Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [firewall]

Software that controls what connections can be made to and from a network.

0
votes
0answers
18 views

Firewall and VPN issue on Windows

I was looking for a basic firewall program for outbound blocking. The only feature I needed was a notification for any new outbound connection so I could choose to allow or block. The free "Windows ...
0
votes
0answers
32 views

Windows 10 Firewall - How to deny all outbound but allow only Windows updates?

Goals: Use only Windows 10 Firewall Block all outbound traffic by default Allow Windows 10 updates Limit which svchost services are allowed through My progress so far on a fresh install: Outbound ...
2
votes
1answer
31 views

How do I use Windows Firewall allow an application inbound/outbound access to ONLY a single IP?

How do I set up the built in windows firewall in a way that follows this logic... Allow ALL traffic to/from [Application] to/from [IP] Deny all OTHER traffic to/from [Application] . Essentially, ...
0
votes
0answers
20 views

Setup VPN in Windows to allow access to specific port

I have a VPN setup and it is working well. The server it is hosted on is not a DC. However, I need to allow a specific port (9443) on the VPN, and close it off when not on the VPN. I have an ipad ...
0
votes
0answers
18 views

Why is adding a loopback rule needed for internet to work when your iptables policy on INPUT is set to DROP?

I don't quite get why it's needed. Say you have the following iptables policies: INPUT (DROP) -m conntrack --ctstate ESTABLISHED -j ACCEPT FORWARD (DROP) None OUTPUT (DROP) Rules to allow 443, ...
0
votes
0answers
28 views

How to use Windows Firewall to block?

Can someone help me figure out how to use Windows 10 Firewall to block internet access of some programs? I have some portable apps and would like to understand how to block them from the internet. ...
-1
votes
1answer
18 views

iptables block but then allow to same destination

I have a RaspberryPi on my LAN with default policies of DENY for in/out/forward. I want to open outgoing to four IP-addresses and allow responses to come back, but not accept new connections from ...
-1
votes
1answer
59 views

Whitelist websites for specific user on linux?

Due to a child protection and safeguarding issue, I want to set up a restricted or limited account for a tech-savvy teenager to use. I would like to whitelist only specific websites (e.g. iPlayer and ...
0
votes
1answer
21 views

Network drive connection failed. Which app/service to unlock in my firewall?

I installed TinyWall firewall and now Windows 10 cannot reconnect the network drives. Which service is responsible for this?
0
votes
0answers
27 views

port 80 closed after port forward and firewall settings

Currently I'm having an issue that only somehow started to appear within the last day or so and nothing about my network setup changed that would cause these issues. I'm running a development ...
0
votes
0answers
16 views

random ports blocked on client's firewall when mounting nfs share - why?

Could you help me, how can I prevent this? Every time, when I mount an nfs share, I see 6-7 blocked packets in the client's firewall log. These packets come from and to random tcp ports, but they are ...
0
votes
1answer
28 views

Guest VM not having internet access through firewall VM

I'm doing the following network setup (first time with firewall) but it's not working, unsure where its going wrong. I have a Fortigate VM firewall port 1 IP 192.168.132.5 on vmnet8(NAT) in VMWare, ...
-1
votes
0answers
22 views

Can I specify an application that isn't currently installed for a firewall rule?

Essentially, We deploy machines to clients. I want to know if I can pass through a firewall rule for a program that isn't currently installed. At the moment, my preparation script does not work unless ...
0
votes
0answers
26 views

How to handle random attacks on my home router/services

It seems that I am being constantly targeted by foreign entities for various attacks. Unfortunately, it doesn't seem like my router, netgear r7800, has any "auto-ban" functionality to mitigate these ...
1
vote
0answers
13 views

Give access to CloudFlare IPs in iptables

I trying to DROP all requests except CloudFlare requests, and give SSH access to a certain ip. so I write this rules : iptables -P INPUT DROP iptables -P OUTPUT ACCEPT iptables -P FORWARD DROP ...
0
votes
0answers
37 views

Chrome 69 and 70 goes unresponsive after a while behind corporate proxy

Many users on OSX behind a corporate firewall report that Chrome will work fine for a while, then suddenly all URLS get an infinite spinner and eventually a Page Unresponsive popup. Force quitting and ...
0
votes
1answer
67 views

Windows Firewall Inbound Rule - Powershell Script

I'm trying to create a PS script that creates a Windows firewall rule, blocking the port "6672" for a certain .exe file on an INBOUND connection but lets me have the option to whitelist certain IPs. ...
0
votes
1answer
39 views

Restrict Chrome to using only a very small range of ports?

Is there a way to restrict Google Chrome to using only a very small range of Local Ports? Presently, Chrome is using a large range of high-numbered ports. I'd prefer to be able to more precisely ...
0
votes
0answers
53 views

How do I interrupt a UDP conversation from a remote client to a local server process on Windows

I have a closed-source piece of UDP server software running on Windows and I want to be able to ban any misbehaving clients, even if the server and client are already communicating. The protocol used ...
0
votes
2answers
45 views

Windows 10 won't respond to network requests

I'm having an issue where my Windows 10 PC won't respond to network requests. Windows 10 Pro Version: 1803 Steps: Setup my network with the Private profile Setup static IP on my local network Made ...
0
votes
1answer
58 views

VPS public ip is not browsable, Curl works on VPS but not on my desktop

Following command returns the correct response on my linux/centos vps terminal but not works on my personal computer terminal: curl http://x.x.x.x:1337/api/ or curl http://example.com:1337/api/ ...
0
votes
1answer
36 views

iptables rule for incoming from certain ip and port

I have 2 servers, one for web requests (I named it the web) and another one is for database (I named it the db). Both servers are CentOS 7. I want to make these rules in iptables: all request to db ...
0
votes
0answers
28 views

How to block sql server port only to don't allow to connect the sql server?

I tried to block SQL server TCP port 1433 in Kaspersky endpoint security 10 for certain range of user's IP. But I cannot block by that port number 1433. If I try to block all Inbounds for that ...
3
votes
0answers
38 views

How can I decide to accept incoming connections or not in MacOs firewall?

Searching for the keywords "accept incoming connections" in ran into questions asking how to stop the message box keeping to pop up. I would rather like to know, quite generally, why application ...
0
votes
1answer
33 views

Something somewhere preventing only one site (connect.media, doesn't matter if FQDN is used or not) from loading in IE on all computers

Unless I'm connected to a hotspot or using a proxy site, at which point the site loads in IE with no issues. This first made me think this was a network-wide issue, until I tested in Chrome and ...
2
votes
2answers
73 views

TP-Link Access Control targets

I want to configure an access control rule target on my TP-Link router (Archer C-7). I want a target I can use to blocks access to any Internet IP. I thought I could tell it "block IP address range 0....
0
votes
0answers
55 views

openVPN on AWS free tier via RoadWarrior - connecting, but no internet

My new home internet is too slow for a personal openVPN server for protecting myself when not at home, so I decided to use the amazon AWS free tier server I got a few months back and never did ...
0
votes
0answers
36 views

How to properly diagnose Windows 10 pro firewall not functioning

Ok, macOS / Linux native here on Windows territory and a bit lost. I'm helping a family friend upgrade to Windows 10. He has a company laptop that he was allowed to keep after his retirement. It had ...
0
votes
0answers
11 views

Windows firewall allow all except specific IPs

I'm trying to block specific ips from connecting to my service. Some poeple are attacking my services and I was hoping to automatically ban their IP when I detect the attack. Here is how I'm ...
0
votes
0answers
25 views

Cyberoam Installation - Cannot Reach server Error

I have downloaded the Cyberoam tar file and have extracted it using tar command in the location /home/ec2-user which created a directory "CyberoamLinuxClient"inside which there were two files "...
0
votes
1answer
43 views

Using Fritz!Box 3490 to forward external traffic to internal servers

I have a Fritz!Box 3490 along with 5 usable external IPv4 addresses provided by our ISP. The Fritz!Box is to replace our existing DrayTek 2925. One of five IP addresses is an MX; so we use that IP to ...
0
votes
1answer
97 views

Advanced Port redirection Windows Firewall

I need to redirect some ports on Windows. What i want is to messure the traffic on a specific port (445, SMB). My proxy runs on the same machine. The problem is i cant change the port 445. So my ...
0
votes
0answers
86 views

How do I block Windows 10 Guest VM from updating itself Linux Mint Host

I have windows 10 running as a guest OS in Virtual Box. As you know, this virus of an OS updates itself automatically and you can't disable this. How can I block the windows update servers from my ...
0
votes
0answers
29 views

W10 Firewall - Export list button does not work

I am in the process of hardening a Win10 image and I realized that when I try to lock down ActiveX in IE (localhost site), parts of the system are impacted and not working as expected. In fact inside "...
0
votes
1answer
15 views

Connecting to a VPN behind a NETGEAR WNDR3400v2

At my wits end here. I have a ZyXel VPN Firewall, which I can "VPN into" from the outside as long as it's connected directly to my cable modem. However I need the ZyXel WAN port connected to the LAN ...
0
votes
0answers
15 views

How to quickly know if an ip is blocked by the proxy server?

For example, if a computer(linux) in a company's network wants to connect to some websites like google.com in the internet, it needs to route the connection through a proxy server provided by the ...
3
votes
1answer
84 views

How to create inbound rule which only accept Local Lan in win7 firewall

I installed an application which will auto create an inbound rule in my win7 firewall settings, I want to make this rule only accept local lan but not remote addresses, for example, if my local IP ...
1
vote
0answers
15 views

About TS3 Ports, how to protect

Does someone know how to configure port 10011 (query), on internal network and close the port in firewall? And for port 30033 (filetransfer), Is it possible to configure it to its closed but it works ...
0
votes
1answer
40 views

How do I block ip using Norton Firewall

I need block all ip as described at this page using Norton: https://help.comodo.com/topic-72-1-451-4810-.html I mean how can I apply these settings: Rule 5 Action : Block (Also select the ...
0
votes
0answers
62 views

How to force to show all notifications of MS Defender Firewall via GPO?

I am preparing a set of GPO to harden W10. I enabled the Defender firewall blocking most of the connections but I also wanted to leave the notifications for helping me with the fine tuning of the ...
0
votes
1answer
16 views

Firewall with domain based rules for client

I want to set domain based firewall rules to a client (not all clients). Are there any firewall applications that support this? I basically want to be able block everything and add exceptions. With ...
0
votes
1answer
26 views

Allowing IP Ranges in McAfee Endpoint Security

I have "McAfee Endpoint Security" on my Windows 10 box. And I have "Oracle VM VirtualBox" installed on the same machine and the VMs used to get the following IP Range 192.168.1.0/24 I see "McAfee ...
0
votes
1answer
155 views

Cannot access nextcloud home server behind pfsense firewall, via ddns (no-ip, pfsense, ExpressVPN)

Having some trouble setting up access to a nextcloud server on my local network. Feeling a bit lost tbh. I want to access the server from outside the local network i.e. internet. The server is ...
0
votes
1answer
19 views

What terminal command can I tell Mac OS X:s software-firewall to block all incoming connections?

I want to script the turning on and off of the "block all incoming connections"-function of the built-in firewall in OS X. What terminal-command would achieve this? I'm not talking about sudo ...
2
votes
1answer
138 views

Getting a UDP-only VPN to work over TCP

For a project of mine, I'm searching for possibilities to have a UDP-only VPN working over TCP (preferably on port 443 or 80). I have found the following while doing some research: This is possible ...
1
vote
2answers
118 views

Cannot ping OpenVPN server from different subnet

I have a cloud OpenVPN server and my goal would be to be able to access my home network from OpenVPN clients connected to this server. Currently, I have an OpenWRT router that is a OpenVPN client ...
0
votes
0answers
40 views

Vultr Firewall - Accept CURL requests from one IP only

I have set up a web server on Vultr: IP: 198.13.xx.xx and I want to allow my other webserver https://myotherwebserver.io to pull information from it via curl - but everyone else should be blocked at ...
1
vote
1answer
44 views

How to block all traffic on Win10 except for 2 programs

I have win10 Pro on a offline computer. I have a Synology NAS. So, I have the internet cable plugged in and have everything except for port 5000 (the NAS) disabled. Therefor no internet, no ...
0
votes
0answers
53 views

IPv6 firewall configuration

For the life of me I can't figure out how to configure a firewall to correctly use IPv6. First, let me explain my setup. I have created a small test environment in order to play around with IPv6 and ...
-6
votes
1answer
58 views

ACL commands for allowing HTTP [closed]

Practice COMP Tia networking exam: Question 286 A network technician wants to allow HTTP traffic through a stateless frewall. The company uses the 192.168.0.0/24 network. Which of the ...