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

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177 views

ssh to Amazon EC2 Ubuntu server behind firewall

I ssh to an Amazon EC2 server and have just enabled the ufw firewall. This terminated my connection and now I can't ssh back in. I assume the firewall is preventing access. I tried rebooting but no ...
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4answers
135 views

How to secure a Windows ME system connected to the internet? [closed]

I am about to re-install Windows ME on an old Dell Dimension 4300. The computer is connected to the internet via a 2Wire 3600HGV DSL modem/router. What do I need to secure the computer? Do I need ...
2
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1answer
2k views

how can I allow outgoing access to a port in firewall

Im doing a file_get_contents but getting Connection refused I used the following to allow outgoing connections from server2 to server1, and vice-versa. But I'm still getting failed to open stream: ...
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2answers
3k views

How make windows 7 firewall block all traffic

How can I setup windows 7 firewall so that it blocks ALL inbound and outbound traffic of all kinds, unless I am connected to a network that is designated in network options as public? I'd like to ...
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1answer
245 views

Controlling ICS access with Windows Firewall (windows7)

I'm looking for links to documentation or clues on how to add rules to windows firewall to deny all access to internet from computers connected via ICS and then allow only a minimal set of TCP ports. ...
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2answers
277 views

port listening and home router security

I have a Dishtv receiver with sling adapter. The receiver is connected to my router. The router is a netgear DD-WRT flashed router. I was told be a dishtv rep that the router use port 80, 443 and ...
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1answer
651 views

Work VPN only slow on at my house

I am connecting to my work VPN from home. It is EXTREMELY SLOW. network admin and sys admin see no issues on the VPN side. IE, it is working properly from them when they are on the vpn and the ...
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1answer
682 views

Chrome is not on the list of allowed programs on Windows Firewall but works fine?

I check my Firewall's list of allowed program and Google Chrome is not one of them but it still works, it can still connect to the internet. I'm really confused. I don't know how this Firewall ...
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1answer
538 views

Allowing a port through my firewall doesn't work

I've been trying to forward port 1604. When I disable my firewall canyouseeme.org says the port is open. When I turn it back on, it says it doesn't work. I have port 1604 allowed in my my firewall ...
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1answer
258 views

How do I drop the entire INPUT chain from iptables?

On Linux, I've been building a malicious IP list. I assume the DDOS is now gone. How do I drop the entire INPUT chain from iptables, without affecting the FORWARD or OUTPUT chains?
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4answers
5k views

Multiple web servers behind a single firewall

I have multiple web servers behind a single firewall (SVN, Exchange, etc.). I want to be able to access all of the various servers remotely, but since they are All using the same port (the standard ...
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1answer
129 views

SSH Port closed although forwarded correctly

I'm having an issue with opening my SSH port. Here are the symptoms. Within the local network I can ssh to the machine, including both locally (ssh localhost) and from alternate computers. I have ...
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1answer
57 views

How to disallow clients of a router to connect each other

Having a regular wireless/router (ADSL router), Can I prevent clients to connect eachother? My server has ip 192.168.1.2, Wireless router has 192.168.1.1, And clients will have 192.168.1.3~255 How ...
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1answer
5k views

Can't access website hosted on my computer from LAN

I am trying to access my webserver from another computer and from mobile over local network using IP of host server. I figured out that its not the problem of sever specific as I already tried ...
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1answer
305 views

Apache server on win7 cannot be accessed outside of localhost

I have installed the apache-tomcat server on my local win7. The port I specified is 9999. I can access my service by http://localhost:9999 and http://myIPAddress:9999 But I cannot access my apache ...
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2answers
3k views

UFW is active but not enabled why?

I was trying to setup a firewall in my Ubuntu 12.04 machine. After some struggling I got the following. Isn't this sounds a bit odd? thomas@thomas-K40IJ:~$ sudo ufw status verbose Status: active ...
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2answers
510 views

What are the essential firewall configurations for a newly live CentOS web server?

I've newly got a CentOS server from Linode.com which I'm using as an Apache web server with the LAMP stack. I notice that the firewall is enabled by default but doesn't seem to have any active rules. ...
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1answer
3k views

Import Export specific Windows Firewall Rule

How do I Export and Import specific Window Firewall rule (both Inbound and Outbound) ? I can do Import / Export policy but it will use ALL rules not specific rule. Same with Export List, it can ...
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1answer
240 views

When using a VPN (for anonymity) can other computers “see me”? [closed]

Just as I connected to the VPN, ipredator, allshare (sharing server from samsung, so tv can access stuff on computer), came up with a warning about azereus was trying to access my stuff. I don't have ...
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0answers
65 views

Windows 7 Security setup with firewall

Sorry if this is a repeat, but I have been searching the forums and haven't found an exact answer for my question. I have had some security concerns on my home network lately so I decided to take a ...
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1answer
3k views

Completely disable internet connection except for browser and bittorrent

I need a simple software that ideally needs minimal configuration that will completely block all incoming and outgoing internet connections on my computer, with the exception of a browser (Firefox) ...
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1answer
6k views

How to open up firewall for incoming Remote Desktop connections in Win 7?

How do you open the Win 7 Firewall for incoming Remote Desktop connections? I get this message in System Properties:
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2answers
739 views

why I can't use external proxy in an internal organization?

Many organizations use an internal proxy. If you select that proxy you can use the Internet with their restrictions & filters. My question is, can I use an external proxy like what I can do in ...
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1answer
116 views

Web host keeps blocking server feeding me XML via POST request [closed]

I recently set up a site on a web hosting provider. The purpose of the site is to receive XML messages (via POST) from satellite comms data centre and store them in a database. Frequency of the ...
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1answer
954 views

Window 8 machine cannot ping devices on same subnet

After returning from vacation during which several Windows updates were applied and my router suffered a hard power cycle, my Windows 8 Desktop can no longer ping other devices on the same subnet. ...
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3answers
743 views

linux routing outbound port 80 traffic via ssh tunnel, iptables, or a simple route

I have two hosts, A and B. Host A hosts services on port 8080 and has outbound internet firewall rules allowing port 80 and 443 access to Host C. Host B is on the same subnet as Host A. Host B is ...
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1answer
1k views

using iptables to prevent RST related to a specific port

I have a program which uses libpcap to capture incoming TCP SYN packets, these SYN packets are destined for a specific port. But I have no tcp listening socket for that port, so in practice, the OS ...
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2answers
5k views

How to access NodeJS server on LAN?

I'm not the most knowledgeable guy ever with networking, but here goes... I've created an application with NodeJS and I'd like to test the application on my LAN with my family. The application ...
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2answers
4k views

How does telnet get through the windows firewall?

I activated the Telnet client in Windows 7 and was instantly able to connect to servers although Windows Firewall is activated. How does that work? Shouldn't the firewall block outgoing connections ...
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1answer
5k views

What Does This Windows Firewall Rule Do?

I found and implemented this code that adds a rule to Windows Firewall. It supposedly speeds up YouTube streams. Can someone explain what is does in terms of request/response? I'm not seeing any ...
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2answers
1k views

IPtables Rules to Block IP Range

I've applied the following rules from a text file called "iptables.save" to iptables. But to my dismay, I found that the ip address 107.22.26.176 is still able to access my server via TCP. What did ...
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1answer
83 views

What does Windows Firewall do if I don't add a specific firewall rule?

Suppose I have a program which needs to connect to the Internet in order to work. Let's also say that I only want this program to communicate on private networks, so I add a firewall rule allowing it ...
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1answer
599 views

How to allow access to only specific IPs with Parallels VZ built-in firewall?

How can I use Parallels Virtuozzo's built-in firewall utility (called psa-firewall under the hood apparently actually psa-firewall seems to be a seperate Plesk interface - either way, it's basically a ...
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1answer
196 views

Sandboxing Windows7 apps

Are there any software packages, that allow to selectively limit filesystem access for each application? Do they have significant impact on system performance?
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1answer
52 views

Delete a previously added rule in ufw

I created a firewall rule for an application and put into /etc/ufw/applications.d, added that rule with command sudo ufw allow MyApp but now I cannot delete it. When I do sudo ufw delete MyApp ...
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28 views

How can I view the web accessed through the firewall?

My company has a flash application with dynamically updating content. From what I can tell—I, of course, do not have the source code for the flash application—the flash application uses a type of GET ...
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1answer
736 views

How can I check what outbound ports are allowed in a network?

On some networks (primarily corporate ones), the firewall restricts outbound connections to some port number. The allowed ports generally comprise of port 80, 11, 443, etc. Is there a way I could do ...
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1answer
485 views

Anonying Firewall - Still cannot access banned sites like facebook even via SSH tunnel through SOCKS 5 Proxy

I'm in some un-named country and I connected to my SOCKS 5 Proxy via an SSH Tunnel which is located in the US. I tried to visit facebook via the browser, but it just times out. But when I ping ...
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1answer
811 views

UDP packet and firewall

I notice when I send udp packets from computer A to computer B, B can receive the upd packets correctly but if I send udp packets from computer B to computer A the udp packets are not received A and ...
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1answer
271 views

Using a VPN, yet some websites still blocked

I'm using a VPN provided from my workplace, yet I am still being blocked via the firewall at my school from accessing some sites. Is there a technical reason, why I am not able to bypass the firewall ...
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2answers
1k views

What is the best way to restrict network access for one machine on a home LAN?

As an example, I have 3 computers on a home network: Machine A Machine B Machine C What I would like to do is isolate "Machine C", so that it cannot communicate with "A" or "B" and vice versa. It ...
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1answer
248 views

my credit card leaked [closed]

I got a phone call from someone pretend from Amazon and he want to confirm my credit card so he asked the expire date and security code when I refused he give me full name, address, last 4 digits of ...
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2answers
283 views

How to allow safari through firewall windows 7?

I turn on my windows 7 firewall and was unable to search for option to allow safari access to internet. Can anyone help me?
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1answer
671 views

ssh using putty to server outside vpn

I don't know too much about networking and I'm hoping someone can point me in the right direction. I'm not sure how to go about solving my problem... When I'm connected to my company LAN, I'm able ...
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1answer
1k views

Windows Firewall Block Inbound External IP

I am trying to block 1 ip address from connecting to my computer. However I am confused by this screen: If the rule is set to block ip, but I cannot get a way to allow local ips. Is there a way to ...
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1answer
175 views

Safe to publish port 80 on IIS 7.5 webserver?

Is it safe enough to set my firewall to forward port 80 and 443 to my IIS 7.5 webserver? I know that TMG has some packet inspections, but my current firewall has no inspections, so I wonder if it's ...
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1answer
107 views

Configure application integration with ufw firewall

I've read the ubuntu developer docs regarding the ufw here, but couldn't find what I was looking for. It allows me to set rules for controlling in/out traffic based on source IP or port numbers, but ...
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1answer
391 views

Using a Linux virtual machine as a firewall under Windows 8

I have recently bought a computer with Windows 8 (I will call it 'W8'). I would like to keep the install on W8 'pristine' by having it for internal network use only, without access to the internet. I ...
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2answers
483 views

How to check if my firewall is actually protecting me?

I have set up a home firewall inside a virtual machine and I have configured it. How can I test if it is actually working and blocking dangerous connections coming from the internet? Are there some ...
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1answer
1k views

Allow access to my home server only from my LAN using external hostname

I have a home lan network which is connected to internet using Dlink DIR-825 router. ISP:s dhcp has given one external ip (eg. 91.154.214.101 which is for security reasons not my true ip) and it can ...