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Forum: Networking

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

  1. Question One to One NAT with iptables does not work. Please help!

    Hello, I am trying to get a one to one NAT between two networks working on my Ubuntu 13.10 machine to no avail. The scenario is as follows. My...

    Started by DDRTC, 05-06-2014
    • Replies: 1
    • Views: 1,263
    06-11-2014 Go to last post
  2. RSTP / MSTP open-source library

    Hi, I would like to introduce you to my open-source RSTP/MSTP library: It's completely platform-independent C++. I...

    Started by adigostin, 06-09-2014
    • Replies: 0
    • Views: 4,227
    06-09-2014 Go to last post
  3. Question Meaning of gfp_mask in linux Kernel

    Hello, What is the meaning of the second argument in the `alloc_skb`, the `gfp_mask`?? And how does it value effect the allocation in the...

    Started by ha-as, 06-04-2014
    • Replies: 0
    • Views: 1,550
    06-04-2014 Go to last post
  4. Question Migrating a TCP socket and copying the contents of sk_buff for queues

    Hello, I am trying to migrate a TCP socket in listening mode from one server to another, to achieve this prupose I am copying multiple parameters...

    Started by ha-as, 06-02-2014
    • Replies: 7
    • Views: 1,713
    06-02-2014 Go to last post
  5. Question Linux Kernel lock_sock Function

    Hello, Can anyone tell me what is the purpose of using the function lock_sock(struct sock *sk) in the kernel space? And how does it effect the...

    Started by ha-as, 06-01-2014
    • Replies: 5
    • Views: 1,385
    06-02-2014 Go to last post
  6. [SOLVED] Cannot connect to router wirelessly after upgrading to wheezy

    After upgrading to wheezy, I am no longer able to connect either of my two wireless routers using the D-Link DWA-131 802.11n Wireless N Nano...

    Started by vialaspada, 05-27-2014
    • Replies: 6
    • Views: 1,465
    05-30-2014 Go to last post
  7. Issue setting up PPTP connection in the console

    Os: Fedora LXDE In the chap secrets file I have the following: Domain\Username Ipaddress Password * In the options.pptp file the only...

    Started by rpiper, 05-29-2014
    • Replies: 3
    • Views: 2,771
    05-30-2014 Go to last post
  8. Question Data structure for TCP packet in linux

    Hello, I want to know which header file in Linux contains the structure of the TCP packets i.e. the data type definition of the tcp packet struct....

    Started by ha-as, 05-26-2014
    • Replies: 9
    • Views: 2,391
    05-28-2014 Go to last post
  9. How to discover more about what doing an IP connection

    Hello, on openvz server are virtual machines and when i see there is example 300 connections of one IP and 700 connections another IP via netstat...

    Started by postcd, 05-27-2014
    • Replies: 0
    • Views: 443
    05-27-2014 Go to last post
  10. Question TCP/IP stack data structure in the Linux kernel space

    I am trying to understand the implementation of TCP/IP stack in the linux kernel space. And I came across multiple-thing which I am not sure about. ...

    Started by ha-as, 05-23-2014
    • Replies: 2
    • Views: 1,158
    05-23-2014 Go to last post
  11. Any good, free VPN's for Linux?

    I'd like to set up a VPN for those times when I'm out and about and want to connect to the interweb with my laptop through a public wifi. I've read...

    Started by TNFrank, 05-02-2014
    • Replies: 8
    • Views: 1,922
    05-22-2014 Go to last post
  12. Set up port forwarding

    Hi all, Host Ubuntu 12.04 desktop 64bit Guest Ubuntu 12.04 LAMP/desktop 64bit VirtualBox 2 NICs Optic Fibre Broadband connection - interface...

    Started by satimis, 05-21-2014
    • Replies: 0
    • Views: 618
    05-21-2014 Go to last post
  13. Command line monitoring, mtr like but ongoing

    Thanks for looking. I am looking for a new command line tool to add into my Linux arsenal of trubleshooting. I often monitor LAN/WAN traffic...

    Started by toolpusher, 05-07-2014
    • Replies: 5
    • Views: 1,648
    05-20-2014 Go to last post
  14. Very slow loading for large webpages

    This is a problem that affects both my Ubuntu and Mint partitions, but not the win7 partition on this box. General browsing works okay, but things...

    Started by HELLen76, 05-19-2014
    • Replies: 1
    • Views: 707
    05-19-2014 Go to last post
  15. NAT64 with TAYGA and Linux Ubuntu

    I had tried to configure a NAT64 Linux Machine The settings was, two ethernet cards. eth0 was assigned with IPv6 and eth1 was assigned with...

    Started by methodman3130, 05-19-2014
    • Replies: 0
    • Views: 1,806
    05-19-2014 Go to last post
  16. How can I map multiple ports into one ?

    I'm using an RTSP server on Linux that opens a pair of ports each time there's a connection request. The problem is that it dynamically chooses that...

    Started by NewtownGuy, 05-09-2014
    • Replies: 9
    • Views: 2,284
    05-11-2014 Go to last post
  17. Exclamation How to redirect packets using iptables

    I am new to iptables. I have a 2 virtual machines. VM1 - I1,I2 (2 interfaces,, VM2 - I1,I2 (2...

    Started by Shivaramakrishnan, 04-29-2014
    • Replies: 1
    • Views: 981
    05-06-2014 Go to last post
  18. [SOLVED] Changed a file, now synaptic is downloading at 1kbps?

    Folks: The other day I changed a config file because some updater in my system was burning up all my bandwidth. I set it to 1kbps and now synaptic is...

    Started by kcredden, 04-30-2014
    • Replies: 3
    • Views: 1,039
    05-04-2014 Go to last post
  19. tc - simple bandwidth limiting script

    We have a 42 mbit 4G connection (17 mbit in real), but if we exceed 40 GB per month we are kicked down to 384kbps for the rest of the month. Last...

    Started by dotpointer, 05-03-2014
    • Replies: 0
    • Views: 2,043
    05-03-2014 Go to last post
  20. How to make SSH server listen to connections?

    Hello, an server in the internal network LAN which dont have any public IP. How to achieve any computer from internet can conenct its SSH without...

    Started by postcd, 05-02-2014
    • Replies: 3
    • Views: 1,018
    05-03-2014 Go to last post

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