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Forum: Networking

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

  1. internet access with ping has 100% loss

    I have at home the following setup: Internet - NAS (Ubuntu 16.04.4 LTS) - LAN (Asus N56U wireless router) - family users NAS connects using pppoe...

    Started by adrhc, 05-07-2018
    • Replies: 0
    • Views: 1,035
    05-07-2018 Go to last post
  2. Question ARP command won't show MAC from vlan's.

    Hi people. This is my layout: Me --> LAN 192.168.2.0/24 VLAN10 -> 192.168.10.0/24 My firewall allow me to reach my vlan. I use...

    Started by klabacita, 05-01-2018
    • Replies: 0
    • Views: 535
    05-01-2018 Go to last post
  3. iptables problem need to be solved,thanks for any reply.

    When I use libnet library create and send a packet which look like below,why my iptables cann't receive such format data? How can I fix this problem?...

    Started by eHeaven, 03-10-2018
    • Replies: 0
    • Views: 1,112
    03-10-2018 Go to last post
  4. delete, empty

    Hello, on ubuntu 16.04.4 my default iptables 1.6 policy for the INPUT & OUTPUT chain is DROP and i would like to add ACCEPT/ALLOW rule for local LAN...

    Started by postcd, 03-07-2018
    • Replies: 2
    • Views: 543
    03-08-2018 Go to last post
  5. [SOLVED] Routing Help

    Hey experts.. I have an appliance here that seems to run on CentOS/RedHat linux. I have a weird routing issue. We sit on a network with two...

    Started by MikeLinuxFan, 02-14-2018
    • Replies: 1
    • Views: 738
    02-14-2018 Go to last post
  6. NTLMv2 Response

    Hello, I captured some network packages with tcpdump and wrote it to a pcap file. Is there a way to extract the SMB2 packages with the "NTLMv2...

    Started by Bit-Devil, 02-09-2018
    • Replies: 3
    • Views: 868
    02-12-2018 Go to last post
  7. Exclamation How to block access to all ports and open access only for certain in i

    How to block access to all ports and open access only for certain in in iptables? I watched the instructions on the Internet, but I do not have...

    Started by LinuxerGeek, 01-28-2018
    • Replies: 5
    • Views: 1,508
    01-31-2018 Go to last post
  8. what is promiscuous mode and why its useful in switched LAN?

    i have read about promiscuous mode, it states in most places that it lets a NIC process frames that have a different MAC dest address than the one...

    Started by askobilv, 01-29-2018
    • Replies: 1
    • Views: 638
    01-30-2018 Go to last post
  9. VNC over Reverse SSH/Bridge?

    TL;DR: I need to circumvent a firewall for VNC access for vendors. I have a wifi connection and a Linux box. How do I do it? So, I have a network...

    Started by oguruma, 01-28-2018
    • Replies: 4
    • Views: 570
    01-28-2018 Go to last post
  10. Adding an interface to a bridge stops traffic

    Hello. If I create a bridge and add an interface to it, all traffic stops on that interface. I have a little script that reproduces the issue...

    Started by oceanic, 01-27-2018
    • Replies: 0
    • Views: 437
    01-27-2018 Go to last post
  11. iptables, ctstate RELATED not working

    Hellow, fallow i trying to configure my Kali iptables for active and passive FTP this is my script: #!/bin/bash iz=eth0 ip=`hostname -I` ...

    Started by janzawadkadrum, 01-26-2018
    • Replies: 1
    • Views: 554
    01-26-2018 Go to last post
  12. blocking access to a network on HPE switch

    hi all, i have a HPE switch and i have telneted in and i want to know the command(s) to block access to a network, so all other networks cant...

    Started by robertw, 01-26-2018
    • Replies: 0
    • Views: 479
    01-26-2018 Go to last post
  13. H3C wireless module - adding ACL rules

    hi all, got a H3C wireless module and i want to create an ACL rule so one network cant talk to another network, is this possible to do so i...

    Started by robertw, 01-24-2018
    • Replies: 2
    • Views: 659
    01-25-2018 Go to last post
  14. 3 public servers: middle machine for traffic forwarding

    With the following machines... Server 1: PPTP client windows; Public IP: 1.1.1.1 Server 3: PPTP server centos6; Public IP: 3.3.3.3 Connecting VPN...

    Started by ipdm, 11-29-2017
    • Replies: 2
    • Views: 689
    01-24-2018 Go to last post
  15. Is advisable block based on tcpdump Refused output?

    Hello, the DNS server can log denied DNS queries and i can use fail2ban or configserver firewall to ban IPs with excessive denied log entries, but...

    Started by postcd, 12-29-2017
    • Replies: 1
    • Views: 2,413
    01-24-2018 Go to last post
  16. No longer able to connect to server!

    Hello, Thanks for looking at my post, I'm in dire need of some help! I can no longer mount my network server drive on our Debian Print Work...

    Started by PCSportswear, 01-18-2018
    • Replies: 2
    • Views: 1,129
    01-19-2018 Go to last post
  17. Connecting 2 PC's over WiFi

    Hi,If there are 2 laptops, each with Wifi, is it possible to connect them so one can transfer files between em? Or even share peripherals such as...

    Started by resetreset, 01-14-2018
    • Replies: 1
    • Views: 930
    01-14-2018 Go to last post
  18. PPPoE Remote Address

    Ok, so i'm having a bit of an issue with my ISP. My linux firewall has an IP address of 10.0.0.1 I have internet in my building, provided by...

    Started by iamausername, 11-28-2017
    • Replies: 2
    • Views: 3,800
    11-30-2017 Go to last post
  19. SNTP Client

    For a project work in an ARM embedded device we need to write code that will sync time of device within that of the network. We plan to make use of...

    Started by uunniixx, 11-21-2017
    • Replies: 4
    • Views: 1,680
    11-22-2017 Go to last post
  20. How can I hide my ip address?

    I know there are lots of companies out there who provide software to hide ip's for anonymous browsing but I don't know which ones to trust - any...

    Started by Edwardorange1909, 11-03-2017
    • Replies: 6
    • Views: 2,863
    11-10-2017 Go to last post

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