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Forum: Networking

Help requests related to Linux networking: setup, configuration, internet connection sharing, iptables, etc

  1. Nearly full conntrack table, 60K lines

    Hello, im having CentOS (redhat) OpenVZ VPS and i do command: wc -l /proc/net/nf_conntrack sysctl net.netfilter.nf_conntrack_count &&...

    Started by postcd, 12-03-2015
    • Replies: 0
    • Views: 464
    12-03-2015 Go to last post
  2. Thumbs down NtopNG is Difficult to Install

    Hi, I tried installing ntopNG several time in different Linux platforms ( CentOS & Ubuntu ) but it failed. The least succesful installation on...

    Started by amithad, 12-01-2015
    • Replies: 0
    • Views: 415
    12-01-2015 Go to last post
  3. How to install Linux CentOS to be ready for datacenter housing?

    i would like to use CentOS 6.6, i see i can use ISO, netinstall for example. But im not sure how exactly i should install it so after it is plugged...

    Started by postcd, 11-29-2015
    • Replies: 1
    • Views: 545
    12-01-2015 Go to last post
  4. ARP request broadcast when using raw socket to send raw IP packets wit

    First, let me describe the problem briefly. I have to programs which send IP packets from a host( to another host( These...

    Started by esolve, 11-18-2015
    • Replies: 0
    • Views: 648
    11-18-2015 Go to last post
  5. on what conditions can tcpdump on a host capture packets which are not

    I have three laptops in a WLAN, A, B and C. A and C are using Wlan interface wlan0 but B is using Ethernet eth0,B is connected to the wireless router...

    Started by esolve, 11-12-2015
    • Replies: 1
    • Views: 646
    11-12-2015 Go to last post
  6. [SOLVED] dhcpd complains about a subgroup entry

    Internet cable via a Linksys AC1200 (EA6100) cable modem, then Tp-Link switch that supplies west side of the house. Off this same switch is a D-Link...

    Started by jkwilborn, 11-09-2015
    • Replies: 2
    • Views: 870
    11-10-2015 Go to last post
  7. Join Mint 17.2 to windows AD

    I done stages that guide on this article : but when I type : sudo kinit Administrator gave...

    Started by bookman, 10-18-2015
    • Replies: 2
    • Views: 1,993
    11-02-2015 Go to last post
  8. draytek - setting up IPsec client

    hi all, i cant for the life of me get this to work, i attach screenshots of what i have done for both routers, my authentication im using is...

    Started by robertw, 10-30-2015
    • Replies: 1
    • Views: 861
    10-30-2015 Go to last post
  9. routes for certain subnet

    hi all, in the screenshot below is my route table on our procurve switch atm all out networks are going out via our tmg router (

    Started by robertw, 10-29-2015
    • Replies: 0
    • Views: 530
    10-29-2015 Go to last post
  10. Destination unreachable (Host administratively prohibited

    I have a program which send TCP packets from laptop A to laptop B (there is a laptop C which acts as relay, and B send packets to C(

    Started by esolve, 10-28-2015
    • Replies: 0
    • Views: 1,023
    10-28-2015 Go to last post
  11. L2TP/IPsec - site to site tunnels

    hi all, i have set up L2TP/IPsec server on my pfsense (building a) and L2TP/IPsec client on my draytek router (building b) in building b on a...

    Started by robertw, 10-25-2015
    • Replies: 1
    • Views: 743
    10-28-2015 Go to last post
  12. port 25 can send/recieve outside but cant telnet from outside

    hi all, got a wierd problem, which i cant figure out i CAN send and recieve emails from roundcube webmail to my gmail and vica versa, its on a...

    Started by robertw, 10-22-2015
    • Replies: 2
    • Views: 641
    10-24-2015 Go to last post
  13. TCP connet: No route to host

    I started a tcp server on a host A and then start a tcp client on another host B. both hosts are in the same LAN via the wireless router at home....

    Started by esolve, 10-15-2015
    • Replies: 2
    • Views: 839
    10-18-2015 Go to last post
  14. no output when ping-ing a openvpn interface

    I'm following the tutorial to learn openvpn Tun/Tap interface tutorial \1 by following the steps of the part: `let's try it` I use openvpn...

    Started by esolve, 10-06-2015
    • Replies: 1
    • Views: 616
    10-09-2015 Go to last post
  15. Controlling traffic through 2 NICs

    Hello, I have Debian Linux with two wireless network interface cards. One of them is built in to the computer and is currently my wlan0. The other...

    Started by tekcap, 08-27-2015
    • Replies: 5
    • Views: 893
    10-07-2015 Go to last post
  16. Running Minecraft Server on Ubunut 15 ... and problems :(

    My son really wants to play Minecraft on the PC and we bought a book titled 'Adventures in Minecraft'. We've been able to get the Bukkit package...

    Started by thevaliantx, 09-18-2015
    • Replies: 4
    • Views: 1,083
    10-05-2015 Go to last post
  17. Question How to measure network latency to service without ICMP/ping?

    Hello, Do you know way to measure network latency of service which running on specific port number and all other traffic to the same server is...

    Started by Abadon, 09-29-2015
    • Replies: 5
    • Views: 2,684
    09-30-2015 Go to last post
  18. Routing Issue on KVM Server

    I installed a new KVM *slave* node in SolusVM using Centos 6.6 as the host O/S. I routed a /29 as primary on my Cisco switch and a /24 subnet as...

    Started by Bashed, 09-23-2015
    • Replies: 1
    • Views: 807
    09-29-2015 Go to last post
  19. [SOLVED] BIND Configuration

    Hello! I have a server which hosts a domain, I want to use my server as a nameserver, so I use BIND. The problem is that I do not know...

    Started by vanjo9800, 09-25-2015
    • Replies: 1
    • Views: 1,100
    09-27-2015 Go to last post
  20. ipsec (VPN) - Routing assistance

    I have this task to VPN to a Vendor Network using IPSEC. (IPVA / IPVB)=====+GWV1+-------+GW2A===== (IP2A / IP2B) I have successfully connected...

    Started by Grandmaster_B, 09-15-2015
    • Replies: 3
    • Views: 710
    09-22-2015 Go to last post

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