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

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what ports to open up for GitHub to install and work?

I want to use GitHub on a server where user accounts are not supposed to be able to go online otherwise. The GitHub Windows app does not even install without users' downloading it themselves (see my ...
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2answers
265 views

SSH to a computer behind a firewall and router

I'm trying to connect to my Raspberry Pi, which is behind a router and a firewall. My PC (running linux) is also behind a router and firewall. Both firewalls only allow the ports you would need for ...
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2answers
47 views

Is Microsoft's Photosynth app blocked in China?

I've been making photosynths for a few years on my travels but in China I can't seem to log in via the Photosynth app. I get this error: (In fact I hadn't realized until now that it's tied in to ...
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1answer
69 views

How are they blocking RDP on port 80?

I'm on a corporate computer that is behind a very restrictive firewall, and trying to connect to my home computer. I configured my router to forward port 80 to 3389 (RDP port). My idea was to try to ...
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1answer
740 views

Samba server cannot be access across the internet

I have a computer at my house running Ubuntu Server 12.04 that is mapped to an external ip address. The server is running a Samba server with one share. Here is the configuration file: ... ...
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1answer
40 views

Setting up port 3360 access on McAfee firewall using windows 7 for network access

I have a windows 7 machine serving me PHP / mySQL etc i have set is all up well and is all working on local machine as well as on local network machines. My issue is that when i try to connect ...
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0answers
438 views

Opening port on mac os x (mavericks) for nodejs

I am running a node.js app locally and would like to make it available for demo for outside world. It is running on port 3000. I have added node to the firewall to allow incoming connections but ...
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2answers
400 views

Wifi router blocks wireless peers from connecting each other

What option controls that wifi router blocks wifi peers from connecting each other. I have wifi router Dlink Dir-320. With that router I can't ping (or connect via FTP or HTTP) one laptop from ...
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1answer
122 views

Configure Packet Filter with white-list and black-list

I’m trying to configure Packet Filter on a FreeBSD server with a black-list of addresses/networks to block and a white-list of trusted users which cannot be blocked (black-listed). Here is my first ...
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2answers
785 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 ...
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1answer
111 views

iptables detects clients behind NAT?

I'm setting up a server that I want to protect from DoS attacks, by setting a limit using iptables: iptables -A INPUT -p tcp --dport 80 -m limit --limit 25/minute --limit-burst 100 -j ACCEPT (default ...
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0answers
153 views

Secure reverse UltraVNC connection to bypass firewall

My clients and service run on mostly Windows 7. I need help setting up a secure reverse connection with UltraVNC between me and a client.(Me=Viewer, Client=Server) Here is my situation: I want to ...
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1answer
41 views

How to check company firewall

I am trying to ping to an external APIs IP address. But the command times out sooner than its completion. Now I think the company firewall and proxy might be a hindrance in this. How do I check the ...
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1answer
77 views

How to use google search via SSH tunnel?

I live behind the Great Firewall of China (not very proud of it) and I'm slightly technical. So I use SSH tunnel to route all connection to my VPS. (i.e. ssh -D port and then set localhost:port as a ...
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0answers
77 views

Setting home computer as www web server

I know I'm seriously missing some steps. I need to set my home Fedora 19 running computer as a web server and available it to internet. Its behind a normal home broadband modem connection. my ip ...
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1answer
75 views

how to restore iptables after iptables -F?

I used iptables -F on my machine, and what can I do to recover the iptables into the default without rebooting my machine? I restarted the iptables service and it failed, and I can't find iptables ...
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3answers
3k views

How can I turn off internet for roommates that haven't paid the bill this month?

I have several roommates who split my internet bill with me each month. On occasion they forget to pay me, and I have to pester them for the money. If after 3 days of pestering they still haven't ...
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0answers
30 views

Download stops in all browsers and download managers on Windows XP

I have Windows XP on my desktop and I can't download anything on it. Download stops after a few seconds or even doesn't start. I've tried using Firefox, Chrome, IE, different download managers, but ...
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40 views

Windows update not working with devices that have outbound firewall rules

We currently have devices that have all outbound traffic blocked with the exception of certain applications such as Google Chrome, Internet Explorer, etc. This however limits access to Windows Update ...
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2answers
644 views

Connecting PS4 through SonicWall TZ100 firewall | Sony Error NW 31162-3

I am attempting to Connect my PlayStation 4 through my SonicWall TZ100. I have below Ports Forwarded. I'm not great with Packet capturing, but as far as I can tell nothing is getting bounced that is ...
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0answers
384 views

Is Comodo Firewall and Zonealarm Firewall compatible with avast free 2014?

on windows 8.1 currently using avast free antivirus 2014 ,is it possible to use free firewall like comodo or zonealarm with it simultaneously with avast?After installing any will problem occur?
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2answers
584 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
135 views

Iptables limit user access time and mac

I am trying to create an iptable chain to kick my daughter off her ipad during the night. With the mac only filter I can block access but when I add time it no longer works. Does anyone see an issue ...
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2answers
128 views

Action Center cannot switch on Windows Firewall

I can't seem to switch on my Windows Firewall no matter what! List of things that I have tried and hasn't worked for me-> Disabled Avast Antivirus(free) and tried switching on Went to services.msc> ...
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1answer
600 views

netsh, block all IP addresses in a text file?

Is there a way for me to import a .txt file (with IP addresses on each line) into Windows Firewall? I want each of the IP addresses to be completely blocked. That would also provide an easy way to ...
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1answer
177 views

With ufw, how do I limit SSH from outside, and not from inside?

Using UFW, limiting connection attempts for things like SSH is real easy: # ufw limit SSH However, I'd like to limit only the public-facing interface, not the LAN interface. This command does it ...
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74 views

Any way to see ddwrt logs with website/PC names etc?

We used to have a dlink dir655 router that had logs in the interface. The logs were simple,easy to read, and had the name of the computers, iphones, etc on it. This made it easy to pinpoint who was ...
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2answers
243 views

Packet filter logging [currently with tcpdump in background as root]

I am running OS X Mavericks and use the "packet filter" firewall. However, it seems that "pflogd" is not available. I found that you can create an interface named pflog0 and then use tcpdump to see ...
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130 views

Cannot fetch urls from outside the browser

I am trying to clone a small repo on my Windows 7 PC using 'msysgit' bash command like as follows: talha.ahmed@ICE-088 /d/talha.ahmed/workspace/repos $ git clone https://github.com/torvalds/linux ...
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50 views

Windows - MAC address whitelist on wired network?

In Windows (XP or 7), is it possible to configure either Windows, a software firewall, or network cards such that the computer will only communicate with specific known MAC addresses (e.g. the MAC ...
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2answers
795 views

Filezilla connection - port blocked?

Since this morning I am unable to make a update with many files (i try to update the piwikinstallation, requires me to upload about 24mb). After a while, filezilla gets the answer from server, that ...
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51 views

Give external parties access to web servers behind the firewall

I work in an AM-project as a consultant against three customers. We have a file server and a TFS server where all project related are saved. The problem is that it is behind the corporate firewall ...
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191 views

Dropping Packets with Openvswitch Openflowcontrol

I am trying to setup some Flows with ovs-ofctl to block all unwanted incoming packets for a VM. The commands I use are: ovs-ofctl add-flow xenbr0 "priority=65000, table=0, tcp, dl_src=*, nw_src=*, ...
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1answer
72 views

Remote Desktop IP conflict

We have several outside users who connect to our server using the external IP. Everything has been configured correctly and it has worked for several years. Two days ago we had a test firewall (new ...
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1answer
167 views

Network Error: No connection could be made because the target machine actively refused it

I'm trying to bootstrap a server via Chef (using winrm), but continue to get the message: Network Error: No connection could be made because the target machine actively refused it I've opened the ...
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1answer
50 views

How can one verify the port configuration of a firewall?

I am a contractor on a project and have provided a port configuration requirement to the Server Hosting service provider for my project. How can I verify that the ports are configured and "open" for ...
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1answer
200 views

Iptables filtering and NAT with secondary IP address

I have two IP addresses on my physical eth interface. Lets say 192.168.10.7 (eth0:0) and 192.168.0.7 (eth0). So it works. But I use application, working on the only one of this addresses on port ...
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22 views

Allow Windows Update with Firewall set to block all outbound [duplicate]

I'm using Windows 8.1 and I have blocked outgoing connections with the builtin Windows Advanced Firewall. Windows Update isn't whitelisted by the default outgoing rules list. How do I allow Windows ...
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0answers
122 views

SMB over SSH port forward

I know that since SMB is not secure, opening port 445 on firewall makes your computer vulnerable. To secure my connection, I want to run a SMB mobile app via SSH. Would I still need to open port 445 ...
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1answer
132 views

With iptables only allow certain outbound ports

Okay, I'm running a router with shibby tomato (linux based) v1.28-115 and have a bridge network setup (br1) that consists of a guest wifi. I want to only allow access to specific outbound ports... ...
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3answers
293 views

Block RDP connections except over VPN

I want to do allow 3389 port(RDP) only through VPN connection, not normally. How can I do this? I have configured VPN server in Mikrotik. I have blocked all traffic except http and https by firewall ...
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20 views

SQL Server and Windows 2008 Firewall rules

I have SQL Server Express 2008 installed on a Windows 2008 R2 box. There is a 3rd party application which needs to access SQL Server over the network. For some reason, the app is unable to do this, ...
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1answer
84 views

Will using iptables DROP target cause TCP CLOSE_WAIT that never completes?

I have some simple rules to block certain IP blocks used frequently by hackers/spammers, e.g.: iptables -A INPUT -s 173.208.250.0/24 -j DROP But, I noticed that apache hangs after a couple of days ...
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1answer
4k views

Mikrotik Firewall rule: block all connection except to VPN server

As the title says I need to block all the connection to mikrotik router from outside except connection to VPN server. Then allow Remote desktop to LAN's system over VPN(either L2TP/IPSec or PPTP) from ...
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2answers
757 views

Connect Two Computer from Behind Firewalls

The recent advent of BitTorrent Sync has made me curious as to how they accomplish a reliable, peer-to-peer connection between two internet-connected computers. Within my limited understanding and ...
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1answer
364 views

UFW: block all traffic for port 3306

How can I block all traffic for just one port? Take the following situation: Ubuntu Desktop VM Browser has access to internet (port 80 stays open) Ubuntu update services work normally (may not be ...
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1answer
243 views

iptables stupid error (iptables -A INPUT -j ACCEPT)

[root@router ~]# iptables -A INPUT -j ACCEPT iptables: No chain/target/match by that name. How is that possible? I recompiled the kernel (3.11.8) and updated iptables to 1.4.16. The strage thing is ...
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1answer
736 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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135 views

Group Policy settings for the Windows Firewall are sometimes ignored on startup

We deploy our Windows Firewall settings (among other security settings) as local policies to our machines. They are not part of a domain. There is a weekly restart configured for each machine, ...
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34 views

Windows server 2012 doesnt load webpage configured for .net framework 4.5

I am using windows server 2012 operating system as server, i have configured sample html pages with .Net 2.0 framework and 4.5 framework in iis 8.0 . The problem is the .net 2.0 configured with html ...