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Forum: Networking

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

  1. Security remoting into a VNC server?

    Hi, I would like to VNC into my VNC Server (Linux Mint 18.3 Sylvia) from outside of my network SECURITY. Everything is working meaning I can...

    Started by finsfree, 11-09-2018
    • Replies: 0
    • Views: 1,355
    11-09-2018 Go to last post
  2. cmst broke my internet connection

    Today, out of sheer curiosity, I installed cmst application. It turned out to be a huge mistake. Because it was not useful to me, I removed cmst...

    Started by blnl, 10-10-2018
    • Replies: 1
    • Views: 1,002
    10-11-2018 Go to last post
  3. 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: 7,025
    05-07-2018 Go to last post
  4. 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, 05-02-2018
    • Replies: 0
    • Views: 1,142
    05-02-2018 Go to last post
  5. 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: 1,466
    03-10-2018 Go to last post
  6. 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: 1,018
    03-08-2018 Go to last post
  7. [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: 1,119
    02-14-2018 Go to last post
  8. 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: 1,330
    02-12-2018 Go to last post
  9. 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: 2,005
    01-31-2018 Go to last post
  10. 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: 986
    01-30-2018 Go to last post
  11. 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: 1,024
    01-28-2018 Go to last post
  12. 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: 760
    01-27-2018 Go to last post
  13. 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: 884
    01-26-2018 Go to last post
  14. 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: 783
    01-26-2018 Go to last post
  15. 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: 1,052
    01-25-2018 Go to last post
  16. 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: 1,060
    01-24-2018 Go to last post
  17. 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: 2,845
    01-24-2018 Go to last post
  18. 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: 1,513
    01-19-2018 Go to last post
  19. 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: 1,258
    01-14-2018 Go to last post
  20. 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: 4,221
    11-30-2017 Go to last post

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