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

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How to create firewall rule on virtualbox windows host to control linux guest access to internet?

I have a windows 7 64-bit host (all outbound connections generally blocked) and run virtualbox (5.0.1) with an opensuse 13.2 guest and need to create a firewall rule on the host to allow access from ...
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2answers
432 views

Should fwknop be listening to a port?

I am trying to install fwknop on a VirtualBox Debian 7 machine. It installs with no error (apt-get install fwknop-server -y), i made the modification in /etc/default/fwknop-server file so daemon ...
2
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1answer
243 views

VMware Player and Windows 7 firewall

My Windows 7 firewall (the one by Microsoft that is shipped with the OS) is configured to block all inbound and outbound connections by default. Because all outbound connections are blocked, I ...
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1answer
62 views

How to disable UFW on Ubuntu after locking out SSH?

I enabled the UFW firewall using SSH on my server at Digital Ocean running sudo ufw enable. and forgot to allow the ports for SSH, FTP, ... (but allowed port 80). How can I SSH into the server or ...
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1answer
50 views

How to block all outbound connections in windows 8.1 for a specific WIFI connection

I'm travelling around and use lot's of different Wifi connections. When using a general wifi connection everything is allowed. There is only 1 connection (a wifi hotspot connection to my mobile phone ...
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0answers
36 views

Configure tomato firewall in VM or Debian / CentOs server

I want to use tomato as my internal firewall for accept/block network packets inside my server system. I know that tomato provides firmware for some routers but I want to do some tricky but don't know ...
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0answers
30 views

Firewall blocks port connection even if I add an inbound rule

I am trying to upload files to a FileZilla FTP server. I have setup in my PC the server and I am using a simple C# script in order to upload files. It works properly when I run the script from the ...
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130 views

Why apache log “(111)Connection refused” warning when child process is closed

I am running a server using apache, and the apache error log is periodically getting this warning, usually when there are visits to the site, and usually in groups of at least two or three at a time. ...
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2answers
1k views

Source port 443?

I'm might embarrass myself with this question, because of something really obvious, but I'm puzzled. My home broadband firewall log says it has been blocking incoming TCP traffic with a source (!) ...
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1answer
92 views

Network issue - client on Android device not connecting to server on my laptop

I have a server app running on my windows 7 laptop and I have a client app running on my Android phone. Both, laptop and phone when connected to my work WIFI can communicate. I can log it into my ...
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1answer
182 views

Using UPnP when Connecting to internet using (Router+Modem)

I want to enable the UPnP to make programs like Gameranger host some games without problems . I am connecting using a Gargoyle router , and that router is connecting to the internet using ZET ZXV10 ...
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1answer
16k views

How can I use network printer while Bitdefender firewall on?

After I installed Bitdefender Total Security 2013, I can't print. I found that I can print only when I turn off firewall (from Bitdefender) How can I print with firewall? I think I should give ...
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1answer
260 views

Disable Fortitoken on a Fortigate Firewall

I made an error while configuring my admin account on the FortiGate 60d and enabled forti token for 2 step authentication. Thing is I enabled the wrong token and I do not have that device with me. Now ...
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0answers
53 views

SSH Tunnel via very restrictive HTTP Proxy/Firewall

I know how this usually works, I've done a lot of investigation and tinkering to get this far and my observations are reproducible. Have a (few) SSH Server(s) Running on port 443 (https), and a few ...
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1answer
58 views

force mail program to use wireless and wired connections side-by-side

My wired internet connection at work blocks the IMAP, POP and SMTP ports (the mail server is Exchange) which prevents me from using an email program like ThunderBird. With the internet cable plugged ...
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2answers
327 views

How to allow Visual Studio FTP in W10 Firewall

I'm trying to publish some software to an FTP site with Visual Studio (VS) 2015 community, The output window shows an error An error occured trying to enumerate the contents of folder ''. An ...
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1answer
563 views

SMB over SSH port forward

I know that since SMB is not secure, opening port 445 on firewall makes your computer vulnerable. To secure my connection, I want to run a SMB mobile app via SSH. Would I still need to open port 445 ...
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0answers
100 views

How to config Mac OS X firewall to let http (80) request in?

I hava installed xampp in my Mac OS X 10.11 (El Capitan). It works fine when I type http://192.168.0.63 (my IP address) into my browser, but others in the same network can't access through ...
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1answer
350 views

How to see which applications use “Host process for windows services” to eat metered data?

I have to spend a lot of time on metered connections in a country where data is expensive. I use Glasswire firewall to keep an eye on what software is using my precious data and to throttle programs ...
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1answer
41 views

how much of a security risk is turning off the firewall in a modem?

I have a router that I want to plug into a modem/router too (the latter is a poor router) and the advice I'm getting is to set the modem / router to full bridge mode, like so: ...
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1answer
137 views

Mikrotik: One firewall rule for multiple chains?

I created multiple firewall rules for input chain as described in an article and now it seems that I need to create the same set of rules for forward chain. Could I make a rule for multiple chains?
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57 views

Block Port 4000 on Window 7

On Windows 7 Enterprise 64 bit system Need to block Port 4000. Under system Firewall by creating inbound rules and outbound rules have blocked port 4000 but its not working. Need your advice. System ...
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2answers
8k views

MacOS X: log is full of “stealth mode connection attempt”s from LAN router

MacOS X's logfile daily.log is full of lines like this: Sun Jan 29 09:51:47 nameofmymac Firewall[77] <Info>: Stealth Mode connection attempt to UDP 192.168.2.49:51855 from ...
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1answer
614 views

Ubuntu IPTables allow only allow 1 country

So I've been looking around on the net for a script that will drop all traffic to all ports except the http(80) and https(443) ports, and then only allow traffic on all other ports from country x ...
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3answers
13k views

Enable ping in Windows 7 firewall?

Server Fault tells that the new syntax to enable ping on Windows Server 2008 is netsh advfirewall firewall add rule name="ICMP Allow incoming V4 echo request" protocol=icmpv4:8,any dir=in ...
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1answer
45 views

Unable to rdp after fw change

VM Windows Server 2012 r2 I was able to rdp to this PC without issues until today. While logged in via rdp I was in control panel > firewall and I noticed that there was a message saying 'use ...
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2answers
74 views

Windows firewall - opening ports by specifying .exe

Normally, you open ports by specifying port number and the protocol - either TCP or UDP. However, Windows allows me to add exceptions by specifying the executable file. How does it work? What happens ...
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1answer
87 views

Windows port forwading

i got the following setup on an windows server 2012 R2: i have 2 nics: Nic1 has an public ipv4 adress (lets call this 5.5.5.5) Nic2 has an private ip adresse (192.168.2.10) So now i want to ...
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1answer
26 views

Can not access web domain from local computers

I have a WEBserver IIS7 in my local network. When I go to "www.mydomain.com" from a computer inside same LAN I cant access it. If I put in the local IP it works. "www.mydomain.com" do also works from ...
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0answers
415 views

how to stop PC from sending ICMP of “Destination Unreachable(host administratively prohibited)”

I'm doing some experiments and measurements. I send some random TCP packets to a laptop(with fedora system), that laptop reacts by sending ICMP packets of type 3 and code 10, which means Destination ...
3
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2answers
12k views

How to permanently disable firewall in Red Hat Linux

I have followed the below steps to disable the firewall in Linux. After reboot, again firewall is enabled. How to disable firewall permanently? Login as the root user. Next enter the following three ...
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5answers
16k views

Windows tool to find out which port an app is trying to use?

I am guessing that netstat shows apps and their ports that already have a connection and it doesn't show or can't show an app that is trying to open a connection. If I have an app that's trying to ...
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2answers
87 views

Windows 7 cannot establish outbound connections on port 80

I've been pulling my hair too long for this particular problem and now I'm on the verge giving up. Scenario: local network in the workshop consisting of two Linux-machines (one server, one ...
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2answers
261 views

Some confusion about listening and open ports, difference between listening, open and blocked

I have been strugling for some time now to open ports on some Linux machines and I have followed some tutorials, which I tried in 2 different Linux VMs and failed for either, and after some research I ...
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0answers
38 views

Block traffic when VPN disconnects

I want to connect to a VPN using the command line tool OpenVPN. To stop ingoing and outgoing traffic when the VPN disconnects because of some problems, I want to use the OpenBSD Packet Filter (PF). I ...
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0answers
31 views

Problems with opening ports on Linux

Basically I have tried every tutorial I could find but I can't seem to open a port in a Linux VM. I tried downloading gufw and opening a port there; didn't work. I disabled gufw; didn't work Set a ...
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51 views

How to setup a network proxy with a server and RouterOS?

Right now, we have a router with RouterOS which provide network for several machines connecting to it. We have a server connected to the router and we have a software which provide pac http proxy ...
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0answers
51 views

Unable to remove port 22 from firewalld

I am running a VPS that i have gone and installed firewalld on, on this box, the service comes by default with port 22 open so that you can still gain ssh access. I have manually changed the SSH ...
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2answers
88 views

How to ssh a computer which is behind firewall

Consider I have three computers home my computer at home work my computer at work server my server I can't connect from home to work using ssh because of my company firewall. But I can ssh any ...
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1answer
30 views

Home firewall with application monitoring [closed]

I'm looking for a way of monitoring http at application level at home. As such I don't want anything hugely complex or expensive - just a way of looking at, say, Facebook usage by device. Any ...
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2answers
355 views

How do I drop packets that contain a certain ASCII string on Windows?

I'm trying to find a way to block any packets that have particular character strings. I want to specify both the content to filter for and the destination port. I've looked at several firewalls but ...
0
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1answer
551 views

TCP connect: No route to host

I started a tcp server on a host A and then start a tcp client on another host B. Both hosts are in the same LAN via the wireless router at home. the tcp client tries to connect to tcp server on port ...
0
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1answer
119 views

Blocking IP address ranges in a Windows 7 VM under Virtual Box

Using Windows 7 installed in a virtual machine built with Virtual Box 4.3, I have created two Inbound and Outbound firewall rules. I need to block two ranges of IP address in the VM. However, ...
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0answers
115 views

Sophos UTM Firewall unintentionally blocking access

I am using Sophos UTM 9 and it blocks some users' access to our company website while others are able to access it. When a blocked user attempts to visit the website, it shows the Sophos UTM screen. ...
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0answers
151 views

tomatousb - Allow only specific IP to connect to other IP port

I'm using tomato shibby on a router, and I'm trying to set some specific rules using iptables to set the following: I have a server, which runs on 192.168.1.2 (LAN) port 2232. Everybody from the LAN ...
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0answers
32 views

How to check all open ports

In our firewall (using Windows Server 2008 r2) we've allowed only port 80 and closed all other ports. How can we test if the firewall is only allowing port 80?
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37 views

Skype 443 port filtered

I have Skype installed on a Windows but I'm after a FW 443 port that has the filtering and Skype not working. Apparently it seems that outbound traffic is not working. Is there any way for Skype to ...
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0answers
21 views

Unknown UPnP Entries

Was checkout out my Firewall on which I usually have UPnP disabled, but turned it on as a debugging step for an issue I was having. I just noticed three ports registered that I am unsure where they ...
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1answer
169 views

Why I can't block PING.EXE inbound and outbound traffic?

I want to block C:\Windows\System32\ping.exe for any inbound or outbound traffic in Windows-7. So in the Windows Firewall, I added two rules to aim this goal (one for inbound and one another for ...
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0answers
98 views

Complete masquerading NAT example using nftables on Linux?

I'm looking for a complete example how to do this using nftables. It should be a DHCP client on the upstream interface, have a 192.168.0.0/24 LAN on the other interface, and also act as a firewall. ...