• DNS lookup query

    Good morning,We have observed some unexpected behavior on our DNS server. Looking at the logs it appears to be sending a DNS query to a remote server that is not listed a forwarder in its configuration. The IP and domain lookup in question appear to be related to malware and they are being blocked,...

    gdf19035 pointsBadges:
  • Networking

    I have a question regarding domain identification of a computer. How does the domain determine the operating system of a computer on its network. Does it use the Registry or some other method?

    Bubbagump0 pointsBadges:
  • Old IPs and new IPs on same DNS?

    I have 1 internal and 1 external DNS server. I will migrate a set of existing external IP addresses to a new set of external IP addresses. The old IP addresses will be disabled on a specific cut off date. What is the recommended approach on DNS records for the IP migration? Do we need a new DNS...

    mmCafe5 pointsBadges:
  • DNS for second domain controller

    Hi all, I am planning to install a second domain controller to our main corporate network. There are currently two DC's in place; one is the primary DC, which is a physical server, and the other is the secondary DC which is virtual. My question is about DNS. I understand that when I add a new DC to...

    Lordhowe175 pointsBadges:
  • Problem rejoining server to domain

    Hi, We had to restore a W2K3 server from backup, including the system state. The server recovered ok but was not able to connect to the domain, so we removed it from the domain, rebooted, removed all traces of the server from AD and DNS, and tried to rejoin, but we get the messageĀ "An error...

    Allers196115 pointsBadges:
  • Is it possible to use DNS caching in Linux?

    I'm having a ton of problems understanding DNS caching. I'm trying to write a small forward proxy server and need to use the OS DNS cache on my Linux system. From what I know, there's DNS caching on the browser and OS level (I know Windows has it but I'm not sure if Linux carries it). Can someone...

    ITKE344,655 pointsBadges:
  • How to get the DNS name of a local machine

    I'm trying to create a peer-to-peer instant messaging application and I've run into some difficulties. Now for the users, I want them to the actual hostname of their own machine so both users will see the same text (AKA User 1 and 2). I apologize if this is a dumb question but I just can't figure...

    ITKE344,655 pointsBadges:
  • 451 Temporary Local Problem-please try later

    I am trying to send an email to another domains through Ms Outlook it show me that the message was sent and i receive an error message tell me "451 Temporary Local Problem-please try later" and when i checked the email address which i sent for it the message was not received. It works good before...

    Ramizm0 pointsBadges:
  • Computer account not added to DNS record

    From what I've read, when a Windows DNS client dynamically creates a DNS record for itself, its AD computer account is granted "Write" access to its DNS record, allowing the client to dynamically update it's record in the future. For some reason in our environment several servers' host records are...

    Nickmanderson55 pointsBadges:
  • Routing & Remote Access – VPN

    Hello all, I set up a VPN here at the office about 6-12 months ago and everything was working just fine. The other day some wierd stuff happened, It looks to me like a hacker was involved. The firewall had been killed (DOS attack) and some wierd event log enties were found. But anyway we got...

    Adambeazley0 pointsBadges:
  • What happens when the DNS names exceed the maximum UDP packet size?

    A DNS uses UDP packet to resolve IP addresses. What happens when the DNS names to be looked up exceeds 576 bytes (the maximum UDP packet size)? Can it be sent in two packets?

    NetworkingATE1,545 pointsBadges:
  • Technical College vs. University

    Hello all- Would it be more beneficial to attend a technical college or university? A certain technical college, ECPI (www.ecpi.edu) in VA, has sparked my interest because they advertise 'they meet with some industry experts to discuss tech trends and what education needs to be put out to keep up...

    NeoCentric0 pointsBadges:
  • Using /etc/hosts to create an alias record

    Now I know "/etc/hosts" can be used for overriding DNS definitions (pointing a host name to a different IP address). But now I want to use it to make an alias record. Does someone know if this is possible? Thank you.

    ITKE344,655 pointsBadges:
  • Intemittent ping timout

    We are getting intermittent ping timeouts (Request Timed Out / Destination host unreacheable) from most of the client workstations that are connecting to an exchange server 5.5 running on W2K server. There are about sixty users on the LAN and 20 others that are coming through the VPN link via a...

    Dechamp0 pointsBadges:
  • How to configure DNS server & client in Linux RedHat

    How can I configure a DNS server & client in Linux RedHat?

    Sujeet6465 pointsBadges:
  • Detecting / Reacting to DNS tunnels

    Lately, I've been seeing a lot of talk discussing TCP/IP over DNS requests (usually because port 53 UDP is open and unfiltered). What techniques are out there to detect and block such tunnels? Have you seen such tunneling on a network before?

    ITKE344,655 pointsBadges:
  • Access internal web server with domain name

    I was wondering what is the best method for allowing internal computers to access our locally-hosted web server with www.somedomain.com? I believe the internal clients are unable to do so because of how firewalls/NAT works (?). Is there a way I can add an entry in my DNS server? I am using Windows...

    Skepticals0 pointsBadges:
  • How to configure DNS in CentOS

    How do I configure DNS in CentOS?

    0165 pointsBadges:
  • MsExchangeDSAccess event 2106 2105 — DNS probs?

    Hi, I am having a problem with Exchange and would greatly appreciate any help. Outlook clients are getting the sync folders in the system tray and are froze out of Exchange. This occurs sometimes 2 or 3 times a day. A restart seems to clear things up temporarily. I have Server 2003 Standard with...

    Amcdowell0 pointsBadges:
  • Event ID 4515 – zone exists in more than 1 location in Active Directory

    I posed a question a couple of weeks ago and had no response so I'm hoping I just worded it badly. I'm desperate to sort this out so I'm having another try. The first error I got in my DNS log was Event ID 4515 "The zone contoso.com was previously loaded from the directory partition...

    ITBird15 pointsBadges:

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to:

To follow this tag...

There was an error processing your information. Please try again later.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Thanks! We'll email you when relevant content is added and updated.

Following