networking

  1. happy.blackcat

    Connecting to a VPN breaks the internet?

    It seems that when this happens a restart of some sort of network service is restarted which resets the DNS server used in resolv.conf This is honestly it's own issue that probably is a simple fix, and while help would be greatly appreciated with that issue, that's not really the reason this...
  2. I

    Cloned Lubuntu 18.04 VM - can't edit network connections after changing IP address

    I cloned a Lubuntu 18.04 VM (running on ESXi). When I booted the cloned copy I edited the network connections (using the network menu in the lower right corner of the screen) and changed the IPV4 IP address so as not to clash with the original VM, then rebooted. Now I am unable to edit the...
  3. S

    Different networks communicating with each other?

    i have 4 Ubuntu 20.04 VMs running on VirtualBox. Each Ubuntu has 4 network adapters which i have added, they are all in bridged connection. My goal with this ideea is to have different networks such as (10.1.1.10/24 or 20.2.2.20/24 ore 30.3.3.30/24) on each interface so that VM(1,2,3,4) has 3...
  4. T

    Ethernet not working, since updating and rebooting

    Suddenly my ethernet stopped working, i didn't touch anything, just updated, upgraded and rebooted, the cable is ok i tested it on my pc and the ethernet works, also ethtool says the link is up and detected, i have no idea what's the problem?, any help, also set static ip 2 weeks ago worked fine...
  5. A

    How to unblock wlan1 softblocked problem. wpa_supplicant problem. Please help

    I am currently using a Acer Aspire one netbook. The OS I am using is AntiX linux. I am using an external wifi dongle to connect to the wifi. The drivers for the dongle were already present in the OS and it was successfully detected. I went to the 'CENI' application to connect to the wifi. I...
  6. T

    Hot spots

    Hello everyone. I solved my issue on my own but I’m also curious as to why it is the Way it is. Why when I create a hotspot with the Mx Linux create a hotspot tool, does it not let some devices connect. I created/ deleted multiple different hotspot profiles within the edit connections tab. Some...
  7. T

    Acidentally deleted ethernet connection, now it doesn't detect it anymore

    So basically i have a orangepi3 which is running armbian buster which is based on debian, and i recently moved it to a different location and used a different ethernet cable, on my main pc i got 100 mbps, but on the orangepi only 10mbps, after hours of troubleshooting i realized that there is a...
  8. T

    Newb with some questions!

    Backstory: So I have an older Lenovo laptop; currently running Windows 10. It could be much faster and better if it had a Linux OS on it. I have my Associates in Computer Networking and we used Kali in school and so I have a basic and general understanding of Kali and Linux. Question: I have...
  9. D

    Question related to TCP/IP buffering in linux

    I have been trying very hard to find about buffers used in TCP/IP as part of packet transfer in linux. More i read, more i get confused. Below given are questions i have. Can someone help me figure it out? 1)Is the driver queue which is implemented as a ring buffer with descriptors pointing to...
  10. O

    Subnetting

    Hi, i use a linux ubuntu like a gateway/firewall with iptables with 3 eth, in one (Lan eth) i configure a eth for working with a subnetting and adding two ip on the eth: 192.168.6.1/25 and 192.168.6.129/25. In a linux host i can navigate, in some host i configure one segment of subnetting and in...
  11. LinuxTux23

    Can i use a PXE Server without a build in DHCP ?

    Hi, I wanna setup an PXE Server in ym Network. In my network is allready a DHCP Server running and i dont wanna turn it off. So now i want to ask you, if it is possible to use the existing DHCP Server in the network and dont install one on the PXE Server. Thank You ! LinuxTux23
  12. P

    Entering terminal commands with another terminal or a programm

    I want to try setting up a linux server that should host a minecraft server, now the console from the minecraft server is very important (in and output), so how could i get the in/output to another terminal window (like typing "send commandXYZ to minecraftConsole")? Is it maybe possible to do...
  13. I

    All ways and also Best way to find the number of openfiles in linux

    need possible ways and also the optimal one to find the curent number of openfiles in linux.
  14. I

    Does Linux count dropped packets in rx_packets and tx_packets?

    Good morning, I'm doing some network measurements with a program that collects data from the folder /sys/class/net/<if>/statistics. In my measurement program, I have a line of code stating that, in a 1 second reading, the rx_dropped and tx_dropped values cannot be higher than the rx_packets and...
  15. alex159753

    Wondering if you knew any CCNA Online Courses.

    Hello Guys, I recently signed up for the forum. My work requires for me to be updated since i am in networking. Soooo i thought this might be an interesting place to ask if anyone knows a good reputable Online course provider that provide CCNA Programmes?? Thank you in advance. Alex Walker
  16. joX9

    linux centOS networking problem!

    Hi everyone,recently I have a problem about centos: I installed minimal centos7 on the virtualbox and set up the network connection as a bridge, but I can't connect to the network in centos (eg ping, yum update...). But when I switch back to the NAT connection, I can actually connect to the...
  17. W

    Configuring CentOS 7 with two IP addresses on Same LAN

    Hello all, I have a CentOS 7 server with an Emulex OCE14102-NT card installed into one of its PCI slots. The card has two 10Gbps NICs with unique MAC addresses for each NIC. I am trying to configure each NIC with an address on a 172.16.20.0/16 network. I have disabled NetworkManager and...
  18. C

    dhcpcd crashes on Raspberry pi

    I'm using a RPi 3 (Stretch) to connect to the internet via a Verizon 4G/LTE USB 'dongle' (Pantech UML295) , which presents itself as eth1. On first power up, the Raspberry always hangs at 'A start job is running for dhcpcd on all interfaces (20s / 1min 42sec)'. At this point, the dongle...
  19. E

    U-Boot Environment Variables issue

    I am trying to network boot Linux via TFTP and so when it starts up it says on the console, "ipaddr not set". Yet when I print the variable ipaddr it shows the ip address as shown in the image. Everytime I change the u-boot configuration I have to issue the command, "env default -a" because...
  20. E

    Setting static IP address to UDHCP client

    I am using udhcp client for an embedded device. I am trying to add a feature to set a static IP, Netmask, DNS, and gateway address. I am trying to set it through the "-r" argument (request): /sbin/udhcpc -A 3 -f -s /tmp/udhcpc_wlan0_sh -i wlan0 -r 172.16.0.2 It does not seem to work. I try to...
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