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Forum: Networking

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

  1. [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, 3 Days Ago
    • Replies: 1
    • Views: 263
    3 Days Ago Go to last post
  2. 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, 1 Week Ago
    • Replies: 3
    • Views: 516
    5 Days Ago Go to last post
  3. 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, 2 Weeks Ago
    • Replies: 5
    • Views: 1,161
    2 Weeks Ago Go to last post
  4. 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, 2 Weeks Ago
    • Replies: 1
    • Views: 374
    2 Weeks Ago Go to last post
  5. 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, 2 Weeks Ago
    • Replies: 4
    • Views: 270
    2 Weeks Ago Go to last post
  6. 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, 3 Weeks Ago
    • Replies: 0
    • Views: 217
    3 Weeks Ago Go to last post
  7. 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, 3 Weeks Ago
    • Replies: 1
    • Views: 332
    3 Weeks Ago Go to last post
  8. 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, 3 Weeks Ago
    • Replies: 0
    • Views: 251
    3 Weeks Ago Go to last post
  9. 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, 3 Weeks Ago
    • Replies: 2
    • Views: 402
    3 Weeks Ago Go to last post
  10. 3 public servers: middle machine for traffic forwarding

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

    Started by ipdm, 11-29-2017
    • Replies: 2
    • Views: 446
    3 Weeks Ago Go to last post
  11. 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: 2,102
    3 Weeks Ago Go to last post
  12. 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, 4 Weeks Ago
    • Replies: 2
    • Views: 867
    4 Weeks Ago Go to last post
  13. 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, 4 Weeks Ago
    • Replies: 1
    • Views: 667
    4 Weeks Ago Go to last post
  14. PPPoE Remote Address

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

    Started by iamausername, 11-28-2017
    • Replies: 2
    • Views: 3,516
    11-30-2017 Go to last post
  15. 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: 1,279
    11-22-2017 Go to last post
  16. 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: 2,504
    11-10-2017 Go to last post
  17. 1 VPS with 2 IP addresses. How to make them independent?

    I have this in /etc/network/interfaces: auto ens3 iface ens3 inet static address netmask ...

    Started by Douro, 10-27-2017
    • Replies: 0
    • Views: 1,059
    10-27-2017 Go to last post
  18. Question NtopNG Alert "Probing or server down"

    Hi, Recently I installed NtopNG 2.4.170403 - Community Edition. I found nearly 8000 alerts in the warning category and most of those indicate...

    Started by amithad, 10-25-2017
    • Replies: 0
    • Views: 736
    10-25-2017 Go to last post
  19. Question iptables nat pool binding

    Hello everyone, I am using linux box as router, I have SNAT with pool of public ip addresses. clients are having issue when some connections are...

    Started by waranty92, 10-18-2017
    • Replies: 1
    • Views: 1,255
    10-19-2017 Go to last post
  20. Gibberish when distributing files on cluster using torrents

    Hi all, I am running Ubuntu 16.04.1 LTS 64bit on a cluster and I need to be able to distribute large files on that cluster. My idea was to...

    Started by Dbugy, 10-05-2017
    • Replies: 1
    • Views: 1,744
    10-06-2017 Go to last post

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