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  • Can not join additional domain controllers

    - by Hosm
    Hi all, I had a dead PDC and another not so synced domain controller for my domain. using comments here link now the so called secondary domain controller has seized domain controls and I can verify it from dsa.msc that it is a domain controller. I set up another domain controller (win2003SRV) and about to promote an AD on it as a domain controller for my domain. When I try to join the new domain controller to the domain I face DNS problem. here is some more detail DNS was successfully queried for the service location (SRV) resource record used to locate a domain controller for domain DOMNAME.A.B: The query was for the SRV record for _ldap._tcp.dc._msdcs.DOMNAME.A.B The following domain controllers were identified by the query: update.DOMNAME.A.B Common causes of this error include: - Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses. - Domain controllers registered in DNS are not connected to the network or are not running. For information about correcting this problem, click Help. it is worth noting that update.DOMNAME.A.B is the current domain controller to which I'd like to add another controller named PDC.DOMNAME.A.B Ip address of update.DOMNAME.A.B is 192.168.200.1 and for pdc.DOMNAME.A.B is 192.168.200.100 querying DNS on both machine return correct results. Any idea?

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  • Server Names Inside Private Network

    - by thyandrecardoso
    Our office has a private network, where any requests on a (pre-determined) public IP are forwarded to a private IP inside said network. On that private IP, we've got a server running several services, including HTTP servers, and SCM systems. We only control our private network, having no control on the public IP configuration. We bought a domain name, and pointed it to that public IP, so people can access our services from the outside. But, when inside the office, people can't use that DNS name, because the server and any other hosts inside the network share the same public IP! For desktops, inside the office network, dealing with names is really easy: one entry on the hosts file and we're done. However, for laptops, that keep going in and out, and need to access services inside the office, the naming is really annoying. I don't know the "standard" process for dealing with these kind of situations. I've considered installing BIND in the office, and make people configure their wireless and wired connections to use that DNS server. What is the correct approach in this situation? If using BIND (or any other DNS server) is the answer, how should I configure it so that people inside the office can use it to get our custom names, and get forwarded to the ISP DNS when trying to reach the internet?

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  • BIND9 server types

    - by aGr
    I was configuring DNS on my server using BIND9, everything seems to work, but I have a question regarding my config file. I've ended up with this configuration in /etc/bind/named.conf.local zone "example.com" { type master; file "/etc/bind/db.example.com"; allow-transfer { 192.168.1.1; }; }; zone "1.168.192.in-addr.arpa" { type master; notify no; file "/etc/bind/db.192"; allow-transfer { 192.168.1.1; }; }; forwarders { 10.253.22.140; 10.253.22.141; }; I've read about the different type of dns server, like primary master etc. The first two parts (zone and zone) corresponds to primary dns server configuration. First record for "classic" lookup, second one for reverse. The last part (forwarders) is configuration of cache-server and contains the ISP's IP of DNS server. So all names resolved thanks to this server will be cached. Simple question: am I right? Does my description make sense? Or one server can be only either master or either cached?

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  • Multicast hostname lookups on OSX

    - by KARASZI István
    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 "My-Computer.local", are resolved using Multicast DNS (Bonjour) by default. Host names that contain two or more labels in addition to local, for example "server.domain.local", are resolved using a DNS server by default. Which is not true as my testing. If I try to open a connection on my local computer to a remote port: telnet example.domain.local 22 then it will lookup the IP address with multicast DNS next to the A and AAAA lookups. This causes a two seconds lookup timeout on every lookup. Which is a lot! When I try with IPv4 only then it won't use the multicast queries to fetch the remote address just the simple A queries. telnet -4 example.domain.local 22 When I try with IPv6 only: telnet -6 example.domain.local 22 then it will lookup with multicast DNS and AAAA again, and the 2 seconds timeout delay occurs again. I've tried to create a resolver entry to my /etc/resolver/domain.local, and /etc/resolver/local.1, but none of them was working. Is there any way to disable this multicast lookups for the "two or more label addition to local" domains, or simply disable it for the selected subdomain (domain.local)? Thank you!

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  • Strange behaviour when creating/deleting subdomains

    - by Saif Bechan
    This can be a DNS cache issue from my local machine, but I am not sure. This is what happens. I have a domain that does not use wildcard subdomains, so they have to be created. Without creating the domain, and I point my browser to test.domain.com, I get a page server not found. Now when I create the subdomain, I keep getting the same problem. Now when I first create the domain, without ever visiting the page, I get the normal page, but now when I delete the subdomain, it never goes away. Can this be a DNS cache issue, I am working on a shared environment, maybe the router has a cache but I doubt that. Can this have something to do with my setup. I have tried to use the Google DNS hosting, but this gives me the same results. I have also tried some tools that clear my local DNS cache, they were some add-ons for FireFox. Anyone have any ideas what can be the problem. Are there any tests I can do to see if there is some kind of cache between me and the server.

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  • Sending mail through local MTA while domain MX records point to Google Apps

    - by Assaf
    My domain's email is managed by Google Apps, so that domain users get Gmail and Calendar, etc. But I also want to be able to send applicative notifications to users outside the domain via email (e.g. "some commented on your post", and so on). However, if I try to send email through code I get blocked by Gmail after a few emails. I send marketing email through MailChimp, to minimize the risk of appearing as spam to my users (one-click unsubscribe, etc.). But I can't send applicative message in this way. I want to install a local MTA (my server runs Ubuntu), but I'm not sure what anti-spam measures I need to implement so that receiving MTAs don't think it's a spam server. What's stopping anyone from setting up a mail server and sending emails using my domain name? AFAIK it's the DNS records that show the MTA's address actually belongs to the domain. But my understanding of this is rather superficial, so someone please correct me if I'm wrong. But what sort of DNS configuration do I need to put in place so that I don't get blacklisted (assuming I don't actually spam anyone)? The MX records already point to Google, and I'd like to keep it this way. So do I just need to define an A record for my internal mail server? Should it show email as coming from a sub-domain, so as not to conflict with the bare domain being managed by google? Edit: Does the following SPF record make sense if I want email from my domain name to be sent by either google's servers or any server with a dns name ending with mydomain.com? "v=spf1 ptr mx:google.com mx:googlemail.com ~all" How should I set up reverse DNS for my server? If I have an A record that points mailsender.mydomain.com to my MTA's ip address, does it mean that reverse lookup will only allow emails sent from [email protected]?

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  • BIND master/slave does not respond for queries for its slave

    - by Savas
    Systems are all Centos 6.2 Lets say I have a masterdns with IP 10.2.1.2, authoritative for the 10.2.1.X subnet and let say it is domain example.com I have another two subnets, 10.2.2.X and 10.1.2.X Each one has its own DNS server, dns2 and dns1 respectively and let say these are domains dom2.example.com and dom2.example.com respectively. The masterdns server has slave zones for dns1, dns2 and respond to requests OK. The dns1, dns2 have the masterdns zones as slaves two, and respond to requests OK. So, the masterdns has as slave zones all the subordinate domains of example.com Each of dns1 and dns2 use masterdns as a forwards (which uses another dns cache/proxy server) for dns resolution of internet public domain names. It works OK that too. The problem is, and I cannot figure it out. Why queries for example at dns1 for hostnames of dom2.example.com do not resolve? If i use nslookup - masterdns at dns1 server, resolve (i use directly the dns facility of masterdns). If I use nslookup locally, meaning queries are sent to dns1, for hosts that are at dom2.example.com, they do not resolve. Everything other works OK.

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  • DNS Issue- Nameserver Issue

    - by Master-Man
    I setup new server on centos 5.3 and configure dns and hostnam using WHM. I also register my new nameservers with my domain registrar with ns1.example.com and ns2.example.com. But i am unable to ping hostname and NS. ping pc2.example.com or ping ns1.example.com I received the below email from server. IMPORTANT: Do not ignore this email. Your hostname (pc2.example.com) could not be resolved to an IP address. This means that /etc/hosts is not set up correctly, and/or there is no dns entry for pc2.example.com. Please be sure that the contents of /etc/hosts are configured correctly, and also that there is a correct 'A' entry for the domain in the zone file. Some or all of these problems can be caused by /etc/resolv.conf being setup incorrectly. Please check that file if you believe everything else is correct. You may be able to automatically correct this problem by using the 'Add an A entry for your hostname' option under 'Dns Functions' in your Web Host Manager. When I issue the command root@pc[~]# host pc2.example.com I receive the below error that Host pc2.example.com not found: 3(NXDOMAIN) I added A entries for hostname and Nameservers but nothing replies. Its almost more than 72 hours for setting & registering nameservers and dns configurations. thanks,

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  • How browsers handle multiple IPs

    - by Sandman4
    Can someone direct me to information on exact browsers behavior when browser gets multiple A records for a given hostname (say ip1 and ip2), and one of them is not accessible. I interested in EXACT details, like (but not limited to): Will browser get 2 IPs from OS, or it will get only one ? Which ip will browser try first (random or always the first one) ? Now, let's say browser started with the failed ip1 For how long will browser try ip1 ? If user hits "stop" while it waits for ip1, and then clicks refresh which IP will browser try ? What will happen when it times-out - will it start trying ip2 or give error ? (And if error, which ip will browser try when user clicks refresh). When user clicks refresh, will any browser attempt new DNS lookup ? Now let's assume browser tried working ip2 first. For the next page request, will browser still use ip2, or it may randomly switch ips ? For how long browsers keep IPs in their cache ? When browsers sends a new DNS request, and get SAME ips, will it CONTINUE to use the same known-to-be-working IP, or the process starts from scratch and it may try any of the two ? Of course it all may be browser dependent, and may also vary between versions and platforms, I'd be happy to have maximum of details. The purpose of this - I'm trying to understand what exactly users will experience when round-robin DNS based used and one of the hosts fails. Please, I'm NOT asking about how bad DNS load balancing is, and please refrain from answering "don't do it", "it's a bad idea", "you need heartbeat/proxy/BGP/whatever" and so on.

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  • Did my registrar screw up or is this how name server propagation works?

    - by Brad
    So my company has a number of domains with a large registrar that shall go unnamed. We are making some changes to our DNS infrastructure and the first of those is we are moving our secondary DNS from one server on site to four servers offsite. So we updated the name servers for each domain at the registrar by removing the entry for the old secondary name server and adding the four new ones. I monitored the old secondary server for requests and when I saw no new requests had been made for 24 hours I shut it down. That was this morning. I assumed at this point everything was good. Unfortunately this was my mistake. I should have gone and made sure name servers at large were returning the correct NS records. So this afternoon we were performing maintenance on our primary DNS server and we shut it down. This is when I started getting alerts from our external monitoring. I checked and sure enough, the DNS server used there reported the only NS record for our primary domain was the primary name server. The new secondary servers were not listed and neither was the old secondary. Is it unreasonable of me to have assumed that because the update was from ns1.mydomain.com ns2.mydomain.com to ns1.mydomain.com ns1.backupdns.com ns2.backupdns.com ns3.backupdns.com ns4.backupdns.com in one step at the registrar that there should be no intermediate state where the only NS record was for ns1.mydomain.com? Going forward to be safe obviously I will always leave the old name servers alone until after I'm 100% sure the new ones have propagated and only then remove the old name servers from the registrar. However, I'd still like to know if my registrar screwed up or if my expectation was unreasonable.

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  • Cannot make bind9 forward DNS query to subdomain unless recursive enabled

    - by PP.
    I am trying to develop my own dynamic DNS. I'm running my own custom DNS for the subdomain on port 5353. ASCII diagram: INET --->:53 Bind 9 --->:5353 node.js | V zone_files I have example.com. The node.js DNS is for dyn.example.com. In my /etc/bind/named.conf.local I have: zone "example.com" { type master; file "/etc/bind/db.com.example"; allow-transfer { zonetxfrsafe; }; }; zone "dyn.example.com" IN { # DYNAMIC type forward; forwarders { 127.0.0.1 port 5353; }; forward only; }; I've even gone so far as to add a NS in my example.com zone file: $TTL 86400 @ IN SOA ns.example.com. hostmaster.example.com. ( 2013070104 ; Serial 7200 ; Refresh 1200 ; Retry 2419200 ; Expire 86400 ) ; Negative Cache TTL ; NS ns ; inet of our nameserver ns A 1.2.3.4 ; NS record for subdomain dyn NS ns When I attempt to get a record from the subdomain server it doesn't get forwarded: dig @127.0.0.1 test.dyn.example.com However if I turn recursive on in /etc/bind/named.conf.options: options { recursion yes; } .. then I CAN see the request going to the subdomain server. But I don't want recursion yes; in my Bind configuration as it is poor security practice (and allows all-and-sundry requests that are not related to my managed zones). How does one forward (proxy) zone queries for just one zone? Or do I give up on Bind altogether and find a DNS server that can actually forward specific queries?

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  • james - mail server DNS configuration

    - by Chaitanya
    hi, I am setting up james mail server. I installed James and added in the config.xml added the servername as mydomain.com. In the DNS for mydomain.com, I have created a A-record, say mx.mydomain.com, which corresponds to the ipaddress of the above mail server machine. Then added mx.mydomain.com as MX record for mydomain.com. In James, I have created a new user test. From the user I have sent a mail to my gmail account. I see that the mail is accepted and the mail is in outgoing folder of James. But it's not relay to the gmail server. In the config.xml of James, I have added 8.8.8.8 and 8.8.4.4 as the dns server addresses, which are public DNS servers hosted by Google. IPTables on the machine is stopped. Thanks for your help!

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  • how to reference a ppp adapter in windows command?

    - by ollydbg23
    When using the windows command ipconfig /all, the result will show a PPP adapter followed by a long name closed with braces. It looks like the below image: When I try to set the DNS of my PPP adapter, I encounter this problem: netsh interface ip set dns "PPP adapter {1C43A7B0-1173-40E2-96D6-1DA6457786B0}" static 208.67.222.222 Invalid interface PPP adapter {1C43A7B0-1173-40E2-96D6-1DA6457786B0} specified. I have also used the pure string "{1C43A7B0-1173-40E2-96D6-1DA6457786B0}", but with the same result. How can I reference this PPP adapter, so that I can change its configured DNS and other settings? What does this long string mean? I do not have this PPP adapter connection on my "show all connections" panel, because I have a VPN app - when running it, this PPP adapter will be automatically created for me.

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  • setup Mac Book Wifi interface as Wifi hotspot using specific DHCP option

    - by srjohnhuang
    I want to using my Mac Book as an access point. Besides that I also need to configure its DHCP server to not provide DNS info. For example, Mac Books AP's ssid is "MacBookHotspot". While my iPhone connected to "MacBookHotspot", I want the Wifi info displayed my iPhone would be looked like: IP ADDRESS DHCP(tab) IP Address 192.168.0.1 Subnet Mask 255.255.255.0 Router 192.168.0.254 DNS Search Domains Client ID (key point: DNS filed is blank) Does anyone have any good suggestion? Thanks!

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  • Change my MX record on my server to google MX?

    - by Dejan.S
    Hi. I got a windows server 2008 where I host a site, now I decided to have the email on google apps. I did add the MX records I get from them to my DNS settings on the server but with no luck. I recently started doing server stuff so I did like this. Server Manager / Roles / DNS Server / DNS / SERVERNAME / MYDOMAIN / Forward Lookup / New MX Host or child domain: What goes here? FQDN: here is my domain name, i think because I named the ns my domain? FQDN MX: here is the google MX record I got from them MSP: 10 I have no Idea where I go wrong but I thought I would ask you guys if any of you can maybe give me some tips on what to look for or any newbee mistake I do that you see from this little info. I really appreciate all help I could get on this.

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  • Website running on Tomcat port 8443 will only resolve with IP address, not dns

    - by littleK
    I recently set up a web server running tomcat 7 on Ubuntu 12.04. It is currently running on port 8080, however I just enabled SSL on port 8443. Here's my problem: For port 8080, the website is resolved with DNS: (http://www.mywebpage.com:8080) For port 8443, I can only access the website with the IP Address (http://0.0.0.0:8443). It will not work if I use the DNS name. I ultimately want to disable port 80 and use port 8443 only. Does anyone know why I cannot resolve the website on port 8443 using DNS, and how I might fix it? Thanks!

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  • Azure cloud app subdomain pointing to actual domain

    - by Amit Aggarwal
    Say we have a domain xyz.com registered with some registrar ... we pointed that domain to the name server of our dedicated server where the DNS will be hosted for that domain. Now, we just want that dedicated server to host the emails coming and the domain will point to abc.cloudapp.net (azure cloud app, they don't provide any static IP ... and only public url is given) Now, someone please helping me in editing/creating the DNS file on our dedicated server to make sure things work properly... if possible past here minimum settings we need in DNS file to make sure mails are on dedicated server and app is on cloud... Thanks, Amit

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  • OpenDNS servers initial response is very slow

    - by Ben Collins
    I've got a Time Warner cable ISP package (RoadRunner), and the modem they gave me doesn't allow me to specify which DNS servers to use; it always uses whatever the upstream dhcp server gives it. I prefer to use OpenDNS on my home network, so i've configured a couple of my PCs manually in the Windows adapter settings for IPv4 such that their IP addresses are obtained via DHCP, but the DNS server settings are fixed to the OpenDNS server IPs. Now, when I startup Windows on these PCs, it always takes 2-3 minutes to start receiving responses from the DNS servers; any request before that times out. While not debilitating, this is quite annoying. Any ideas why this might be happening?

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  • Using Linode as a proxy server wrapped in DNS to bypass paid internet services

    - by snihalani
    I have a linode server that I use for development. I was thinking of using that as a proxy server. I have noticed that most paid connections allow DNS queries but don't allow http until I pay them. I verified this by flushing my dns cache and nslookup some random websites. How do I create a proxy server that allows me to may be wrap my packets from my computer in DNS packets, relay to my linode server with ssh key authentication and act as a broker? Thanks.

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  • One-way forest trust between geographically distributed forests using Server 2008 R2

    - by bwerks
    Hi all, I'm planning out a joinder between two domains, as would take place with contracting companies. Forests A and B exist in distant sites, and there is to be a one-way forest trust so that domain users in Forest A can be authenticated on machines in Forest B. In order to facilitate this, each forest's domain controller must be able to contact each other in order to set up & confirm the trust, but my question is what underlying networking magic must take place beneath it. So far the prevailing approach has been to maintain a VPN connection between the two sites, but the technet documentation seems to indicate that DNS forwarding may be the way to go. Is this the case? Furthermore, if DNS will suffice, does that mean that there must be a server running DNS on boundary servers in each domain so that they can be reached from across the internet? How must they be configured? Thanks!

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  • Ubuntu, apache2 wildcard dns to subdomain

    - by Mark van Velthoven
    Currently I'm hosting my own (ubuntu) server with the following services: samba, ftp and a webserver. I've bought a domain and linked the DNS A-record to my ISP's IP. This is working correctly. Now I'd like to use the DNS wildcard-record to create subdomains. I want to avoid waiting 24hrs before the DNS change completes. Thusfar I'm only able to redirect all incoming wildcards to the same directory: test1.domain.com redirects to /var/www test2.domain.com redirects to /var/www Although I'd like to get: test1.domain.com redirects to /var/www/test1 test2.domain.com redirects to /var/www/test2 My guess would be to change the file /etc/apache2/sites-available/domain. Any help or tips would be welcome! Thanks, Mark

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  • IIS Seems to Forward Domain/IP to Domain Controller

    - by asinc
    We have a server (Server 1) with Win 2008 that is accessible by RDP and also is set as the primary DNS IP for a domain (example.com). This server is on the same network as an SBS 2008 server (Server 2) which is the domain controller and internal Dns server. Web requests going to example.com with IP of Server 1 are being passed to Server 2 and served up by IIS from Server 2. What causes this to happen? Is there a safe way to have Server 1 IIS handle the web requests which was our expected outcome? Example: DNS entry on ISP: example.com = 111.111.111.111 Server 1 = 111.111.111.111 Server 2 = 111.111.111.112 Web user goes to example.com in browser, and the page is actually returned from 111.111.111.112?

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  • ISC Bind support for GSS-TSIG DDNS Updates?

    - by netlinxman
    First, has anyone EVER configured ISC bind 9.5.0 OR greater with support for GSS-TSIG Dynamic DNS Updates AND gotten it to work? If so, what is the configuration that was used to make that happen? I feel close to having this working. I see that GSS cred passes w/o apparent error during the TKEY negotiation with an Active Directory DC and the BIND DNS server: client 192.168.0.30#52314: query gss cred: "DNS/[email protected]", GSS_C_ACCEPT, 4294967256 gss-api source name (accept) is [email protected] process_gsstkey(): dns_tsigerror_noerror client 192.168.0.30#52314: send But, when the Update is sent, it is refused: client 192.168.0.30#58330: update client 192.168.0.30#58330: updating zone 'example.com/IN': update failed: rejected by secure update (REFUSED) client 192.168.0.30#58330: send Does anyone have this working in the real world?

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  • Join domain in windows 7 [on hold]

    - by Hassan Ali Khan
    I have created a domain on server machine and when i am trying to join a domain through another machine of windows 7 through the following steps: Goto MY Computer Properties - Change settings - ComputerName - click on change button - click on radio button "Domain" and enter domain name. After that when i click on OK button and enter the username and password credentials. It show me the following error: An attempt to resolve the DNS name of a domain controller in the domain being joined has failed. Please verify this client is configured to reach a DNS server that can resolve DNS names in the target domain

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  • How can I migrate websites between two identical servers?

    - by edude05
    I have two servers that have a nearly identical (software) configuration. We are upgrading the web servers to run windows server 2008 R2, one already is however the main one (that currently has sites) is on WS2008. Now, the old server is ns.mydomain.com and the new server is ns1.mydomain.com. Since dns automatically fails over to ns1.mydomain.com I'd like a way to move all the vhosts to the new server. Is there an automatic way to move / recreate all the vhosts on the new server? I have figured out how to migrate the DNS records already DNS Migration and since both servers are on the same private network migrating the website data isn't a large issue. Every site is running PHP & MySQL and the MySQL server is external so the records won't have to be moved. Thanks

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