Questions tagged [firewall]
Software that controls what connections can be made to and from a network.
2,514
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Windows 7 Firewall stopped working after I changed permissions for the registry key SharedAccess
Today I've changed permissions for the registry key HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess (under which FirewallRules are stored) removing "Everyone" and "Users" in ...
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ping windows machine from remote server
I have a cloud remote server which runs ubuntu. From this server I am able to ping my local mac laptop, but unable to ping my windows desktop.
I have tried the following firewall settings on windows:
...
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2k
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How to allow specific program through Linux firewall?
I have ufw/gufw with the following rules:
Deny all incoming and also deny all outgoing.
Now I want to add an exception to these rules:
Let's say I have a custom web browser named MyBrowser and I want ...
2
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1
answer
572
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Why does my virtual machine (Debian on Proxmox) not respond to a TCP SYN of another VM even though it arrives?
I got a very strange problem and I am out of ideas to solve it. I hope anyone over here has a helpful idea.
Some info about the virtual machines:
VM0: Debian 10 - 192.168.10.102 [+ 2 more interfaces]
...
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338
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Can't port forward a minecraft server with my TP-Link router
I am trying to set up a modded MC server for me and my friends, and therefore i need to open my ports on my router.
I have spend hours, and feel like I've tried everything there is to try. I am using ...
3
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1
answer
1k
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How to have Windows firewall send RST packet for blocked port
Is there any way to instruct windows firewall to send Reset packets for a blocked TCP connection instead of dropping the packet?
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93
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Assigning static address to device via Cisco ADSM
(Tried asking this over in Server Fault, but they rejected it because -- despite the Cisco ASA usually being considered enterprise hardware -- they insist home networks are out of bounds. Sigh. My ...
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lftp hangs up on "connecting" when tried to use ACTIVE mode
I need to use lftp in active mode (due to some limitations on the server side). So I have set up the following ~/.lftprc config-file:
debug
set ssl:verify-certificate no
set ftp:port-ipv4 148.X.X.86
...
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1
answer
2k
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IPTables issue allowing queries to DNS server
I've been given a task to create a DNS server for a subdomain with a delegated DNS zone. I did test the zone file and using the dig tool, I can confirm it is working when called for localhost and the ...
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4
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How to fix my localhost resolution on Windows?
I was developing a simple react app and wanted to test it on my phone. For that every time I do npm start it runs a react-scripts module that launches the browser to show the project you're doing as ...
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1k
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Mikrotik Firewall rule to drop everything
I would like to make rules that will allow traffic only from certain mac addresses, and drop everything else. Do you have any ideas? I have tried /ip firewall filter add action=drop chain=forward But ...
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Issues with ARP I think? And bridged interface
I work with a large school district network. We are having issues with our content filter associating all IP addresses to the same MAC address (the gateway MAC address). I have the content filter in ...
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624
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Allow Local Computers to Access Any Port in Windows Firewall
I want to enable any computers on my local network to connect to each other directly. I had to use this command in PowerShell to add a new rule to the receiving computers:
New-NetFirewallRule -Name ...
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159
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Port Address Translation strange behavior: port 80 appears to be open from outside but outside connections do not work
This is my configuration:
Host machine: Windows 10 X64 21H2 (i7 + 64GB ram)
Hypervisor type 2: VMWare Workstation 16.2.4
Guest machine: Windows 10 X64 21H2 (16GB ram)
Modem/Router: Livebox Fibra (ISP ...
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0
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447
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nftables or fw4 issue with timebased traffic rules
Since the OpenWRT ver > 22.3 does use NFTABLES instead of IPTABLES
I got issue with some firewall (fw4) time based traffic rules that I
have no idea how to solve them.
The firewall rule is as ...
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answers
466
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How to configure Filezilla server on an Azure VM?
I want to create a Filezilla server on Azure VM. And for that I have configured basic settings on the server. And now I'm successfully able to connect to the server via local network (If I test on the ...
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1
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1k
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How to delete Windows Firewall Rule when Firewall Services are disabled
We were trying to add IP addresses to Inbound rules of Windows 2012 firewall to a ban list to stop hackers from accessing the remote desktop. This system is a dedicated hosting server and is only ...
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1
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541
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Leverage stateful UDP firewall for Wireguard servers in NATs
I have a "client-server" setup composed of one Wireguard server computer and one client, both under their respective NAT. I want these to communicate without port forwarding on the client's ...
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1
answer
2k
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What exactly does configuring Windows Defender Firewall to allow/forbid an app to communicate on private/public networks do?
I've installed some app, let's say Syncthing, on my Windows computer. When I run it for the first time, Windows Defender Firewall notifies me:
Windows Defender Firewall has blocked some features of ...
2
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1
answer
567
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Is it possible to allow a cmd command line script in the firewall of windows?
I have a cmd file with this command line:
curl.exe --output index.html --url https://aaaa.com
But I get an error that says it is not possible to communicate with the url in the port xxx.
If I create ...
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1
answer
392
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How to setup firewall rules to allow whitelisted IP for communication over eth0
I have to setup firewall rules for my onboard network(for list of device which are connected via eth0 interface) during boot up of Linux device.
By default all communication over eth0 should be ...
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0
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304
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SMB File share is reachable through ping but its not accessible from file explorer
A specific SMB share hosted on an Azure VM used to be accessible from File Explorer on all on-premises servers, however the share is no longer accessible on almost all servers, even though no changes ...
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1
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4k
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Why open 123/udp in both directions?
When using an NTP server in an environment with a firewall, it is common to open 123/udp in both directions. So my question is, why is it necessary to open it in both directions?
For example, when ...
1
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1
answer
478
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Firewalld DNAT Subnet translation
I want to translate subnets using firewalld.
I have a ethernet interface, that should translate incomming packets targeting
192.168.1.0/24 to 192.168.178.0/24.
My home network is 192.168.8.0/24
I ...
1
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0
answers
126
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IP works on server, but not able to connect on local network
I hae been trying to have an owncloud server on my jetson nano. The installation and setup for the server is done and it works. But for some reason the server is not accessible on my LAN.
When I use ...
1
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0
answers
298
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iptables forwarding stops working after suspending or rebooting
I am trying to forward packets received by a PC on port 16080 to port 3389 to another PC connected to it via Ethernet, where enp1s0 is the Ethernet interface and 10.42.0.66 is the IP of the connected ...
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1
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1k
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How to completely disable internet access on Linux with the exception of select Docker containers?
I am trying to build a setup akin to a "Qubes OS Lite", but using Docker containers on Arch.
There will be several end-user applications running in Docker (with the help of https://subuser....
0
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1
answer
352
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Running all traffic to bypass local firewall
I am on a monitored university network(I live here) and am unable to reach much of the internet, vpn's are also banned, as in they can't establish connection. So I figured I could get a server on ...
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0
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80
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Disable software inserting firewall rules
I'm using Ubuntu 20.04 with Postfix, Dovecot and UFW,
when installing both Postfix and Dovecot I immediately noticed they're adding their own rules into iptables, however using the UFW commands I can'...
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1
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223
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Router intrusion messages in activity log. What does it mean?
Today I decided to check my router security logs cuz I've had connectivity issues and I noticed something unusual and new to me, I noticed this line
Intrusion -> SRC=190.71.82.227 DST=xx.xx.xxx.xx ...
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258
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Windows server 2016 VPS blocking connection even with firewall disabled
I have a windows server 2016 VPS and I want to open ports on it. I went on windows firewall and created an inbound rule to allow tcp connections to the specified port. I even completely disabled the ...
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1
answer
423
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What is the purpose of the windows firewall prompt?
Example:
What is the purpose of this prompt? Pressing 'Cancel' doesn't block the program from accessing the internet, so... what does accepting this prompt allow the program to do?
I haven't been ...
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1
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1k
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Unable to access Oracle Cloud MC server despite following Stack/Google port setup advice
Ive been attempting to set up a Bedrock Minecraft server on a free Oracle VM. I have some experience as I have a server running on a Hetzner instance however a few weeks later after scouring the ...
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2
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Could in-place upgrade of Server 2012 to 2019 affect firewall rules or IIS sites?
An application I support has been installed on Windows Server 2012. The server is to be upgraded to Server 2019 in an in-place upgrade. This is to be done without being tested first.
The application ...
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0
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152
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Synology NAS not accessible remotely after move. Possible firewall issue?
I am a remote administrator for a client who recently moved physical office locations. I'm having an issue with reconnecting back into the Synology NAS that they use for file store. From what they've ...
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0
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2k
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pfsense - slow connection to internet from wired network but not from wireless/wifi
summary: internet speed tests indicate that the connection to the internet from my wired network is very slow, while speed tests from a device on my wifi network gets the expected (much faster) result....
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1
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512
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Where are Windows 7 Firewall custom rules stored?
First of all, I know about the existing answers to the question. They mentioned three places in the system registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\WindowsFirewall
...\SYSTEM\...
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0
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1k
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autapf port forwarding tool - UDP port forwarding
We're using NetworkActiv AUTAPF 2.2.6 tool on Windows 11 PC to setup a TFTP server on windows PC.
The configuration are as follows:
We're seeing timeout errors on our system with this setup as ...
0
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1
answer
548
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IPtables does'nt apply this rule
I got many rules like this :
#!/bin/sh
modprobe ip_conntrack
# Initialiser les tables
iptables -t filter -F
#Vider les règles custom
iptables -t filter -X
#Interdire toutes les connexions entrante ...
0
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1
answer
652
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Proper path for client's "Local Group Policy" in PS' NetSecurity module
So, by default default, Windows client OSes (and servers too, to a degree) have 2 default Windows Firewall policies: weird local firewall and local group policy. In netsh you can easily switch between ...
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0
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632
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Debian with VPN and firewall blocking web traffic
I have a VPN (IKEv2) set up on a Debian VM. I'm trying create a kill switch to stop all traffic when the VPN goes down. I've followed the guidance of this post.
It seems to work fairly well (torrent ...
1
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1
answer
325
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Computer not pinging from the internet
I am trying to set up DDNS for my machine and it works for the most part. And, I would like to remotely ping to the machine. Now, the DDNS is configured properly and it is taking the IP refresh ...
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1
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2k
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Terrible Windows iperf performance
I'm having a weird issue that's totally stumping me. The performance of 10G ethernet on my Windows computer is poor in the incoming direction from one computer, and exceptionally poor from another. ...
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1
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418
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Can my vps provider see that I'm using a vpn service on my vps?
If so can I know, how do they do it? I contacted the CS and they said that they use something like NextGen firewall and AI to detect these actions. I want to know more about this but cant seem to find ...
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255
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Should iptables block RST packets for a websocket connection?
I have the following setup for offloading SSL and running home assistant :
Raspberry pi A (model 3, 10.0.0.21 below) is running apache2, NextCloud and iptables.
Raspberry pi B (model 1, 10.0.0.69 ...
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1
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675
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SMB2 port range? Port 64663?
I'm copying files via the program Bvckup to a windows share.
From a wireshark capture, I see that the operation uses TCP port 445 and SMB2 port 64663.
I want to make a firewall rule, but I am ...
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0
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191
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Is it possible to restrict client-to-client communication on a switch?
I have a linux machine acting as a router with a wifi interface (hostapd) and multiple ethernet interfaces bridged together. I want to add multiple smart home devices to the network.
What I am trying ...
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560
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I cant open port on my router to make my computer app public
I use windows10
I already open port on my router admin page (Advanced Port Forwarding).
Windows firewall Disabled
Even if i setup DMZ Address for my LAN 192.168.0.12 my public address not works.
I ...
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0
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89
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FortiGuard firewall strange behavior/trying to bypass
(Excuse me for the non-technical terms, my Knowledge isn't the Greatest)
Context:
I'm an engineering student and I stay in the dormitory of my university
Lets just say that the network isn't the ...
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0
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341
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Can't clone a remote repo when ufw is enabled
I have a cloud VM running alpine3.15 [disk mode enabled] and I am able to clone/push/pull to github when ufw is off. However when it is on, all git commands that talk to github get stuck (no output)
I ...