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

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Work firewall blocking Gmail IMAP port

My work has a very over protective firewall. We use Google Apps for our email and so can access the web interface just fine. I use my laptop at work however (MacBook connected via WiFi through my ...
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1answer
746 views

PureFTPd is using ports above 50000 even with PassivePortRange specified

I have installed the pure-ftpd package with PureFTP 1.0.24 on Ubuntu 10.04 using apt-get. Even though, this is the default port range, I've added the file /etc/pure-ftpd/conf/PassivePortRange ...
2
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1answer
273 views

Accessing a site using websocket behind University gateway

I'm trying to access lichess.org from the university network. I can access the site but when I try to join/launch a game, I keep getting reconnecting message. I emailed the admin and he told me they ...
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1answer
1k views

Blocked outgoing SMTP socket connection in Windows

I have a private email sending application (Windows), which sends email notifications over SMTP protocol. This might look like a code question for StackOverflow, but it is not. The application works ...
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1answer
4k views

How to quickly Enable/Disable Internet Traffic so that it ONLY goes to ONE program?

What Firewall program (preferably free) can I use to quickly enable/disable internet traffic so that it only goes to one program? For example, sometimes I need only one program (Program X) to be ...
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1answer
355 views

Accessing my Rails webrick behind proxy?

In my mackbook, when I try to connect to my rails application in office I can't , in the office there are some http proxy , and when I run my rails like this : sudo rails s -p8080 => Booting ...
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3answers
1k views

How to firewall a VPN connection in Windows 7?

I have a VPN connection to a private VPN server in another country. I don't want any internet packets to leave or enter my laptop unless they are going to or coming from the VPN server's IP. Is ...
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1answer
502 views

Remove Windows Firewall requirement for adding printers

Is there a way to remove the requirement Windows 7 has to have the firewall enabled to add a shared printer to the computer?
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3k views

SQL Server Ports

The Microsoft website states The firewall must be configured to permit port 1433 incoming (or the port numbers that SQL Server listens to on TCP/IP), and ports 1024 to 65535 outgoing. Does this ...
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2answers
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OpenVPN on a campus network?

I have my router at home running Tomato USB with OpenVPN running on port 1194. The campus network only has port 80 publicly open and I'm almost positive that they do traffic shaping and content ...
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3answers
6k views

iTunes Home Sharing only works one way between 2 Windows XP PC's on the same LAN

Both PC's have the latest iTunes installed. PC (A) can "see" that there is a shared library "B library" but attempts to connect to it return this error message: The shared library "{Username}'s ...
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1answer
642 views

What ports in firewall need to be open for allowing Mac Vine Server connection

I have a Mac with Vine server installed sitting inside the firewall (actually a router connect to cable model, and has a LAN to internal). What if I want to remote desktop to Vine server from ...
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1answer
691 views

Why would http & https be blocked, even in safe mode with firewall disabled?

I have a windows 7 machine (dell studio xps). Everything on it seems to be in working order. The network device says it has internet connectivity, and indeed I can ping websites, transfer files via ...
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2answers
2k views

Connecting together DIR-615 and DIR-655

On my DIR-655 my internal network is: 192.168.0.x On my DIR-615 my internal network is: 192.168.1.x They are both connected to my firewall PIX 501 box The PIX itself is connected to the comcast modem. ...
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3answers
2k views

How can I scan from Canon PIXMA MX700 without disabling OS X firewall?

I have a Canon PIXMA MX700 connected by ethernet. When I first bought it I was using OS X 10.4, and scanner-initiated scanning worked fine. After upgrading to 10.6, neither scanner-initiated or ...
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4answers
5k views

UFW as an active service on Ubuntu

Every time I restart my computer, and check the status of the UFW firewall (sudo ufw status), it is disabled, even if I then enable and restart it. I tried putting sudo ufw enable as one of the ...
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14 views

How to configure Windows Firewall to allow all ports in use by IIS Express

My understanding of this technet article, per the page that brought me there*, is that I can configure the Windows Firewall to allow all inbound traffic on any port being used by a specified ...
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0answers
79 views

What might be causing specific IPv6 HTTPS servers to send an excessive number of RST packets?

Client browsers on my IPv6-enabled home network hang and time out when attempting to load https:// URLs from specific IPv6 sites, such as ones operated by CloudFlare. In those situations, the live log ...
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1answer
72 views

IPSet with IP6Tables ERROR

Can someone please solve my headache and tell me how to fix this? [root@www ~]# ip6tables -I INPUT -m set --match-set blacklist6 src -J DROP ip6tables v1.4.7: Couldn't load match ...
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0answers
1k 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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1answer
120 views

SSH: can connect to computers on local network but cant connect remotely

I have 3 computers running ssh server on them: PC1 is running Cygwin on Windows PC2 is also running Cygwin on Windows PC3 is running Linux and they are on the same network connected to same ...
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1answer
101 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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1answer
236 views

Firewall is blocking internet traffic to OpenVPN clients

I have a virtual network setup with a Linux router/firewall connected to two private networks. An OpenVPN server in routing mode and a web server are in one of the networks. On the other are linux ...
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3answers
175 views

what is the purpose of the `unlock` command button of `gufw`?

gufw is the GUI version of Uncomplicated Firewall. What is the purpose of the unlock command button of gufw? This command button disappears once it is clicked. My configuration is Ubuntu 12.04 with ...
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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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1answer
119 views

SSH Port closed although forwarded correctly

I'm having an issue with opening my SSH port. Here are the symptoms. Within the local network I can ssh to the machine, including both locally (ssh localhost) and from alternate computers. I have ...
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3answers
1k views

Temporarily block internet connection for a program

I'm developing an application which is supposed to work in 2 modes online and offline. I need a simple and fast solution to block the internet connection for this particular application. ...
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0answers
1k views

Windows 8 firewall blocks browser downloads

I have a curious issue with the windows 8 firewall. When using chrome and internet explorer for hotmail I can't download word or pdf attachments. I also tried to download adobe reader with with ...
2
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1answer
191 views

How to simulate yourself as if you are located internally behind the trusted zone of a FW

I work in security operational center engineer in one company. We manage a lot of customer FW, proxy,..etc. An example of our daily tickets could be the user can't access some site, so we check the ...
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312 views

How can I get Apache on OSX 10.8 to serve up a directory under a user home directory?

There might be more than one problem here, but I got my Mac back from the shop after the hard drive was failing, and the new hard drive reproduced my home directory but not httpd.conf. Since I have ...
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750 views

Firewall blocks ICMP even with Allow rules, even when disbled

Sometime early October (right after update Tuesday???). My Window 7 home machine stopped responding to anything incoming. Effectively breaking iTunes, Sonos, TiVo Desktop, RDP etc. But all those ...
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1answer
5k 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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989 views

How to open a server port outside of an OpenVPN tunnel with a pf firewall on OSX (BSD)

I have a Mac mini that I use as a media server running XBMC and serves media from my NAS to my stereo and TV (which has been color calibrated with a Spyder3Express, happy). The Mac runs OSX 10.8.2 and ...
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1answer
100 views

Strange router's firewall behavior on Linux

I have router, static ip and when I start Minecraft server on Windows, anyone can connect to it, but when I start server on Linux, only players from my local network can connect. And other players can ...
2
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1answer
235 views

Prohibit internet access for all applications except selected ones (OS X)

Is there a tool that can be used to prohibit internet access for all applications except selected ones (on Mac OS X)? "Little snitch" can't be the answer, as it doesn't provide a simple "deny all / ...
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319 views

Can I get UDP Hole Punching with (any) VNC client to get around the local firewall/router?

I don't have access to the local internet router, so I'm unable to setup port forwarding on my lan connection. I'm just trying to find out if there is any way for me to get around my local router ...
2
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1answer
1k views

Cannot access local server via home router — but works from outside [duplicate]

Possible Duplicate: DD-WRT: How to allow port forwarding to apply to requests originating from inside the LAN? I have a webserver running on my private PC at home. This PC is running ...
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3answers
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Cannot connect to WEBrick on home network

I'm an Android developer and often my applications require server-side code. I typically use Ruby on Rails for the web app, and during development will run the server on my local machine (Mac OS X) ...
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None of the clients of LogMeIn Hamachi mesh-network are reachable

For some reason my Hamachi network stopped working. Here is what I have Version of the Hamachi client is 2.1.0.122 It's "Mesh" network. I have 7 clients, 3 of them are online right now. All clients ...
2
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1answer
74 views

Odd port 46253 activity getting through the firewall

I've been reviewing the log file for my personal router/firewall WGR614v9 and, though I have 8 active hosts on the network, I keep seeing connections to port 46253 to one of the Windows7 hosts at ...
2
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1answer
240 views

Configuring a Power Mac as a Gateway

I have a Mac OS X Leapord Server v10.6.8 installed on an Xserve and currently have things set up in the following order: ISP --> Router --> Switch --> Server --> iMac. I also have a ...
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0answers
717 views

How do you add a MAC-based routing whitelist with DD-WRT and the OpenVPN client?

I have an OpenVPN client set up on my DD-WRT home router which maintains a VPN into my workplace. Slight problem: I don't want random lusers who access my wireless AP to have access to my company's ...
2
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2answers
936 views

Using iptables to selectively route outgoing requests?

I'd like to set up my Dd-WRT firewall so that it uses the VPN service from a VPN provider to access a bunch of destinations and normal route foe all other requests. In detail: giganews.com would be ...
2
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1answer
269 views

Is there any way to set up a malware-blocking transparent proxy on an Airport Extreme?

I'd like to add some kind of easily-administered transparent HTTP proxy to my home network. Ideally, it would allow me to, for example, redirect web requests to blacklisted servers into nothing, block ...
2
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4answers
457 views

Block all but http traffic on a network interface

I've got two network interfaces on an Ubuntu machine which go out to two different networks but both have internet gateways. I need to limit it so that any outgoing http requests it makes (ie ...
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1answer
481 views

Unable to connect to MSN network with Adium

I'm new to the Mac world and tried both MSN Messenger for Mac (7.0 and 8.0 beta) as well as Adium to connect to the Windows network. I've enable 'Allow all incoming connections' in the Firewall ...
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2answers
886 views

Any hopster like free application on mac to bypass firewall?

On windows, hopster can be used to bypass firewall , then can use msn , or gtalk freely. But on mac, what is the similar application and it is free ?
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2answers
393 views

Openvpn suddenly stopped working on some laptops in my college

My College: The LNM Institute of Information Technology What our tech department uses: Cyberaom Firewall for userid authentication What we found out 3 months back: OpenVPN was our solution to ...
2
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1answer
2k views

How to allow Dropbox to auto-update by adding an exception to ESET firewall?

I am using ESET Smart Security v5.2.9.1 and Dropbox at Windows 7 x64. The problem that I am facing is that every time Dropbox wants to auto-update, it downloads an updater file that has different ...
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10answers
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Corporate firewall blocking localhost/127.0.0.1

Is there some way I can access this without having it go through the corporate firewall at work? I'd like to set up a quick little production (WAMP) environment before moving things to the final ...