• 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...

    ITKE62,455 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...

    ITKE62,455 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.

    ITKE62,455 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?

    ITKE62,455 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:
  • Setting up small LAN with server

    In our office we have 10 stations running in Windows XP Professional Services Pack 2, and we have a DSL connection. In addition, we have an existing LAN composed of 10 workstation, 2 hub with 8 port and router for my internet connection. Please help me figure out how to setup my LAN with...

    Arwin210 pointsBadges:
  • Changing ISP and re-configure the Server-firewall

    Hi all, I'm usually on the programing side but due to our small company changing our ISP, I need to resolve why we can't access the internet only from our clients/workstation. So this is the data I have: i. Current setup we have is: 1 Windows server 2003 (with Exchange on it for emails), the Server...

    AviZ200710 pointsBadges:
  • Difference between Netbios and Host name

    Dear all,I am preparing for MCSE certifications. Could you please let me know what is the difference between Netbios name and Host name. According to me WINs server will be used for Netbios Name resolution and DNS servers will be used for Hostname resolution. Both names specifies the machine name...

    Mraj270 pointsBadges:
  • Ethernet adapter question

    Hello, I have a laptop here that for some reason is sending out billions sometimes even trillions of packets it just keeps rising! I have reinstalled the NIC driver and tried a different NIC but the same thing keeps happening! I have also renewed the IP, flushed DNS, reinstalled the network stack,...

    Natethegreat0 pointsBadges:
  • Microsoft Windows 2000 server network administration

    My questions are stated thus: I want to know if it is possible to have a Windows 2000 server based network comprising of more than one master domain controller co-existing in the same network. If yes, how? And if yes,will a malfunction of any of the servers affect other servers? A network comprises...

    Ikekhuah0 pointsBadges:

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