Questions tagged [firewall]
Software that controls what connections can be made to and from a network.
2,587 questions
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Why can’t I access a local web server on computer 1 from local client on computer 2 without disabling the (public) Windows Firewall?
Computer 1 (Windows 10) and Computer 2 (Windows 11) and my phone are all connected to the same local network (192.168...). I'm trying to get Computer 2 and my phone to be able to access, via Chrome, a ...
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Why won’t pfctl load a configuration file in macOS Tahoe (26.1)?
I need to block incoming TCP to a certain port for a project. pfctl seems like the right option but so far I haven't had any luck. I'm frustrated with the vague "syntax errors" it's giving ...
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In Windows 11 firewall default setting, why are there two identical rules for ICMP, and what does (restrictive) in rule names mean?
I am currently looking into the default firewall configuration after a fresh install of Windows 11 Enterprise 25H2 with all available patches applied at the time of writing. There is no other software ...
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Does it make sense to put a router into Bridge mode for the purposes of using it with a hardware firewall?
I have a fiberbox and a router.
I want to put a hardware firewall in between the two, but when I power on the firewall, it doesn't have any WAN address, presumably because the modem isn't assigning it ...
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How to use nftables to accept connections on any port from a host with an established TCP session to a given port?
Using nftables, I want to create a rule that allows a host to connect to any TCP or UDP port if it already has an established connection to a specific TCP port.
So for example, remote host 1.2.3.4 ...
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Can't find DDNS on Fortigate
I'm learning Fortigate, using the free licence, which is limited, I guess. I want to configure DDNS, but I can't find it; usually, it should be on the DNS or in the WAN interface configuration page. ...
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How to find out which process to unblock in Lulu to allow Xcode to download a component?
I want to be surgical and allow only the rule/process or rules/processes that are blocking this download. I'm trying to avoid blanket disabling Lulu and then reenabling. There are too many Apple rules ...
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How to limit (firewall / iptable like rules) the network access that a rootless podman container has to the world and vice versa, without sudo?
I have a rootless Podman container that is going to run, from my Ubuntu user machine, some critical code that is security sensitive, has access to secrets within the container, etc. For security ...
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Does Android OS (as used on small laptops) have intrusion detection systems? [closed]
The goal is just to block network access except to specific programs (programs whose connections have known use), plus to list current sockets in use (to troubleshoot). The intended use is for Android ...
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Get rid of LocalSend entries in list of applications allowed through firewall?
I was trying to get LocalSend on my iPhone to connect with LocalSend on my Windows 11 laptop. When "Send" is selected on the laptop, it can see the iPhone's LocalSend, but the iPhone's ...
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Program in WSL cannot resolve DNS, given mirrored networking mode and the host's firewall blocking arbitrary Outbound connections
In Windows 11 24H2 (64-bit), Windows Firewall is configured to block arbitrary Outbound Connections. That said, any program that wants to access the Internet must be specifically added to the Firewall'...
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How to relax ufw rules to allow blocked requests with different IN and OUT networks
I have a DNS service that can't be reached for as long as ufw is active. I would like to find the most restrictive rule that allows instances to reach the DNS service. This is for a kubernetes cluster,...
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Firebase Subdomains
I am working with a team to implement Firebase in our Kotlin applications, but we are running into issues with configuring our firewall to allow the access it needs.
We are unable to add all of the ...
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The point of IP based firewall rules (in a zero trust environment)
As the question states; what is the point of firewall rules that target specific IP addresses? E.g. machine 192.168.10.1 on VLAN 10 is allowed to access machine 192.168.20.1 on VLAN 20. Both with ...
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Allowing inbound connections to run a Bitcoin full node [duplicate]
My system is Windows 11 with LAN connection to a Cambium R194W router. My Bitcoin node is running with 10 outbound connections but I can't seem to configure the system for inbound connections. What ...
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