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

learn more… | top users | synonyms

0
votes
0answers
118 views

Settings for printing remotely over the internet to HP Laserjet from one IP address

I'm trying to print from an Amazon/AWS EC2 instance running WinServer 2008 R2 to an HP Laserjet on our network. These are the steps taken so far: On EC2, the server services ‘LPR Port Monitor’ and ...
1
vote
0answers
36 views

Restrict Hamachi Gateway Scope / Ports

A client wants to make a couple of websites intranet-only, but still allow access at about 30 outside locations. Hamachi gateway would work nicely for this, but I do not want those computers to have ...
0
votes
1answer
150 views

Log file for ssh attempts?

I have an old Macbook running Yosemite which I've connected to the internet via my college network. I foolishly enabled ssh access while my computer had a weak password, and now I want to check my ...
0
votes
1answer
58 views

Recommended protection from inbound traffic and set up of 3 vlans on home network [closed]

There are so many questions out there on this topic without the answer I'm looking for. They talk about basics like WPA2 and how to get neighbors to stop using their Wi-Fi.... Perhaps I don't know the ...
1
vote
1answer
2k views

How can I configure my firewall to block Abobe Illustrator CC 2014 updates on Windows 7?

I have a very simple question. How can I configure my firewall to block Abobe Illustrator CC 2014 updates on Windows 7? I would like to do this properly. Thanks.
-5
votes
1answer
40 views

What is a stateful firewall and how does it work? [closed]

Could someone, please, explain what a statefull firewall is and how it works? Also, it would be helpful if you can compare it to a stateless firewall.
10
votes
4answers
30k views

How to prevent a file from accessing the internet?

There are some .exe and .dll files belonging to some programs on my laptop which communicate with the internet without my permission (for self-update generally). I want to prevent those files one by ...
1
vote
1answer
42 views

Trouble with last DROP rule in iptables

Let's say I want four ports to be opened for any incoming packets so I made this ruleset: #> iptables -L -v Chain INPUT (policy ACCEPT 20 packets, 1190 bytes) pkts bytes target prot opt in ...
0
votes
0answers
52 views

iptables do not block all traffic i want to mysql port

Need to block all incoming traffic to port 3306 but two ranges. The thing is I can connect from other ranges anyway!. Think my drop rule is ok. Why is this? ]# iptables-save # Generated by ...
0
votes
1answer
241 views

firewall blocks connection even though allowed

i am unable to make any connections whatsoever to my windows 7 machine from another machine on my network. when i turn the firewall off, i am suddenly able to make these connections. one such ...
2
votes
1answer
7k views

Windows 7 firewall causing remote connection to time out; should refuse connection

The Windows 7 Firewall is running with default options to allow outbound connections and block incoming connections. I have a process trying to connect regularly from within my local network, which is ...
0
votes
1answer
471 views

Telnet cannot connect to localhost on port 23

I am using bat file assigned with vbs script to change router configuration every 15 minutes through the day through telnet commands. It works as supposed for a while then it shows this message "Could ...
1
vote
2answers
494 views

Firewall in front of device with public IP address

Is it possible to have a firewall in front of a device with a public IP address without getting in the middle of NAT? I have a server that I need to put on the internet, but I want to put a firewall ...
2
votes
2answers
4k views

Detect what outgoing ports are bypassed by firewall

My school has a firewall which limits most outgoing ports. There're only TCP/80, TCP/443, TCP/21 allowed. Is there's a way to find out all the outgoing port allowed by the firewall? My current idea: ...
0
votes
2answers
2k 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 ...
0
votes
0answers
70 views

Open firewall port on Mac OS X

I need to open port 8181 on my Mac OS X. On Linux, I would do: iptables -t filter -A INPUT -p tcp --dport 1664 -j ACCEPT iptables -t filter -A OUTPUT -p tcp --dport 1664 -j ACCEPT How do I do this ...
0
votes
0answers
270 views

License Manager for Matlab is unable to connect to the license server. License Manager Error 96

I am using Matlab R2014a. The license has been provided by the college. As soon as I launch the software, I get a following error message. I tried to ping the server addresses, and the were ...
0
votes
1answer
125 views

Lync keeps dropping because of D-Link DIR-601 router. How to configure firewall to fix this?

I saw this article, and it's exactly my problem, but my settings are a bit different and nothing seems to have fixed it so far. Why does my D-Link Router keeps dropping my Outlook and Lync ...
2
votes
2answers
580 views

FTP not accessible outside of LAN

Ok so I really need some help with this, I have XAMPP installed and am hosting a webiste with it for my friends and i to work on. I am able to see the site just fine and also i am able to get to ...
4
votes
3answers
4k views

Configure OSX Firewall to Allow SSH Server?

If I turn on my OSX firewall, ssh is disallowed. If I turn it off, ssh can connect just fine. These are the settings from the ssh host: while I don't know what I'm doing, I figured that giving ...
3
votes
4answers
590 views

How does a firewall contribute in mitigating IP spoofing attacks?

I understand that you can implement a firewall to only allow access to a server from specific IP addresses, but can't people fake the source IP address in a TCP packet? How does this actually stop ...
2
votes
6answers
136 views

Software and hardware firewalls

I'm connecting to the internet through a router at the moment, a Linksys WRT54G, do I need to have a software firewall set up? It seems kind of redundant if you're never going to directly connect to ...
0
votes
4answers
5k views

Firewall blocks websocket

Firewall (kaspersky/avast) blocked messages when I using websocket server (socket.io on node.js), what can i do? (except change default setting in firewall) port 8080 or 8000 thx a lot
0
votes
1answer
93 views

Limit Netgear Nighthawk AC1750 to given WAN IPs

I have a Netgear Nighthawk AC1750 router, and have SSH, HTTP, and several other ports forwarded to a server. It is not for public use, and will only be accessed by me. I've recently had 60,000 hits ...
0
votes
1answer
366 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 ...
0
votes
1answer
159 views

Windows NTP Client Not Syncing with my ESXi NTP Server

I have an ESXi 5.1 server configured as a NTP server and a local Windows Server 2008 R2 PC that aren't syncing. I've read that whenever an ESXi server is run as a client, it also acts as a server, so ...
0
votes
1answer
69 views

iptables on debian blocking git pull, http api requests etc

I am using IPTables on an API server to block all incoming traffic except for SSH, HTTP and HTTPS. I need to have full access on the loopback interface to run beanstalkd amongst other things, and need ...
0
votes
1answer
33 views

Should I allow or deny helpd file to establish connection in my Firewall on Mac OSX 10.8.5?

As in the subject line. Should I allow or deny helpd file to establish connection in my Firewall on Mac OSX 10.8.5? I would appreciate answer to that and more elaborate answer what exactly "helpd" ...
0
votes
1answer
156 views

How to whitelist (Windows Firewall) a program using the Java runtime?

I am using Windows Firewall on a Windows 7 laptop to block outgoing connections by default. I want to allow SurveyCTO, which requires Java, to sync with a remote server. Even with "Allow" rules for ...
0
votes
0answers
14 views

Making a server “read only” except for me (what the inbound/outbound rules mean)

I have an ec2 instance. It will start a webserver, and my public ip is myip. I ssh into my machine. What should incoming and outgoing rules? Why? I want only my ip to be able to change things on the ...
0
votes
0answers
18 views

Database showing a list of current vulnerabilities?

I have been recently building my own firewall, but I was wondering is there a website or database which lists majority of the known vulnerabilities so I could obviously update my firewall based on the ...
0
votes
0answers
13 views

vSphere Directpath NIC isolation

I am building an home server, and I am planning to use VMWare vSphere to create multiple OS that will have precise tasks on the server. On the server, I'd like to have a firewall-antivirus using ...
6
votes
1answer
766 views

How to easily determine, which outbound ports aren't blocked by firewall

I'm behind fairly restrictive firewall regarding ports, that can be used for connecting outside. I'm also running service on my remote box, and I want to connect to it. Problem is, that I'm unable to ...
0
votes
0answers
337 views

Can't telnet to port 3389 on computer on same network

I have two Windows 8.1 pro computers on the same network using the same FIOS router. On the first computer, I can telnet to localhost 3389. On the second computer, I can't telnet to the first's IP ...
-1
votes
1answer
49 views

Isolate computer network card from main OS

I am starting a project with my old computer, planning to make it into an economic multifunction server, but I am new to networking, servers, virtualization and firewall-Antivirus-Anti-spam software. ...
1
vote
1answer
99 views

How can I block ads on Windows 8.1 Book Reader? [closed]

When I read epub books using Windows 8.1 Book Reader, I see ads at the bottom of the screen. I have tried to change settings in the default firewall included with Windows to no avail. I downloaded ...
0
votes
1answer
71 views

No internet through OpenVPN

I am having trouble with my OpenVPN setup. I have a Linode box with an OpenVPN server installed on it and I managed to get Tunnelblick to establish a vpn connection from my mac. I followed this guide ...
0
votes
0answers
11 views

Can you add a proxy exception with an exception?

Is there a way to add an proxy exception with somewhat of a case match so to speak? so say I want to allow all https, I would use: https://* but I dont want it to apply to https://testsite.com ...
0
votes
0answers
39 views

Turning off windows firewall

I did the most idiotic thing I can think off: created a firewall rule for a windows azure VPS to block all incoming traffic, on all ports. Now I can't access the VPS, obviously. Any idea how to ...
0
votes
0answers
74 views

My router bypass the DNS servers I manually entered

I wanted to change the default DNS so as to use OpenDNS ones. I went to the router (192.168.0.1) and then put the DNS adress of OpenDNS in the WAN connection settings. It works and my computer ...
-6
votes
1answer
2k views

How to bypass a firewall which asks for username and password [closed]

Here in my college we have a firewall installed by Fortinet. Whenever we open Firefox it asks for a username and password ... Once we enter that, accessing the internet is possible but with very very ...
0
votes
1answer
2k views

Connecting to SSH from behind an HTTP proxy

I'm behind a corporate network with an HTTP proxy. I also have an SSH server to reach on port 22. I don't have any kind of control over that server: I'm not root and even if I were I'm not allowed to ...
1
vote
2answers
107 views

Iptables rules to only whitelist SIP providers

I have an Asterisk box sitting behind an ADSL router/modem. There are no other services on the Asterisk box, just telephony. I am getting a lot of traffic which I think are SIP probes. I've ...
7
votes
3answers
2k views

Mac firewall blocking nginx (port 80) from external side

I installed nginx using ports and started it with sudo. Accessing the nginx welcome page from localhost works perfectly, however accessing it from an external computer fails. Doing an nmap on the ...
-1
votes
1answer
78 views

My Juniper SRX System-Retry-Options not works, Why?

I have a Juniper-SRX and I want to configure its System-Retry-Options in a way that after 5 unsuccessful attempts to logins for a particular username the device gets locked for the user for 4 ...
2
votes
2answers
83 views

Logitech Support telling us we have an unsecure network and trying to charge $99?

My boss is trying to set up a Logitech Webcam on his computer in the office and he called Logitech support, and they were trying to fix it and could not so he let him on his computer he said he could ...
0
votes
0answers
16 views

iptable definitions for routing and defence

I'm attempting to configure a firewall on my laptop that allows for routing. The main trick is, I don't want to allow for connections to be made that do not fall under the ESTABLISHED,RELATED ...
3
votes
2answers
6k views

Deny all incoming connections with iptables?

I want to make some simple iptables rules to deny all incoming connections and allow outgoing. How can I do that?
2
votes
3answers
221 views

How Do I Block a Host by ASN? Example - AS16276

There are a handful of especially toxic hosts out there. There is no reason we need to allow any of their IP's access to our servers. Is there a way we can block them using their ASN or other global ...
0
votes
0answers
31 views

browsing difficulties airline websites blocked

I am having problems connectiong to various airline websites. Problem is only on my desktop and not on a laptop which connects to the same router. Problem is irrespective of browser - ...