a mechanism to adjust the Windows client resolver timeout in the same manner that the "timeout" option in the Linux /etc/resolv.conf file works. For example, my Linux ...
0
votes
1answer
749 views

Name resolution not working with ipv6 on centos

I just installed CentOs 6.3 on a server to be installed in a data center, but cannot get name resolution / curl to work. I know this is because of it trying to use ipv6, since ping google.com works, ...
0
votes
1answer
420 views

BIND: Redirect all lookups to a different nameserver using NS

I'm creating a dns server for a local network, and I need to do redirection based on the domains. Also, i'm fairly new to DNS. I have to redirect all "ia.in" domains to a different local nameserver ...
1
vote
1answer
1k views

Machine name resolves to wrong IP

I have a machine called server1 (windows server 2008). It was initially set to have an automatically assigned IP by the DHCP server (windows server 2008). It assigned it 192.168.0.180. I changed ...
1
vote
2answers
458 views

How to configure samba to workaround UDP broadcast problems?

I have a problem that NetBIOS name of my Ubuntu laptop connected through WiFi cannot be resolved from other machines. Using a packet sniffer and nmblookup I figured out that the wlan interface doesn't ...
0
votes
2answers
753 views

Name resolution in an IPv6 network without a DNS server

Background: I have a network with Windows and Linux machines The router doesn't support IPv6, but the computers have link-local addresses (fe80::/10), and I plan to buy an IPv6-capable router in the ...
0
votes
3answers
404 views

How does domain resolution occur when resolv.conf is blank and your server has a static IP?

I've installed ubuntu server 10.04 on a computer in my LAN. From my router control panel I set it up to be Static DHCP. My resolv.conf file had the output nameserver 192.168.1.1 I removed that ...
0
votes
1answer
170 views

Resolving samba server hostnames

I have a samba server and I want to access it by name from my windows machine. Currently if I can use the ip address e.g. \\192.168.0.104 (although it does not appear automatically in network) to ...
3
votes
1answer
760 views

Microsoft Network Monitor 3.4 - how to disable DNS IP address resolving for Source and Destination columns?

I've downloaded Microsoft Network Monitor 3.4 and it appears that I can't disable IP address to hostname DNS resolution. Is there a way to disable the DNS resolution so i.e. I'd always see: ...
0
votes
3answers
2k views

I can ping IPs, but can't ping any domain

I have a CentOS 6 x86 server. If I ping 8.8.8.8 and my server gateway, there's no problem. If I ping google.com, yahoo.com, etc, it returns "ping: unknown host google.com". When I saw this problem, ...
1
vote
2answers
473 views

Simulate different domains on the same machine

I'm going to have 2 servers (SSO and application server) running on the same machine but listening on different ports. Is it possible to assign them following addresses: example.com and ...
1
vote
2answers
84 views

DNS and correct routing [duplicate]

Possible Duplicate: What is the correct behaviour when Nameservers Change I registered a domain at GoDaddy and changed the nameservers to my server's. (GoDaddy sets up the domain using ...
1
vote
1answer
235 views

windows 7: Name resolution not working as expected when connected via VPN

I have a local machine on my home network called "sheeva" (it's a sheevaplug linux server running subversion). I can connect to it fine using it's local IP address of 192.168.1.108, and when I'm not ...
1
vote
1answer
144 views

Can the DNRD master file contain multiple records for a name?

I am trying to get DNRD to serve certain records from the master file in a round robin manner. I have tried several combinations e.g.: 1.1.1.1 hostnameA 2.2.2.2 hostnameA 1.1.1.1 2.2.2.2 ...
0
votes
2answers
143 views

Looking for Iterative Resolver

I am looking for an Iterative Resolver server - a server that would handle the DNS resolutions for PC users in an environment. I am well aware of the Microsoft DNS and Bind, and also of free services ...
0
votes
1answer
341 views

Resolver Timeouts in Bind 10

Is there any detail on how bind 10 handles resolver timeouts? The latest info I could find was on Bind 8.2.1+ http://fengnet.com/book/DNS.and.BIND.5th.Edition/dns5-CHP-6-SECT-2.html The resolver ...
-1
votes
3answers
427 views

Host name resolution on Windows 7

Other than specifying the host name in the host file for web site are there other steps needed to be able to refer to the site by that name instead of the ip address? I want to access the site like ...