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

learn more… | top users | synonyms

3
votes
0answers
503 views

Remote desktop on custom ports

We have an office with a Windows 2003 SBS server and a couple of workstations. I set up Microsoft remote desktop for each of the computer in such a way that anyone could remote into the computers ...
0
votes
0answers
17 views

Re-connect to corporate firewall

When I power on my PC, the default internet browser open the page: http://go.microsoft.com/fwlink/?LinkID=219472&clcid=0x409 then I have to enter my credentials to access internet. Every time, I ...
0
votes
1answer
47 views

Would using a public IP address range on a private LAN cause issues?

A client are having problems with their internet connection. Pings 3 or 4 times then times out for a minute or so. The ISP have taken a look at said they can get a connection just fine to the Cisco ...
0
votes
0answers
34 views

Set a max for number of failed password log in attempts in juniper srx

Normally my Juniper-SRX doesn't delimit number of failed log in attempts. I want to know if is there any way to change settings in a way that after for example 3 failed attempt, that user locked for ...
7
votes
4answers
1k views

Parental control or outbound firewall?

Based on the Age distribution of Stack Overflow users some of you might also have kids in the ages when certain images can be very disturbing. An age when they cannot yet decide by themselves what ...
2
votes
2answers
405 views

Can the Snow Leopard firewall remember my choices?

I have the Snow Leopard firewall switched on. Every now and then, it asks if I'd like to allow or deny network connections for an app. I make a choice, and every time I open the app it asks me again. ...
0
votes
0answers
35 views

Netsh firewall: allow a port just for a single interface

In Win7 with netsh I would like to allow a listening port only on a single interface and block it on all the other interfaces. With the GUI this is possible using the "Protected Network ...
1
vote
2answers
4k views

Windows 7 firewall: Block all incoming requests from a certain IP

How can I modify the Windows 7 firewall to block all incoming requests from a certain IP in my network? In "Windows Firewall with Advanced Security", I can define new rules. However, none of the ...
0
votes
2answers
62 views

Firewalling VirtualBox: restrict host inbound connections to guests only

I have Windows7 + Cygwin and VirtualBox. I would open a listening port on the host accepting only inbound connections from the VMs. Note: In many case the server services running on the host can be ...
0
votes
0answers
206 views

Norton Internet Security 2012's Firewall Is Blocking My Internet Access?

I am running Windows Vista; last week my Norton Internet Security expired, and I had to renew. After installing Norton Internet Security 2012 I am unable to connect to the internet. I think that ...
0
votes
0answers
34 views

Open ports for Age of empires in ubuntu router using iptables

The purpose of this question is to learn how to correctly use iptables. As I am currently living in the dormitories in the University and I am using a small netbook as a router to provide wifi in my ...
0
votes
2answers
98 views

Linux blocks my ports, how to unblock it?

I use Centos 7. I disabled iptables: sudo service iptables stop sudo chkconfig iptables off I also disbaled SeLinux: $sestatus SELinux status: disabled But ports are bolcked. ...
0
votes
1answer
55 views

Set block time with iptables

I have the following rules in ufw, for iptables: -A ufw-user-input -p tcp --dport 80 -m state --state NEW -m recent --set -A ufw-user-input -p tcp --dport 80 -m state --state NEW -m recent --update ...
0
votes
0answers
61 views

How to ban thousands of IP addresses on 2008 Server

I'm trying to block the Tor Project network from my webserver as many spam/malicous scripts are using it to flood my API. I've tried almost every method possible it seems there is NO WAY to append ...
4
votes
4answers
4k views

how to ssh two computers behind NAT and Firewall, without third computer

I am trying to ssh into my Linux box at home. My home is a dorm-style environment - NAT and Firewall with personal laptop running Arch Linux. My work is corporate style Windows 7 - NAT and proxy ...
-1
votes
1answer
3k 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?
0
votes
0answers
43 views

OpenShift Origin: isolating application containers from local network

My network with OpenShift Origin is setup like this: A firewall running pfSense (172.16.0.1 + external IP) A ProCurve J9029A switch (if that helps...) An Ubuntu-based Virtualbox hypervisor ...
0
votes
1answer
51 views

How to catch a tcp packet in windows?

I've got Windows 2003 server and i see in my firewall logs some denied tcp packets: about 1-5 per hour. It looks like that: 18:20:37 tcp 192.168.xx.y(4994) -> 104.28.25.67(80), 1 packet 18:39:15 ...
0
votes
0answers
69 views

If my firewall is switched off,what else could be blocking access to mysql?

I want to have remote access to my mysql server but when i telnet my server from my computer i get this C:\Users\USER>telnet 197.000.0.00 3306 Connecting To 197.000.0.00...Could not open ...
0
votes
0answers
77 views

M0n0wall Firewall Not Allow Traffic from Different Networks

I have a fairly simple home network set up. First off I have a VMware ESXi server running some VMs. I have an Extreme Networks x250e-48t switch doing all of my routing between the several VLANs I ...
1
vote
1answer
28 views

How to whitelist which programs can access the internet

I'm sure its been posted somewhere, but I cant find it anywhere. I am running a Windows 7, and preferably would like to use Windows Firewall, but any other firewalls that will do the job will be ...
0
votes
1answer
257 views

Block all IP except few in Windows Firewall [closed]

Multiple windows firewall rules are ANDed together or ORed? Background: I have a SQL database server running on a public cloud virtual machine. I have configured allow connection inbound rule in ...
4
votes
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 ...
1
vote
2answers
181 views

How to access the setup wizard on Sonicwall TZ 100 firewall

I am trying to setup a TZ 100 firewall. I am following these instructions and I have attempted to follow these instructions: "Connect your computer to the LAN (X0) port on the SonicWALL. Connect an ...
1
vote
1answer
467 views

Can we prevent vsmon.exe (ZoneAlarm True Vector service) from hijacking TCP connections

I just noticed that vsmon.exe from ZoneAlarm firewall started to act like proxy for TCP connections (I am guessing it's doing the same thing for UDP packets internally). I use TCPView.exe from ...
0
votes
1answer
112 views

Configure iptables firewall to allow DHCP, DNS, HTTP, SMTP, FTP, IMAP, POP, and Squid ports – deny all other services.

Configure iptables firewall to allow DHCP, DNS, HTTP, SMTP, FTP, IMAP, POP, and Squid ports – deny all other services. 1 pc for router ( place firewall) 1 pc for server ( place web,dhcp,ftp,etc)
0
votes
0answers
30 views

Firewall Ubuntu UFW port 22

I use ufw firewall, on port 22. I have given the command: sudo ufw allow from a.b.c.d to any port 22. sudo ufw status output looks like: To Action From 22 allow a.b.c.d The OS is ...
2
votes
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
votes
1answer
555 views

Difference between iptables default policy to `DROP` and inserting a seperate policy in input chain to DROP all connections

I'm trying to DROP all incoming connections to my server, except from particular networks. At the same time I want to keep all outgoing connections from my server to external network (any network over ...
0
votes
4answers
112 views

IPtables keeps resetting rules and blocking almost everything

Every time I reset IPtables, the rules keep coming back in about 10 minutes, blocking everything besides port 22 and 80. When I do a "iptables-save", I see this I can't find out where it's coming ...
-1
votes
1answer
627 views

Windows 7 Firewall blocks incoming connection even though there is an “allow” rule

I'm running a (.net WCF) HTTP Service on 0.0.0.0:60001 and a remote client - on the same network - can't connect. Looking at the windows event log, i can see two related events: Event ID 5152, The ...
0
votes
0answers
62 views

Mac port issue with Nginx and Tomcat

Configured Nginx to interact with Tomcat on port 9090 on mac. This configuration works when querying on localhost. Fails to work when connecting from outside, until firewall is disabled. I have ...
1
vote
1answer
130 views

Most secure way to have IPtables auto-loaded using Debian / Linux

I'd like to know the safest way to load iptables using Debian. Of course, I can use a script that uses iptables-restore : #!/bin/sh iptables-restore < /etc/firewall.conf but : 1) where is the ...
1
vote
2answers
6k views

How to configure LAN IP Filter on Huawei E586 UMTS Modem

I need to prevent clients of an Huawei E586 UMTS to WiFi modem from downloading much data from specific servers eg. Windows update or OSX update. On the config page of the device there's an "LAN IP ...
1
vote
1answer
53 views

UDP port scanning

UDP is connectionless, so I can't expect a response packet, necessarily. If the port is closed, I might get an ICMP error message, but if the firewall could silently drop the ICMP packet How could I ...
1
vote
1answer
261 views

Process vsserv.exe attempts connection to unknown host (clients.your-server.de)

from past few day I notice a new connection is being made from my system, I discovered it within the outpost firewall, it is blocked by default with the reason Block Transit Packets in the image ...
0
votes
0answers
38 views

Opening a firewall port on virtualized Windows 7 running on Mac OS X 10.9

I am currently using a virtual machine running Windows 7 (32-bit) which is hosted by the VirtualBox application from Oracle; this latter is installed on a MacBook with the last up-to-date version of ...
0
votes
0answers
28 views

Local Network Addresses Visible to ISP

While I was on a support call with my ISP, their network engineer started listing IP addresses that were visible to him on my local network. He was right on the money as far as IPs that were up. I'd ...
0
votes
0answers
83 views

Output port redirect with firewalld?

I'm used to iptables and I can't find a way to do this with firewalld. I need to redirect the output traffic of one port back inside in the same port, basically this: iptables -t nat -A OUTPUT -p tcp ...
0
votes
3answers
56 views

I can ssh out but not in. Reversible?

I have an account on a server inside my corporate network. I also have a VPS from Linode. I can ssh from the corporate server to the Linode VPS or to my home computer with no problems. But thanks to ...
0
votes
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:
1
vote
1answer
68 views

opened port on router for java socket

I am trying to make a peer to peer application and I want a port to exchange connection information and I want to ensure that this port would not be closed from the firewall on the way between peers ...
0
votes
2answers
36 views

VNC (or RDP) server using outbound connection only

How do I set up a VNC server that connects to an intermediary server to start an outbound communication, that can be used by a VNC client. This way the port forwarding doesn't need to be set up, and ...
0
votes
0answers
82 views

firewall detecting outgoing connections of weird hostnames

Recently, I am monitoring every outgoing connection with the help of my firewall. Sometimes when I want to connect to the Internet I receive alerts that some strange looking hostname is going to have ...
0
votes
0answers
20 views

I have a Windows Server 2012 which I would like to access only port 3389 and block other ports

I have a Windows Server 2012 which I would like to access only port 3389 and block other ports. Is this something that is doable? Maybe with the Windows Firewall?
0
votes
0answers
61 views

Cannot connect to tomcat on 8084

Tomcat seems to be running, but the browser cannot connect to it. Here is the netstat output. UC180375@UC180375-TPD-A /cygdrive/c/Programs/PortQryV2 $ tasklist | grep java.exe java.exe ...
4
votes
2answers
488 views

Prevent specific application from using metered network connection

Windows 8 introduces the new category of metered network connections. Applications that are aware of this type of connection can choose not to use it in an effort to reduce connection costs. I would ...
6
votes
3answers
410 views

Redirect ALL web traffic through TLS without a VPN

Assumptions: Server: I have a Debian Squeeze server, routable on the public Internet, with a static IPv4 address. I have unrestricted access to modify the software on the server. The server can ...
0
votes
3answers
48 views

Is the any way other then ping to detect internet connection?

I have a rails server (Linux). I can open the site with machine A. Using machine B I just can use ssh port to connect it, but it cannot open the site and the rails server cannot detect the http ...
0
votes
1answer
1k views

How to permanently disable firewall in Red Hat Linux

I have followed the below steps to disable the firewall in Linux. After reboot, again firewall is enabled. How to disable firewall permanently? Login as the root user. Next enter the following three ...