Collaborate Disseminate
Let’s assume we have an example machine connected to the internet. This machine is typically a client one, and it has no services like ssh running on. Does this kind of machines need any firewall to restrict incoming connections? On the on… Continue reading Do machines without any listening services need a firewall to block incoming connections?
I am trying to set up a pihole as a domain name resolver on my router running OpenWrt.
Currently I am running this iptables-script to force every device in my network to use my (pihole-)dns server (as far as possible at least):
iptables -t… Continue reading "if source == <IP> unless destination == IP"? [migrated]
We need to find port on a server and read info from this port. If we will try to use nmap here – we will be banned. Because iptables config, that blocks scans. What nmap flags can we use for finding this port and not be banned?
first port … Continue reading Scan nmap through iptables restrictions [closed]
Many tools in Linux allow for checking things as a non-root user. For example, at any time, I can check whether a service is running:
$ systemctl status ntp
However, the iptables needs to be used as root whatever the option. I’m wondering… Continue reading Why is the -L (list) option of iptables not available to non-root users?
So I followed this guide to route only one Linux user through my VPN:
https://www.cadman.uk/2011/08/28/making-all-network-traffic-for-a-linux-user-use-a-specific-network-interface/
It works and the user successfully gets routed through the… Continue reading OpenVPN/NetworkManager "route-nopull" creates connection delay
My server is under attack on an specific port but I am confused whether is a DDoS attack or a DoS attack (if it requires a botnet or is using some kind of trick). The entire server is available (website, SSH, SMTP, etc…) except the port … Continue reading How do I differentiate a DDoS attack from a DoS attack?
One commonly used iptables rule for Linux servers is this:
# iptables -A INPUT -i lo -j ACCEPT
Can we assume that this rule will only accept traffic which is sent from the local machine?
Is it possible for a remote attacker to craft a pac… Continue reading Is interface spoofing possible?
I want to use a firewall to protect my device from hackers and RATs. What are the most effective rules to use when configuring a firewall – other than blocking everything and not connecting to the internet at all?
I have AFWall+.
Continue reading How to maximize security against hackers / RATs using a firewall? [closed]
I need to add extra security to my Android device using iptables and a firewall to defend against hackers. My specific goals are to prevent a hacker from remotely breaking into my device to begin with and, in the event spyware is remotely … Continue reading How should I configure my firewall using iptables commands to defend against hacking?
I have set up a VPN client and I’m using iptables to block all connections not tunneled through the VPN. An example of the iptables rules I am using can be found here.
Unfortunately with this configuration RStudio does not start up.
In fac… Continue reading Is it safe to set up your firewall to allow localhost to accept incoming connections?