Windows firewall and ports – Information Security Stack Exchange

Windows firewall and ports – Information Security Stack Exchange

Is it good practice to disable firewall rules for vulnerability scanners?

I’ve been asked to ensure that our vulnerability scanning tools (like Qualys, Nexpose) are able to reach all of our AWS EC2 instances, on all ports and protocols.

Today they are limited by the current security groups (which generally allow either no traffic, or well-defined protocols such as HTTPS). We could implement a new security group scope to the CIDR range in which the vulnerability scanning engines reside, allowing the range unfettered access.

I don’t believe this is a good idea. Is there any official, written guidance (by a well-respected authority) making the case one way or the other, for disabling network, port and protocol filtering to allow vulnerability scanners full access?

domain name system – Ubuntu Firewall blocking DNS requests to VMWARE guest

I can ping to google DNS but cannot resolve after turning on the host ufw.
Tried searching everywhere and updated ufw and iptables accordingly to allow DNS queries and allow established connection.

My numbered ufw status related to DNS is

Screenshot UFW rules

Note: vmnet 1/,, eno4 Host public interface.

The strange thing is when I turn off the host ufw, everything works perfectly on guests side. However, I am able to ping any IP addresses even after turning on the firewall.

cloud – Network with Firewall Cisco Packet Tracer

cloud – Network with Firewall Cisco Packet Tracer – Stack Overflow em Português

security – How can I stop the macOS firewall from blocking Django server (Python)?

For several years I have been regularly using Python’s Django framework and running its web server for development purposes on my local machine. I took a break over the past year and am now returning to Django after upgrading my Mac to Big Sur in the interim. However, the firewall is now blocking my Django server and I can’t figure out how to fix this.

I have verified that the firewall is indeed the issue. If I try to issue a request to the Django server from another computer on the network, the request will time out if the firewall is active. If I disable the firewall, the same request will succeed.

I have gone into System Preferences -> Firewall -> Firewall Options. The python binary from my project’s venv/bin directory was added to the list in Firewall Options and had Allow Incoming Connections enabled. I tried removing it from this list as well, in the hopes of forcing a new system prompt to allow incoming connections, but that has not worked and now python is not listed under the Firewall Options list of applications. I cannot add it back into the list either.

I’m at a bit of a loss for what to do here. It used to work fine, but since updating my macOS version, something has been changed that is causing the firewall to block incoming connections to the Django server.

network – Macbook Pro doesn’t accept any incoming connections – Firewall disabled!

My MacBook Pro running macOS Big Sur 11.3.1 doesn’t respond to Ping, SSH, and Remote Access.

What I tried so far:

  • Made sure “stealth mode” was disabled on Firewall
  • Disabled the Firewall entierly
  • Resetted all network configurations (removing plist files on /Library/Preferences/SystemConfiguration/)
  • Removed the Wi-Fi adapter and re-added it
  • Removed any VPN apps (wireguard)
  • Updated to the latest macOS version

It can access all devices on my local network, but no devices can access it.
I have no idea what else I can try.

Here’s my files under /Library/LaunchDeamons/, if it helps:

com.nomachine.uninstall.plist -> /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Resources/
org.virtualbox.startup.plist -> ../Application Support/VirtualBox/LaunchDaemons/org.virtualbox.startup.plist

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do you use any firewall or waf to protect your billing system and client sites ?


do you use any firewall or waf to protect your billing system and client sites ?… | Read the rest of

Firewall Considerations, renewals/replacement

HI Everyone

We’ve been using Fortigate for years and i feel like its time to upgrade the hardware to something newer and more powerful, w… | Read the rest of

malware – Router firewall ICMP risks and threats?

I have found out, that my Router firewall has never blocked ICMP traffic.

There is a lot of opinions online regarding ICMP, and whether it should be disabled or limited.

So far I have found out, that it can exploited to monitor network traffic / I/O traffic (man-in-the-middle).
It can also be exploited to carry and infect a PC system with malware.

My questions / worries are:

If someone monitored my network traffic using ICMP, would HTTPS traffic then still be encrypted / unreadable?

Would my Windows Defender firewall block an attack / attempted malware infection via ICMP?

Would Malwarebytes (example) scan detect, if my PC system had been infected by malware via ICMP?

  1. Are there other ways someone can access my PC system using ICMP, besides via malware infection?

Thanks in advance for your answers
And happy weekend!

Best regards

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