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

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Why are SSDP multicast packets blocked on m0n0wall; how to unblock them?

My firewall logs are being flooded with logs of packets being blocked that i don't want to be blocked: Every 3 seconds there are 2 packets being broadcast from my machine: Interface: LAN Source ...
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1answer
87 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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1answer
2k 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
125 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
103 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
258 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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1answer
124 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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1answer
194 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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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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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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101 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 ...
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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 ...
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1answer
244 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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1answer
273 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 ...
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1answer
25 views

How do I properly start a vnc server on fedora?

I don't remember this being difficult last time I used vnc. This is what I've tried (I'm running fedora 21)... First off, install a vnc server. sudo yum install tigervnc-server ... y Now to ...
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1answer
1k 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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1answer
38 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 ...
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1answer
52 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 ...
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1answer
66 views

Open ports in Ubuntu 13.10 server

Im setting up a realtime gameserver fps-game, and then i need to configure ports. Just to mention, i will setup multiple servers for this game on the same ip address, which means i must open multiple ...
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1answer
174 views

No Internet Connection on using Buffalo WHR-G300N

I have used the Buffalo WHR-G300N over 2 years while I will use it for connecting all of my devices to Internet @ home. However, two days ago, I have the issue that the router suddenly disconnected ...
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1answer
235 views

Game Client's Listening Server Unable To Establish A Successful TCP Connection (Updated)

Scenario, A Risk of Rain On a game called "Risk of Rain" (RoR), I am hosting my own listening server. However to my demise, it seems that nobody can successfully join my server. I have done the basic ...
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1answer
431 views

Windows Firewall inbound rules still blocks ports

I applied inbound rules for port: 1935, as well as outbound. When I check on canyouseeme.org, it says it (port 1935) times out. When I completely turn off Windows 7's firewall, it works without a ...
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1answer
660 views

Can't connect to Windows Server 2012 on Amazon EC2 through FTP over internet

I have a Windows Server 2012 on Amazon EC2, with IIS FTP set up and working (through local IP address of the machine within EC2). However I cannot connect to it over internet. In firewall I have ports ...
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1answer
307 views

Terminating OpenVPN after disconnect - how to disable reconnecting

I want my OpenVPN client application (running on A) to quit when it is unable to connect (or reconnect) to a server (B). I use the UDP protocol. Both A and B are Linux systems. More precisely, I keep ...
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1answer
22 views

i am not able to connect to the application hosted on port 80

I am trying to access an application that is hosted on port 80. When i try the url from my personal computer , the site is not reachable but the same url on the server( which hosts the application) i ...
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1answer
734 views

Yahoo Mail behind a watchgaurd

I'm getting the following error when I open a thread in the new Yahoo mail behind our watchguard firewall Response denied by WatchGuard HTTP Proxy. Reason: header 'Content-Type' denied ...
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1answer
947 views

Blocking incoming connections from IP in windows XP

I have a request to block any incoming connections from a block of IP addresses but they would like to leave the outgoing traffic alone (no block). Is there a way to do this in Windows XP? The ...
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1answer
431 views

website blocked by netgear firewall

I have a Netgear DGN10000 supplied by Virgin Media in the UK. It is running the latest firmware (V2.1.00.25_VG). For some reason it appears to be blocking all URLs which contain "microsoft.com" ...
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1answer
2k views

How to allow windows store apps and the windows strore to pass the windows firewall

I use the windows 8 firewall and I wanted it more secure, so I block incoming and outgoing connection. Unfortunately I realized that the windows store did not work as well and all application from the ...
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1answer
501 views

Need iptables commands to permit all WAN originating traffic to enter the LAN side of a router

I have three routers. Router0's WAN interface connects to the ISP, and the WAN interface of Router1 and Router2 connect to Router0's LAN interfaces (i.e. hard wired). So this is what it looks like, ...
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1answer
170 views

ssh to Amazon EC2 Ubuntu server behind firewall

I ssh to an Amazon EC2 server and have just enabled the ufw firewall. This terminated my connection and now I can't ssh back in. I assume the firewall is preventing access. I tried rebooting but no ...
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1answer
932 views

Window 8 machine cannot ping devices on same subnet

After returning from vacation during which several Windows updates were applied and my router suffered a hard power cycle, my Windows 8 Desktop can no longer ping other devices on the same subnet. ...
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196 views

Is it possible to granularly configure OSX's application level firewall?

From looking at the UI in the System Preferences App, it looks like the application firewall rules in OSX's firewall are "all or nothing" -- "Allow all" or "Block all" effectively. I'm under the ...
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1answer
43 views

Filtering downloading a file

I know there are several types of firewalls operating at different layers of OSI. ACLs(layer 3 firewalls filter based on port numbers and IP addresses), SPI(which examines the patterns of data at ...
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1answer
218 views

Log is full of “stealth mode connection attempt”s

My daily log is full of messages like: 8/25/12 8:27:01.385 PM Firewall: Stealth Mode connection attempt to UDP 192.168.1.101:40959 from 109.254.109.20:1098 where 192.168.1.101 is IP of my mac. ...
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1answer
109 views

Consumer Router/Firewall qualities which are compatible with IP phones

I use a SIP phone from home over an internet connection to connect to a PBX in the internet. The internet connection is 50 Mbps down / 10 Mpbs up. Empirically I have tested several routers and found ...
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1answer
661 views

Running Smoothwall in Virtualbox

Okay so here's my deal,I need to run Smoothwall in a VM using Virtualbox running on a host PC with two physical NICs. I have some roommates and we are all sharing one internet connection which ...
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1answer
313 views

Stopped windows firewall service during ICS, how is this possible?

Although windows firewall is required to be on when you "start" Internet Connection Sharing, you can stop the WF service with MMC. When done a client can still use the host machines internet. The ...
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1answer
1k views

Telnet-ing to alternative SMTP port: “No route to host”

At home is a Mac Lion Server running a mail server. I have a VPS thats used as relay for incoming mail, to prevent problems when my home server might go down. Because my ISP sometimes blocks port 25, ...
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1answer
82 views

Logging into Windows Live from Zune Desktop vs. web

In my company, IT has blocked the use of Windows Live Messenger client, but I am able to log in to Web Messenger just fine. When I try to sign in to the same Live ID via Zune Desktop software ...
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1answer
290 views

How to disable Wii updates through router filtering?

Since there is no way to disable Wii updates through the device itself, I was wondering if anybody knows what IP (or any other identifiable information) the Wii updates come from? I was thinking that ...
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1answer
479 views

Shorewall NAT problem

I have installed and configured Shorewall with two ISPs. I want to provide Internet access to the clients and the other connection for servers connection and NATs. I can navigate both from the ...
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1answer
60 views

Firewalls local connections

I have question about blocking local connections by desktop firewalls. Is there any trend where firewalls block local connections by default or rather they allow local connections. I want to make app ...
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1answer
199 views

Web access control for a Mac environment

Our home environment is all Mac. I wish to have more control over net access than I can manage using 10.6 or 10.5 Parental Controls. I don't want to install poor quality or unreliable software. I'm ...
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1answer
63 views

Proxy to collect Domain addresses

Our company IT is requesting a list of domain's we regularly visit to allow them through the newly installed firewall (insanely stupid, I know). Is there a Proxy server which Can sift through the ...
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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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1answer
637 views

Why is my Ares not Working?

I recently increased my blink broadband speed and now my Ares is not connecting. I spoke to the blink peeps and they deactivated my firewall..but Ares still is not working. What do i do?
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115 views

Outpost Firewall asks every time one specific application tries to access to network

One of installed applications on my PC tries to send UDP packed. Outpost warns me about this. I say that Outpost should allow all activity for this application. But next time application wants to ...
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1answer
5 views

_name (underscore prefix) vs name what's the difference of the option name for firewall configuration in OpenWRT?

I saw different writing of name option for OpenWRT firewall configuration, seems all work fine. What's the meaning of the different formats? _name option '_name' 'Don'\''t track NETBIOS Service' ...
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1answer
30 views

How do I access Jira from my LAN?

I purchased the server version of JIRA Agile and have it running on my Windows 8.1 x64 machine. I have the Catalina service in conf/server.xml file set to port 8100. I also modified the Windows ...