1. hal_sk

    Firewall basic settings

    Hello, I run VPS with public IP with mail and web server on it. I have heard it might be good idea to set up a firewall. So I did these ufw settings, hoping, it will only allow ssh, mail and web related ports. And then rebooted VPS. Status: active Logging: on (low) Default: deny (incoming)...
  2. V

    [SOLVED] USB Hub issue

    I have a USB 3.0 4-port hub attached to my desktop PC. When I try to plug in more than one USB drive, my system freezes. More specifically, I should say, my keyboard and mouse freeze. If I remove all but one USB drive, the keyboard and mouse function as usual. The hub is plugged in to a rear...
  3. D


    Hi. My previous employee setup my office server using BYOBU. After installing a template in my ERP system (hosted on the server), I can no longer access the ERP system via our web portal AND our external backup system now fails as well. I have received email notification from the server that the...
  4. Feriman22

    Portscan Protection

    Hi, based on this solution I wrote a shell script, which is blocking port scanning, so nobody can find (or much more slowly) your "hidden" SSH or FTP port The protection based on built-in firewall. The script stored on GitHub: Portcan Protection I hope you find it useful! Best Regards, Feriman
  5. Nemesis

    Adding program rules to ufw application.d open ports to ALL apps?

    Hi all! I've been looking around for a solution to specify ufw firewallrules for a specific program. I found out that using the applications.d should do the trick. However, upon adding the rules to the firewall, the firewall opens the port for all applications, not only the one I specified...
  6. Nemesis

    Blocking all outgoing ports not allowed?

    Hi all! I'm trying to block all outgoing ports, so only my VPN client can access the net. No, I'm not using the terminal, I'm running Linux Mint 19.2, and the firewall gui. However, the firewall don't accept the ports (see screenshot) I can't press the add button, since it's grayed out. There...
  7. J

    Router only supports IPv6 port forward but users need IPv4

    Hello there, I currently have a TCP-Server on my local machine. I got an IPv4 and an IPv6 address on this Machine. But my Router only supports IPv6 Port forwarding. I tried that but 99% of the users couldnt connect because they only got IPv4 and the Server is IPv6. I tried "serveo" and "ngrok"...
  8. 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...
  9. P

    Where do i need to open port when using VPN? (torrent passive seeder)

    Hello, the torrent tracker i am part of says i am Passive kind of seeder and not Active and thus i can only connect Active peers not Passive. I read that it mean i need to open port. But i am not sure where i need to open it so i seek Your advise and possibly explanation why? Thank you This is...