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

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configure iptables to block all(as much as possible) bittorrent traffic

good day all This is my current iptables setup Generated by iptables-save v1.4.7 on Wed Apr 9 13:50:31 2014 *filter :INPUT DROP [0:0] :FORWARD DROP [0:0] :OUTPUT ACCEPT [0:0] :LOGDROP - ...
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1answer
70 views

Blocking an IP in Windows Firewall

I am attempting to block a connection to a games' masterserver (see this for more information, including why I am trying to do so), but however redirecting the DNS has not worked, so I am trying to ...
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1answer
149 views

How to configure sonicwall to allow systems from internet to access dlink ip camera?

I am trying to configure sonicwall to allow access for the ip camera from internet. The camera somehow sends out ARP packets which are being dropped at the firewall. When used packetmonitor to see ...
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1answer
307 views

What might these connection attemps mean?

Yesterday I opened a port on the router, forwarded to LAN IP 192.168.1.201 and blocked the ADSL company password to access the router. There is no other open port on the router. This log is from the ...
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1answer
102 views

Block a Subdomain in Windows Firewall

Gamespy is ceasing its Master Server support for many games at the end of May, including Crysis 1, Wars, and 2. I have worked with Crysis 1 and Crysis Wars for a very long time, and now the entire ...
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2answers
89 views

How to allow ssh into a device on remote 4g modem when provider is blocking inbound connections?

I am planning on deploying a network of remote devices, each connected to the internet through a 4G modem. The devices need both outbound connectivity to our cloud-based servers, and occasional ...
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0answers
499 views

Reset Enable password ASA 5505 via ASDM

I have an ASA firewall setup, but i have forgot the enable password; I have the admin password anyway. I am not trying to reset password using rommon; Please dont suggest confreg break I saw an user ...
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0answers
43 views

Juniper Firewall setup

I bought an old Juniper 5GT firewall simply to do some port filtering. I have set the device up in a DMZ zone of my home network, there is a server behind it and it has been assigned an IP by the ...
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1answer
128 views

IPtables preventing outgoing packets

I am trying to setup firewall rules on a RHEL webserver, so that my webserver can serve up web pages and at the same time download remote files using curl/wget. Problem I am experiencing is I can only ...
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87 views

Display port numbers and port names

How do I display both port numbers and port names at the same time? I can display the forward port numbers (i.e. 22, 25, 1000, 443, 80) using the following: [root@michaels ~]# iptables -L -n Chain ...
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64 views

Changing the ports a program uses

This question might not even make sense. I have a very limited understanding of how networking protocols work. My phrasing of these questions might be very poor. My school has a firewall enabled. ...
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3answers
110 views

Making Win XP as future-proof as possible [closed]

So Win XP is finally going off life support. Unfortunately, the Print Shop I work for has equipment that requires XP (i.e. no drivers are supported in the newer OSes) We have upgraded most of our ...
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55 views

Access MySQL running on VirtualBox Win7 guest from a VirtualBox XP guest

I have a Windows 7 host, and 2 VirtualBox guest machines running on it. One has Windows7 as well and running a MySQL 5.6 server. The other guest has Windows XP. I want to run a software (for testing ...
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2answers
366 views

UDP Flood to Host in the firewall logs

When the router's firewall logs shows as follows UDP Flood to Host PRIVATE_LAN_CLIENT_IP, PORT ->> EXTERNAL_PUBLIC_IP, PORT (from WAN Outbound). Will those packets be routed to the private lan ...
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78 views

Windows Firewall: Limit Google Chrome to only local network connections

By local network, we mean within the subnet of the computer in question. The idea is to disallow browsing of internet web pages, while allowing ones served locally. Disallowing a particular local ...
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75 views

Windows Firewall: how to block all internet traffic except ones to/from Windows Update and Antivirus update?

Should it be done via block all except Windows Update & AV Update internet IP addresses; or block all except Windows Update & AV programs (is this possible to do?) If so, how? And if ...
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1answer
62 views

Client and Server program running onto the same Windows 7 computer. Can I restrict access to the Server one via port management?

I am running Windows 7 - 64 bits. I have a program that works in client-server mode, this is: there are, in fact, two programs (a client and a server) that runs on the same Windows computer. The ...
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3answers
486 views

If you block an .exe file in Windows Firewall, are you also blocking the .dll files it uses or it needs to be done separatly?

Let's consider this scenario: There's some X software downloaded from the internet with one .exe file and several .dll files. The .exe file is prevented from accessing the Internet by using Windows ...
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1answer
329 views

telnet 500 Syntax error, command unrecognized

I'm trying to send email using telnet in cmd. I have connection with telnet now C:\Users\Student>telnet alt3.gmail-smtp-in.l.google.com 25 then it brought me here: 220 mx.google.com ESMTP ...
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1answer
51 views

Bridged routers and firewall

I have started to do quite a bit of research on securing my home security after a virus outbreak between some computers. Wanting to isolate two sets of computers, I came to the conclusion to make a ...
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1answer
2k views

How to Block Ultra Surf Proxy Client on Windows

How can I effectively block ultrasurf which is being used on our company network. With ultrasurf all web filters applied on the network are useless. Does anyone have a solution to this problem?
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32 views

Do I need to install some license on cisco firewalls

I have bought a cisco pix 525 old firewall from auction. Before resetting it to factory settings for password reset. I want to know does it need some sort of licence and do I need to enter some key ...
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93 views

How to connect to Cisco firewall using hyper terminal

I have bought the old Cisco PIX firewall 525. I connected the console cable into the firewall and serial port to my Window 7 PC. However when I start hyper terminal on com1 my cursor keeps blinking ...
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2answers
138 views

How to bypass an Internet connection that only allows access to FB and twitter

On my connection I can access FB and twitter only. How do I work around to gain access to other websites. The browser is not locked or something, Its my own laptop that am using.
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1answer
32 views

Where can I ask Windows security related questions that are not product specific [closed]

Following up from this I'd like to know if there are any Windows Security forums that are not product specific. I want to use such a forum to ask about combinations of Free Firewalls and Virus ...
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91 views

constant port scan attck detected by bullguard

please help i think i am being attacked i have the mac id... idk where else to ask this. single port scan on 16679: attack happend over 50 times then turned of wifi, detected with bull guard firewall ...
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1answer
56 views

Netgear UTM9s causes network drop off when port forwarding

Our company just installed a Netgear UTM9S and I've been trying to get our server visible to the outside world. I've gone into firewall settings and set up a new rule that states all incoming HTTP ...
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21 views

NAT to remote computer

PC A (Windows 7) can create TCP connections to PC B (Windows XP) but B can't make outbound connections to anywhere due to firewall rules. If I need B to connect to a host in the same network as A, I ...
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2answers
2k 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.
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2answers
143 views

How to find out what is blocking all ports of a windows 7 PC

In a windows 7 64 bit professional, all ports seems to be blocked/closed, ping included. I shutdown windows firewall and antivirus with no luck. Searching web dosn't help either. Any ideas on how ...
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48 views

What can Pagekite do that Apache+VPN can't do?

I run a web server at home behind a firewall. I understand that if I ran pagekite on the home web server, and on some public machine (e.g. on Amazon), I could point DNS to the Amazon server, and have ...
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3answers
3k views

Is it recommended to run a firewall/router on a virtual machine?

Googling found me people saying running a firewall/router as a virtual machine is "dangerous" but none of them gives any reason as to why it is so. I also found posts from people who are successfully ...
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1answer
68 views

configuring juniper ssg 20 VIP

We have juniper ssg 20 and wanto access our camera system from outside network. I have defined a new port(82) on Policy/Services/Custom screen. And unTrust interface I have added new VIP service for ...
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61 views

Is google using Akamaihd CDN for some of its services?

I run a few captive portal system where we have akamaihd.net whitelisted because we want users to access some of the services hosted on akamaihd.net. Problem is now users can access google.com too. ...
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2answers
203 views

Unblock Utorrents ports

Recently our company has blocked all incoming ports by default. Since then I am unable to download from torrent sites. Our network engineers allowed to open the ports for me in which uTorrent is using ...
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2answers
333 views

How does a proxy sever get past a firewall?

So my school uses a firewall called smoothwall to keep us from going to a various number of websites, so i figured out that using a proxy server, in this case its Tor, would let me get past web panel ...
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2k views

How to unblock websites that are blocked by Cyberoam?

I'm in a crazy situation as my new company blocked many sites like Gmail and Facebook by using Cyberoam. I tried https://gmail.com and then added an exception but still no luck. The url of Cyberoam is ...
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1answer
347 views

Is it safe to turn off Windows Firewall on private network?

In windows firewall there got two options, one if for private network, and the other is for public network. As I am using CCProxy for my local network and it is suggesting to turn off firewall for ...
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1answer
74 views

why iptables is accepting all in INPUT?

As we can see in this, which is the default iptables on fedora 20 $ iptables -L INPUT --line-number Chain INPUT (policy ACCEPT) num target prot opt source destination 1 ...
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1answer
645 views

Windows firewall blocks remote desktop with custom port

I was able to use my remote desktop with custom port when I was using Kaspersky Internet Security. Now, I have uninstalled my Kaspersky and switch to Avast!. Therefore, the windows firewall is turned ...
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1answer
33 views

Why are the default options for Windows Firewall exceptions to allow on public but not on private networks?

I get the following dialog whenever Windows Firewall (on Win7 SP1) catches a new program trying to get network access: Why does it allow public by default but not private? Isn't public the less ...
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1answer
33 views

Is it bad to have a stand alone firewall that disables the native system firewall?

I've heard claims that firewalls such as the one that comes with Avast are better than others that disable the system firewall. Is it correct that it could lead to problems disabling a firewall built ...
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2answers
750 views

How to block all websites but a few with Windows 7 Firewall

How to block all websites with Windows Firewall, and then allow a few websites to pass?
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1answer
57 views

VPN error 800, when remote but not locally

I am going to spend a few days in my summerhouse, and i would like to have access to all my media on my server so i am trying to set up a VPN. I have followed a guide, and i am abe to connect to the ...
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2answers
172 views

Is Iptables blocking outgoing ssh connections?

I have been trying to do pulls from github and it keeps hanging. My iptables rules have no rules which block outgoing traffic but I cannot connect to github using either ssh or http. I can't even ...
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3answers
2k views

Allow dropbox through windows firewall when everything else is blocked

Using this solution I've blocked all internet access with windows firewall and made an exception to allow local subnet traffic through the firewall. How would I allow dropbox through the firewall as ...
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1answer
174 views

scramble https over http to avoid detection by Firewall

My campus has recently installed Fortigate Firewall and have started spoofing https certs. eg. Certificates appear to be invalid saying: "Google.com; verified by Fortinet CA" Is there a way to ...
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2answers
213 views

Block incoming traffic to the specified IP behind the router

My goal is to emulate network disconnection for a video streaming server behind the router in LAN network. The only restriction which i have that this settings could not be executed on video server ...
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1answer
35 views

Forbid files by extension in Windows 7/8

I want to forbid following actions on Windows 7/8: Zip and 7Zip archives to be unpacked/executed , especially when it's a self-extracting archives Exe files to be run dll files Any mentioned ...
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107 views

Block visitor from specific IP address in Windows Server 2008

I am trying to block all access from specific IP address. I tried add Inbound Rules in Windows Firewall by blocking all connection & program from a IP address (IP address of the other test ...