A firewall is a piece of software that controls what connections can be made to and from a network.

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1answer
257 views

Bypass home router firewall [closed]

I have a roommate who is sometimes allowed to use my internet connection. When he needs access to the home network, I simply go into the router settings and remove his hostname (roommate-PC) from the ...
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1answer
48 views

Reach ssh server behind a router on embedded system using established socket connection

I have developed an embedded application running linux to do remote I/O control. The application open a socket connection to my server to communicate, periodically, the state of the I/O and getting ...
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2answers
137 views

Pinhole Conflicts

I am trying to write a simpler client server program, using my laptop as the server and several Android devices as clients. The server listens on a port (say, 5902) until a client tries to connect. ...
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1answer
244 views

Asterisk server firewall script allows 2-way audio from incoming calls, but not on outgoing?

I'm running an Asterisk PBX on a virtual machine directly connected to the Internet and I really want to prevent script kiddies, l33t h4x0rz and actual hackers access to my server. The basic way I ...
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1answer
55 views

Windows 7 windows firewall updates error

I'm having a issue with windows firewall. I can't turn it on or off. I also can't edit it. And Windows firewall is requesting updates, but whenever I make those updates it still doesn't work. Here's ...
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4answers
57 views

Would a switch be covered by a router's firewall

So... Hopefully; this is the right place for this question. I need more Ethernet ports on my home network. Sadly, we already have an old router connected to the main router and we still need more ...
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2answers
267 views

How can I get Windows 7 firewall from being stuck in public network?

A few weeks ago, my Windows 7 Firewall switched itself from a private network to a public network. I noticed the problem when I was trying to stream a movie from my computer to my TV (as I did dozens ...
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1answer
282 views

Block All Traffic and Allow from Defined IP only in IPTABLES

I want to create a gateway firewall for my network . I want to block all the internal traffic on gateway and allow it from two computers only . On gateway --> eth0 is network card in gateway PC ...
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0answers
20 views

Wrapping a point-to-point link

I'm using a pair of IP radios (non-WiFi) to bridge my office engineering LAN (172.0.0.0/8) to a lab in another building. The radios work fine, but they expose a web management interface I'd like to ...
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0answers
35 views

How do I configure Windows Firewall to disallow inbound connections only at work, but still treat work and home as private networks otherwise?

I have a Windows 8.1 laptop that I use at home and at the office. When connected to my router at home, I want all the features associated with Windows Firewall's notion of a "private network"--that ...
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4answers
647 views

Remote into Linux workstation behind a firewall using NoMachine or other remote desktop service

My question is very similar to this question: Remote into Linux workstation behind a firewall My work has firewall and ssh server. The ssh server is listening to the default port 22. Normally I ...
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0answers
1k views

Why does NTP require bi-directional firewall access to UDP port 123?

From What are the iptables rules to permit ntp?: iptables -A INPUT -p udp --dport 123 -j ACCEPT iptables -A OUTPUT -p udp --sport 123 -j ACCEPT Also, from the NTP website: ... ntpd requires ...
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1answer
813 views

Cablemodem (SBG6580) firewall denying some outbound traffic? Why? Not configured

I finally got around to turning the syslog on for my cablemodem (Motorola Surfboard SBG6580) and I'm seeing about the expected amount of inbound attackage being blocked... 2014-05-30 21:59:02 ...
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1answer
48 views

iptables: Is it dangerous to filter by source port?

I would like to run a stateless firewall setup and I currently have the following rules: #Do not track any packet *raw :PREROUTING ACCEPT [0:0] -A PREROUTING -j NOTRACK COMMIT #Actual firewall rules ...
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1answer
298 views

Is it possible to block websites on Buffalo AirStation WCR-GN?

Is it possible to block websites on a Buffalo AirStation WCR-GN? I've gone through every menu looking for anything that might do that and I can't, so I'm guessing this device is too primitive to be ...
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3answers
60 views

How can I connect to a VPN with a restrictive network?

I have recently relocated and the network I have been provided blocks every outgoing TCP port except for 80 (http) 443 (https) 465 (smtps?) 587 (submission) 993 ...
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1answer
716 views

VPN and getting router/firwall configuration correct

For the life of me can not get my VPN working using PPTP or L2TP or anything. My subnet is set to 192.168.13.1 to avoid conflicts. I have tried to reach my desktop/server from my laptop/client using ...
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0answers
212 views

FTP blocked by firewall on windows 8.1 update 1 public network

I've recently upgraded to Windows 8.1 u1. I connect to VPN to one of my projects, over which I connect to FTP server (using Total Commander 8.51a). Now, when I try to connect, Total Commander hangs on ...
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0answers
141 views

Firewall Block all outgoing connection

I want to block all outgoing connection. I have created a custom rule: C:\Windows\System32\netsh.exe advfirewall firewall add rule name="blockout" dir="out" action="block" enable="no" ...
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1answer
140 views

Bypassing proxy for loopback/locahost

I am developing a web application where in I am running a webserver at localhost:3000 and my app is deployed on the same. Access to this URL through a web browser works fine because there is an ...
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1answer
187 views

iptables --append FORWARD required for routing between NIC alias IPs?

I have an ubuntu box with a single NIC. In order to bind a number of services (like apache, dnsmasq, etc), I have bound them to different alias's (e.g. eth0:0, etc), some of which are on completely ...
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0answers
41 views

How can I restrict a user in an AD environment only to have vpn access but no directory share rights?

I'm trying to restrict an AD account to only have vpn access rights but no domain user rights. Can it be done or should I try something out of windows server's boundaries? We are using a Fortigate ...
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1answer
37 views

Firewall rule for local, interactive users?

I want to add a firewall rule that applies to a local interactive user. The intention is to clamp down the box, and only allow web and mail related connections, and update service connections. On ...
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0answers
44 views

How should I configure my Tor-dedicated firewall for optimum security?

I'm setting up a Tor-based isolating proxy using the 'Anonymizing Middlebox' iptables rules specified here: https://trac.torproject.org/projects/tor/wiki/doc/TransparentProxy i.e. iptables -t nat -A ...
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1answer
202 views

How do I fix these iptables?

I am trying to setup my networks firewall, and am having trouble because i keep getting kicked out of SSH because of mistakes. Here's what I currently have: # Custom Rules iptables -F iptables -X ...
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0answers
174 views

UFW Not Allowing Apt-Get and other HTTP Services Out

I've built a limited firewall appliance out of a Raspberry Pi, two NIC cards, and a Raspbian OS using UFW for the firewall. Another Pi (also on Raspbian) sits behind it as an application/web server. ...
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1answer
145 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 ...
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0answers
36 views

Windows Firewall - Block everything except one application not working

I want to block every possible application/service/whatever from accessing the internet except for Chrome in Windows 7 I have set inbound and outbound connections to be blocked for the Domain, ...
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1answer
231 views

Game Client's Listening Server Unable To Establish A Successful TCP Connection (Updated)

Scenario, A Risk of Rain On a game called "Risk of Rain" (RoR), I am hosting my own listening server. However to my demise, it seems that nobody can successfully join my server. I have done the basic ...
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2answers
36 views

Why are these iptable rules keeping me from browsing the internet? (allowing 80,443,53)

This is for my home machine. Here are the rules: Chain INPUT (policy ACCEPT 0 packets, 0 bytes) num pkts bytes target prot opt in out source destination 1 ...
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1answer
231 views

Router Firewall: All ports stealth mode except when I connect using VPN-then port 88 open

I am using a Netgear wireless router, and its internal firewall is good. Testing by using Gibson Research "Shields Up" indicates all ports invisible. However, when I use a VPN service to connect to ...
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1answer
506 views

Possible to find out what's using javaw.exe to connect outside the network?

Is there any way to find out who/what is running something through java/javaw.exe, in order to determine if the outbound network connection is safe or rogue? I use a third-party firewall (Windows ...
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1answer
264 views

Is there anyway to see when a Windows firewall rule was created/enabled using PowerShell v2 or CMD?

I have been poking around the interwebs but I cannot seem to find a definitive answer to this question. I am forced to work with PowerShell v2. I know that using the following command will give me a ...
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2answers
179 views

ping behind firewall, success for some hosts, fail for others?

I'm under firewall, I can ping to some hosts but not to other hosts my IP addresss 172.19.7.111 mask 255.255.240.0 I can ping to host 172.19.2.111 (that I discovered with Angry IP Scanner) but not ...
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1answer
77 views

Why isn't my router allowing my PAP2T to connect to my VoIP service?

My tech knowledge is middle-low: as you can see I'm not shy about getting into the interfaces for my router, but have no idea what the more complex settings mean. I got a new wireless router (D-Link ...
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1answer
30 views

Do you need a software firewall when using VPN?

How secure/vulnerable is a remote laptop with no firewall enabled but connected to the office through a VPN? The office has a network firewall.
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103 views

OpenVPN Server & Two Gateways

I have a network setup as follows: The firewall allows incoming connections for the VPN server on OpenVPN ports and all outgoing connections from the NAT. It is stateful, even for UDP "connections" ...
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1answer
55 views

Ports in Linux vs Windows

I'm studying for a security class. I know that ports in Linux are tied to a process. So if I wanted to close/shutdown a port, I'd end the process that's using it. So if I'm in Windows, what's ...
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1answer
169 views

SSH into host on the same network behind a firewall that blocks SSH

I'm trying to SSH into my Raspberry Pi, which is on the same wireless network as my SSH client. My firewall blocks SSH connections. I changed the sshd listening port in my Raspberry Pi to 80 like ...
0
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1answer
181 views

Unable to change Windows Firewall settings

I am unable to access the settings for Windows Firewall on my Windows 7 32-bit computer. I go to System and Security (Start > Control Panel > System and Security) and click on Windows Firewall, but ...
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1answer
385 views

Windows Firewall inbound rules still blocks ports

I applied inbound rules for port: 1935, as well as outbound. When I check on canyouseeme.org, it says it (port 1935) times out. When I completely turn off Windows 7's firewall, it works without a ...
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1answer
733 views

iptables blocking all traffic even with ports opened

Simple as I can put it: I can't access my servers with iptables enabled, with default rules. Need to disable iptables to get access. Trying to find the cause. Only difference in setup type is layer3 ...
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0answers
2k views

Opening port 8080 on Windows firewall

I am not sure if I am just missing a trick here and it will be something rather simple, or if I am trying to do something that just isn't going to work.. Anyway, I have an asp.net site and I am using ...
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1answer
53 views

What happened to Comodo Defense+?

I just updated Comodo to version 7, and there is only the Firewall now. Defense+ seems to have been discontinued as I can no longer find it. What happened to it?
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185 views

Conntrack/NAT's port mapping for a specific port breaks whenever that port's service is shutdown for too long. How can I fix this?

Linux Gentoo 3.13.6-hardened-r3 #1 SMP Sat Apr 12 09:17:25 EDT 2014 x86_64 Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz GenuineIntel GNU/Linux hardened with grsecurity and selinux with a strict policy in ...
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1answer
326 views

Prevent the use of VPN/SSH to bypass porn blocking solutions

I've read the various questions about content filtering and it seems that openDNS is the consensus solution, although it's easy to bypass with a VPN service or an SSH tunnel. Is there a way to ...
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0answers
221 views

Is it possible to route all traffic on VirtualBox host adapters to guest?

I am upgrading Ubuntu 8.04 on a dedicated router/firewall/NAT/SMTP/SSH server with a current Linux (Debian Wheezy). I am using VirtualBox (4.2) with Ubuntu 8.04 as host and the new Debian build as ...
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0answers
785 views

Is the Whitelist Network Service Filter Feature on ASUS Routers broken?

I have a ASUS RT-N16 router running firmware version 3.0.0.4.374_4422 I have a voip phone (physical) with it's own private IP address (for the purpose of discussion, let's call it 192.168.0.1) and ...
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1answer
287 views

mac osx littlesnitch blocking outgoing connections from ssh remote login

I have setup remote ssh access on the rush in my development computer (OSX 10.6.8) before leaving my home for holiday yesterday. It is correctly setup, and I can access it via SSH, logging is as root ...
0
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1answer
112 views

How to block all applications from accessing a connection in Windows 7 firewall?

I consider myself quite tech-savy but this one gives me real pain. I've connected to VPN through PPTP and I'm attempting to set up firewall rules to block any application from using it. Essentially, ...