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Questions tagged [firewall]

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A Firewall is an application or hardware device used to inspect and filter network traffic.

4,319 questions
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52 views

I am running a pfSense firewall (2.8.1-RELEASE, FreeBSD 15) hosted on a cloud VM. I have configured an OpenVPN server to allow remote users to connect from multiple geographically distributed sites. ...
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1 answer
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I'm running dedicated game servers on my homelab. Many of these servers communicate with multiple ports on the same protocol (for example, Conan Exiles uses tcp/7777, tcp/25575, udp/7777, udp/7778, ...
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We have a domain controller being fixed and is having caused some down time due to hardware failure. Because of this accessing A/D and Group Policy can take up to 30 minutes to load. Is there a way ...
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I'm attempting to use a WireGuard tunnel to connect to PostgreSQL. WireGuard settings: Server: wg0.conf [Interface] Address = 10.8.0.1/24 SaveConfig = false ListenPort = 51820 PrivateKey = <...
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1 answer
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I have a Linux host running several LXC containers. I am managing the firewall with UFW. I have the following situation: I cannot reach a remote mail server on ports 25, 993, 465, or 587 from any of ...
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0 answers
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Recently I was working with the AWS firewall and I had a problem bypassing the whole firewall, the configuration is: stateless group: rule_1 : if the destination is <work_load_subnet> -> ...
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1 answer
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I wrote a server in C running on Windows using network sockets. The client connects to the server using the server public IP address. When I attempt to connect from the client, the connection times ...
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I'm looking for a reliable, repeatable way to confirm whether a website is actually down, or if the issue is caused by access restrictions rather than a service outage. Typical scenarios I've ...
Score of -1
1 answer
707 views

I'm configuring HTTP/3 on Nginx setup: server { ..... ## Enable HTTP/2 listen 443 ssl; http2 on; ## Enable HTTP/3 listen 443 quic reuseport; http3 on; add_header Alt-Svc 'h3=":...
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1 answer
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My question is what are the reasons for the firewalld systemd service to be masked on a remote VPS running Fedora Linux v41? The OS image came from the VPS provider. Is it possible that they mask it ...
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A CDS can be used to mediate information flows between two security domains, where such mediation needs to be more tightly controlled than what a firewall can offer. This is typically between the ...
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I'm looking to clamp down on my IoT devices, so I've put most of them in an IoT zone and network. Right now the IoT to Gateway policies allow mDNS and all traffic. Looking at the Zone Matrix, the ...
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1 answer
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I'm exploring how to control or restrict file attachments and file transfers at the VPN level, using WireGuard or OpenVPN, to prevent users from uploading or downloading certain files while connected ...
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2 answers
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I can't get any of my PFSense firewall rules to block anything. As an example, I am tryin to prevent all traffic from the LAN subnet from communicating with the 10.0.2.0/24 network. This screenshot ...
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When running vagrant up, it gets stuck at the point when it's trying to mount the NFS shared folders. https://github.com/hashicorp/vagrant/blob/f2960d545864e1b644fe7fb0f3b82fec9895dd13/website/content/...

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