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

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2answers
12 views

Advantages of Multi-Tier and Multi-box firewalls?

I'm currently doing a University project and am having trouble getting my head around a few concepts. One reason is the looseness of terms in IT, with network tiers referring to several things ...
0
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1answer
2k views

tracert command is not working but able to access the same site through browsers

tracert [site name] is not working in cmd prompt. But the same site has been working in all of my browsers . Please find below output of command. I need to use this command in my batch file but there ...
1
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1answer
3k views

UDP blocked by Windows XP Firewall when sending to local machine

I work for a software development company but the issue doesn't seem to be programming-related. Here is my setup: Windows XP Professional with Service Pack 3, all updated Program that sends UDP ...
0
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1answer
3k views

Firewall open ports for vSphere

I need to open ports on a firewall, so that a client could access his VM console through vCenter server's Web Client. I had a look at this page about port description, but I am a little confused. I ...
2
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2answers
2k views

Fedora 20 FirewallD GUI not working on X11 forwarding

I am having a problem with SSH X11 forwarding on Fedora 20 with firewall-config, the GUI tool for FirewallD (the dynamic firewall system). With most X11 GUI applications including pretty much all ...
0
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2answers
22 views

Use iptables to block local connection

I wish to block all connections (local and remote) to a service running on a particular port, say port 1000. I have tried the following command: iptables -I INPUT 1 -p tcp --dport 9999 -j DROP ...
0
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1answer
39 views

How can I open a port in my Mac OS X yosemite(firewall)?

I have a java-based server(jar file) and it is running on port 8080. It is running well on my localhost, but I can't access it through other networks I think it's a firewall issue. so, First, I ...
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1answer
1k views

Why can't we turn off firewall And file sharing?

I was under the impression that turning off file sharing "makes it more secure". Especially when I like to have my firewall switched off, turning off file sharing becomes more important to me. But ...
0
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1answer
17 views

Force users pass by firewall for a network with 2 gateways, one over firewall and other direct connection

I have a network with 2 default gateways (i.e. A, B). A is behind a firewall, while B is directly connected. I set DHCP for all domain computers to have Default Gateway for A. The firewall is a proxy ...
15
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7answers
26k views

Changing network type from Unidentified network to Private network on an OpenVPN connection

Is it possible to change the connection type in Windows 7? I have a OpenVPN connection which is identified as "unidentified network" and I do not want to apply certain rules to all unidentified ...
0
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0answers
25 views

Cannot connect to server, error message says “java.net.ConnectException: Connection refused”

I have been trying to get a minecraft server running for some time now to no avail. I apologize for the fact that this is not as technically advanced a question as is intended for this forum, and that ...
2
votes
1answer
7k views

How to setup firewall to allow internet connection sharing via Wifi USB stick?

I have a Windows8 computer linked to the internet via an ethernet cable ("Ethernet" network connection). I have attached to it a DLink Wifi USB stick, and I'm trying to share the main PC's internet ...
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0answers
7 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?
2
votes
1answer
20 views

How to block website from MAC in the verizon router firewall settings

I've tried searching for how to configure my verizon router firewall to block certain websites but nothing seems to be working. Picture of what I've done here I did an nslookup for youtube.com and ...
0
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1answer
16 views

Stateful Firewall

I am a beginner in firewall and trying my hands on stateful firewall rules. I do understand that with stateful rules, the first packet is inspected as per the rules but subsequent packets that belong ...
2
votes
1answer
28 views

Program to block an IP temporarily with iptables

Is there a program on Debian to block an IP address temporarily just by launching a command (specifying the IP and the duration)? With iptables/ip6tables alone I can create a rule, but I would then ...
1
vote
0answers
14 views

502 bad gateway after putting up firewall nginx

My server was working, then I added a firewall for a bunch of ports! And now I get the error: 502 Bad Gateway nginx/1.4.6 (Ubuntu) Nginx server { listen 80; server_name 45.79.80.140; ...
0
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0answers
15 views

Windows 7: Block an entire folder from accessing the internet (outbound)

Every time I need to block an application from accessing the internet I do so by creating a rule (firewall) for a specific EXE file (or other). Usually there are multiple programs in one folder and ...
1
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2answers
31 views

Allowing port access on Windows

I have a message broker running on my computer on port 1883. I tried to telnet that port (to test its accssibility) from a computer on the same network but that didn't work. How can I allow other ...
0
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2answers
81 views

pfsense for its firewall capabilities on small network

I have a small home network of approximately 3 windows machines and 1 pfsense freeBSD (dell laptop): q1. The cable modem is connected to the NON-internet port of the wireless router. Is this the ...
0
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2answers
13k views

How to open a specific port in Moutain Lion Firewall

I cant seem to find how to open a specific port in the ML firewall? I know you can give applications permisiion, but thats no good to me. Is there a way I can specify a specific port?
3
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1answer
31 views

How to setup firewall ports via logon script

I work as IT suport for public service. We use domain controller and logon scripts. These scripts are pretty helpful, since they can automatically install printers and add network folders as local ...
3
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1answer
2k views

Windows 2008 Firewall - How do I restrict HTTP inbound to specific IP?

My goal is to restrict all HTTP inbound requests to a specific IP addresses. I thought it would be a simple process - but I am not getting the result desired I have modified a predefined rule called ...
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0answers
40 views

How can I block my PC from receiving/sending any communication with Russian IPs? [closed]

I recently had a scare when a Russian scammer was able to download a keylogger to my PC when I clicked on a game invite sent to me via steam (they cloned a friends account so it looked genuine). Now ...
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0answers
25 views

How To Configure Portforwarding with iptables

I have got a "Hypervisor" witch has two interfaces: eth0 Link encap:Ethernet Hardware Adresse d4:3d:7e:fc:b2:db inet Adresse:87.25.34.251 Bcast:87.25.34.255 Maske:255.255.255.192 ...
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0answers
10 views

Turning extra 6 LANS into “router” like links using Sophos UTM 9

Hey all I just finished up setting up the UTM 9 Home edition and I currently have it up and running with eth0 as the WAN and eth1 as the LAN. However, my motherboard has a total of 8 Ethernet ports ...
4
votes
4answers
14k views

Windows 7 is blocking ports

I am trying to open port 80 and 3690 for HTTP and svnserve respectively (inbound for both). I have Windows Firewall off, and have tried temporarily disabling Mcafee VirusScan Enterprise, to no avail. ...
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3answers
6k views

Is it possible to put UFW on CentOS?

If so, how would I do it? If not, is there an easier way to set some basic rules on CentOS other than iptables? I'm more of an app developer and less of a sys admin.
3
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1answer
22 views

Port Forwarding with 2 NICs via Windows 7 firewall

I have a computer with two network cards, each of them connected to a separate network. I would like to forward all requests that arrive via port X from one networks to port Y on a host in the other ...
0
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0answers
158 views

Windows 7 ports Blocked even after disabled Firewall

    I am installing 3CX PBX on a Win 7 Pro Machine, in a SBS2011 domain. The problem I am facing is the Ports that 3CX uses are blocked. This Windows 7 , is VM in XenServer 6.2 ...
0
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0answers
25 views

Blocking whatsapp / IM apps on Windows 7 firewall

I'm using a hosted network which I created and shared the local internet with it. netsh wlan set hostednetwork mode=allow ssid="OWNWIFI" key="12345678" netsh wlan start hosted network So I'm trying ...
0
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0answers
18 views

what steps should I take to correct “Windows Firewall is incorrectly configured” when troubleshooting homegroup issues?

I'm trying to get two computers to connect via the Windows Homegroup. When I run the troubleshooter I see this message: . How should I go about fixing this? Most tips on the web say that you need to ...
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4answers
30 views

can I add a hostname that is reachable everywhere?

i'd like to assign a hostname to our database server that is reachable from both outside and inside the building. Let's say we own a domain at godaddy: ddd.com i'd like our staff to reach the ...
-1
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0answers
11 views

Configure huawei E5172s-920 To Use a Host As a Firewall

I want to use a linux machine in my LAN as a firewall so that all traffic in the LAN must go through that machine.But, There no option to use a host as firewall or for setting up a proxy in E5172s-920 ...
0
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2answers
34 views

Intrusions in router firewall

Intrusion -> IN=atm8 OUT= SRC=(random ip) DST=(my ip) PROTO=UDP SPT=123 DPT=80 I'm seeing multiple of these in my router's firewall log, I replaced the actual ip from the example given above. For ...
1
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0answers
21 views

is it possible to use certificates on windows firewall?

Scenario: I have a situation where I work from home. I need to connect to a database server on the internet. The server has whitelist rules for IP addresses on firewall. My IP address changes ...
0
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1answer
35 views

PF: Can't open port on OS X

Have troubles opening the port 9 on os x 10.10.3 yousemite using pf firewall. I want to do this for being able to get wake-on-lan packets to this port. I assume that for WoL to work the port (on the ...
0
votes
1answer
3k views

How to open a port for all users: NSA 2400

I'm trying to open up port 8332 for all users behind my firewall but can only find instructions for doing so for a single IP address. How do I make sure all my users can use a specific port? I've ...
2
votes
1answer
31 views

A secure, iptables rule-set for Ubuntu home router

I am using a Ubuntu 14.04 server machine as my primary home router and firewall. It has DNS, DHCP and uses iptables to secure everything up. Iptables also acts as a nat. On eth0 I have my incoming ...
1
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1answer
51 views

OS X Yosemite. How to block internet access for specific app? (AppStore for example)

How to block internet access for specific app (AppStore for example) in OS X Yosemite, via CLI or GUI?
3
votes
1answer
2k views

Allow access from outside network with dmz and iptables

I'm having a problem with my home network. So my setup is like this: In my Router (using Ubuntu desktop v11.04), I installed squid proxy as my transparent proxy. So I would like to use dyndns ...
0
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1answer
22 views

Chaining one router to another plus a switch

So I have a hardware firewall running OPNsense, a dumb switch, and a router. Could I run the output of the firewall through the switch, have the firewall do DHCP for those running off that, then ...
19
votes
13answers
2k views

How to get past China's Great Firewall and reach blocked sites? [closed]

I wonder if there are any other users who are annoyed like me by the Great Firewall set by the Chinese Government. If so would you please present me an effective way to get on YouTube? Since it's ...
2
votes
0answers
66 views

Can I set up Windows 7 VPN so that only sites blocked in China are routed through VPN?

I'm in China behind the Great Firewall using a VPN service provided by a friend so didn't get blocked in the VPN crackdown in January 2015. Since VPN can slow down traffic a lot I'd like to only ...
1
vote
1answer
43 views

Draytek Vigor 2925 outgoing connection

I have a Draytek Vigor 2925 at home. I use it for my home network an especially the VLAN option is nice, because I need to have multiple "seperate" networks. I have a strange problem, I'm not able to ...
2
votes
2answers
59 views

Passing through a firewall with a “reverse” proxy

I have to do a workshop in a firewalled environment which is preventing me to show everything I would like and I'm looking for a workaround. I'll be demoing a software which runs on Windows. During ...
3
votes
1answer
4k 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 ...
0
votes
1answer
14 views

Can I inherit iptable rules on/under windows?

Don't really want to purchase a VPS just to test some iptables stuff for my gameserver. Was curious if it's possible to load up debian on vmware player and install nginx, nodejs, mysql, etc (which is ...
2
votes
1answer
43 views

How does my computer's firewall work? Like inbound rule, outbound rule, reply?

So I understand how NAT works, but I don't understand how firewall works. With non-symmetric NAT, if someone sends me a packet, it gets blocked, but it I send someone a packet and they get that packet ...
5
votes
7answers
238 views

Is there a way to stop websites on an Apache localhost web development server from accessing the Internet?

I am using Uniserver for PHP web development and I am running windows 8.1 and have Kaspersky installed on system. Most of my work involves working on WordPress websites. Wordpress core files and ...