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

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6 views

Sharepoint site and Excel files often prompting for login when accessed from corporate network

Since about one month ago a number of users have been experiencing problems accessing a Sharepoint 2010 system we have hosted externally. They are prompted to enter their login details when accessing ...
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9 views

Remove Avast Firewall NDIS Filter Miniport?

First of all, I would like to know what is Avast Firewall NDIS Filter Miniport(and what the hell it has to do with my pc even after uninstalling Avast IS). Then, How can I remove it from my pc? ...
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7 views

ZyXell ZyWall USG 100 - Port forwarding using router

I have the Zywall USG 100 and a ISP own router. I need to use the firewall but there is a problem: the ISP router "can't convert into a pure modem,". I can only deactivate DHCP and NAPT. And can't set ...
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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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2answers
2k views

Why my Port Forwarding rule is not working?

I'm a total noob about TCP/IP, and try to set a port forwarding rule. What I'm trying to do is this: I have multiple computers connected to my router (zyxel p-660hw-t1 v2), one of them is working ...
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2answers
21 views

Bridging Firewall to Public Wifi

My building offers wifi to its residents. It is not managed by IT professionals. I would like to use this internet source some of the time, but would like to be protected from machines on that ...
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2answers
4k 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 Adobe Illustrator CC 2014 updates on Windows 7?
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1answer
14 views

KODI remote isn't working

I'm trying to correctly configure KORE, the official Kodi Remote app for Android, but I'm unable to do so. My copy of Kodi is installed on a laptop with openSUSE as a base system, and both it and my ...
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12 views

BSD Packet Filter Redirect Internal traffic

I'm using OSX Yosemite with Packet Filter (BSD). Is there a way to redirect internal originating traffic (let's say from en1) to lo0 on a specific port for specific destinations? rdr from what I ...
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0answers
41 views

A Linux Firewall/Web-proxy suited to a blacklist-by-default policy for a single desktop [on hold]

I am looking for a (suite of) tool(s) to strictly control outbound access to a small whitelist of globally deployed web-sites, for one Linux desktop (with one user). I am looking for a solution with ...
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10 views

How to redirect traffic to a fixed IP address in Fwbuilder

I'm new to fwbuilder and I want to redirect all incoming wifi traffic to my web server. I tried many iptables command but I've failed so I came up to GUI firewall. Can anyone suggest how to do it?
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4answers
13k 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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19 views

Telnet says trying- network issue

My network resource is telling me that "syn" packet is not being sent from client to firewall. HOw do we go about troubleshooting this, why do a packet capture from the client when we know the issue ...
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2answers
68 views

Windows 8: want to force a specific website be opened only by one of two internet lines avialable

I have a PC with win 8 with two different available wifi internet lines available. I want to to force a specific website be opened only by only one of internet connection and other websites be opened ...
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1answer
8 views

Block ICMP flood from a specific IP with pf

I'm getting a lot of ICMP throttle messages in my system.log: Apr 11 20:45:28 kernel[0]: Limiting icmp unreach response from 1054 to 250 packets per second Apr 11 20:45:29 kernel[0]: Limiting icmp ...
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1answer
18 views

Low resource Firewall/Anti-Virus for older XP machines? [closed]

Any one know of some good, memory/CPU efficient Firewall and/or Anti-Virus applications? I have some older machines running XP (I know, I know, I know) and need some suggestions to help give them ...
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1answer
20 views

Synology ssh port receiving too many intrusion attacks, how to ban systematically?

I have a synology NAS which I leave at home, and leave it open so I can access it remotely from the office. One of the useful things to do is enable the ssh port so I can access it with my terminal. ...
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27 views

Find out why I cannot download from a specific site

I'm running Windows 8.1 SL trying to download the Desktop app from: http://www.systemrequirementslab.com/cyri However, when I get to the download page ...
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24 views

No internet access exclamation mark appears across LAN

I have some problems with my domain network. we have about 100 - 125 PC's in our office and they are connected to domain.we use windows server 2012 as a domain controller.most of the computers connect ...
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12 views

PF rule using return-rst on Mac OS X does not reply with TCP reset

I'm trying to add a simple PF rule: block return-rst out proto tcp from any to any port 33128 to filter all outgoing traffic to TCP port 33128, and I'd like it to respond with a reset. However, ...
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1answer
36 views

Port translation - how to scatter outbound traffic across random ports?

I would like to be able to PAT such that outbound traffic for a given destination port is translated to some random port within a range on a per-PDU or per-packet basis. The intention is that ...
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2answers
19 views

Repercussions of opening ports for applications on router

I know there's a security risk with forwarding ports on my router to a computer on my network for applications like teamspeak or minecraft. However, I haven't seen any clear explanations of what the ...
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2answers
3k views

What does an empty iptables mean?

I’m using CentOS and when type in the following iptables command: iptables -L -v The output is as follows: Chain INPUT (policy ACCEPT 19614 packets, 2312K bytes) pkts bytes target prot opt in ...
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0answers
12 views

FTP timeout to web host

Macbook pro 10.9.5 regular web host (cPanel) router firewall set to low machine firewall off proper login credentials Filezilla/Cyberduck Telnet to 198.252.106.222 21 does not connect FTP ...
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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 ...
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1answer
45 views

How to block all traffic but one IP in windows firewall using command line

I have a project and for it I need to only allow connections in from a certain subnet, everything else must be dropped. The catch is that its all going to be automated, no user interaction, there for ...
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1answer
29 views

Can't open Minecraft Server for Internet

I followed all the steps for hosting a Minecraft Server: Allowing connection (inbound and outbound, TCP and UDP) to port 25565 on Windows Firewall. Forwarding ports on router configuration (TCP and ...
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1answer
2k views

Not being able to block a site in ccproxy server

I have installed ccproxy server and have setup firefox to use this proxy server. Now I am trying out different features of proxy server. For testing purpose, I want to check blocking of ...
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1answer
3k views

Block websites to a certain IP range with mikrotik router

I have a MikroTik Router 951Ui-2HnD that connects my computers with the ISP. I want to block Youtube and Facebook but only in a few computers. I created a Layer7 Protocol with: Name : Denied Websites ...
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18 views

CentOS as home network router: IPTables Port Forwarding failure

I have currently set up a home server with a CentOS 6.6 installation on it. The server has two NIC interfaces which I'm using it as my router and DHCP server. Here's a diagram showing the network ...
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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 ...
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4answers
9k views

When the Windows Firewall Service is disabled I cannot remote desktop (RDP) to the machine

When the Windows Firewall Service is disabled I cannot remote desktop (RDP) to the machine. Has anyone seen this? This is on Win7 64 Enterprise on a domain. Is it some sort of domain policy perhaps? ...
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3answers
2k views

Windows 8.1 update service error code: 80240438

I updated to Win 8.1 recently and I've got this issue. In windows firewall I block all inbound connections and all outbound connections that do not match a firewall rule. I create a custom firewall ...
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1answer
3k 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 ...
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28 views

IP adress for debian.org and debian.net

we are enforcing a strict firewall policy at my firm and are whitelisting adresses on the internet. My issue is this : I need to get a list of IPs (or at least a subnet) for standard debian update ...
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1answer
178 views

Amazonaws blocked by modem?

since some time i have the following problem: I can't download a .exe file (in my case the "Minecraft.exe" file) from s3.amazonaws. It does not work on 2 laptops, which are connected with a Vodafone ...
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1answer
3k views

How can I use Windows Firewall to only permit the Windows Update service to make an outbound connection?

I'm trying to tailor my Windows Firewall settings (using the Windows Firewall with Advanced Security console) to only permit programs that need to access the Internet with an outbound connection to do ...
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14 views

NAT Rule for PPTP Port Forwading

I'm under a very heavy firewall where only very common ports such as 21 and 80 are open. I installed PPTP on my own dedicated server (a Debian Linux) and I`m trying to connect it using Windows, but ...
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41 views

Cisco ASA 5505 doesn't allow internet connection

This is my Cisco ASA 5505 "show run": : Saved : ASA Version 8.2(5) ! hostname LAB-ASA domain-name TEST.com enable password X encrypted passwd X encrypted names name 192.168.1.0 AsusWireless ! ...
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25 views

Windows 7 firewall rules doesn't work for FTP server

I have installed FTP server and set up an FTP site on Windows 7. I'm trying to connect to it via a Linux machine but the connection times out if the Home or work (private) networks firewall is on. ...
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1answer
2k 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 ...
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0answers
25 views

how to specifically disable one software from connecting to internet?

so there is this presentation software called prezi. Its business model is this: If you have a free account, the presentation you created will be automatically upload to the cloud and be public, but ...
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1answer
43 views

Need clarification for Sonicwall “Public Server” wizard NAS policies

I used the SonicWall TZ105 "Public Server" wizard to add NAT policies for an internal (non-DMZ) server, but I do not understand the need for all the Custom policies that resulted: # Source ...
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0answers
98 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 ...
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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 ...
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18 views

Sonciwall SNMP configuration

I'm playing with some old Sonciwall and i like to configure with SNMP. All doc. and google iv done are the same procedure. System > Administration > SNMP Enabled ( community string etc. ). 2-step: ...
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1answer
12k 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?
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1answer
6k 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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1answer
63 views

RPC Connection Filtered with no Firewalls

I have a workstation (PC1) that cannot communicate with a domain controller over RPC (TCP/135). C:\PortQryV2> portqry.exe -n 192.168.1.1 -p tcp -o 135 Querying target system called: 192.168.1.1 ...
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1answer
88 views

How do I set a static IP address for a particular MAC address on a Cisco DPC3825 router

How do I set a static IP address for this router: http://www.cisco.com/web/consumer/support/modem_DPC3825.html so that a specific MAC address always gets the same IP address.