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

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23 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 ...
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2answers
31 views

Why does blocking DNS traffic to 192.168.. cause a “limited” connection with the router?

I am trying to close all unnecessary ports/addresses with my firewall. If I block traffic from 192.168.. to 192.168.. destination port 53 I get a "limited" connected with my DSL router. If I ...
1
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1answer
36 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 ...
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0answers
25 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 ...
1
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1answer
24 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 ...
0
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0answers
12 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 ...
1
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1answer
22 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 ...
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0answers
3 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
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0answers
7 views

Restrict Hamachi Gateway Scope / Ports

A client wants to make a couple of websites intranet-only, but still allow access at about 30 outside locations. Hamachi gateway would work nicely for this, but I do not want those computers to have ...
0
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3answers
28 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 ...
1
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1answer
12 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
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2answers
17 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
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0answers
7 views

Analyze network requirements are met in a router's port [closed]

My company deploys a tiny piece of hardware (technically a router) to our customers venues. That hardware is plugged into our customer's switches/routers through an Ethernet port. Our customers are ...
0
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0answers
23 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 ...
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0answers
21 views

how to allow single port and block other ports in firewall

"how to allow single port and block other ports in firewall"? Do u have solution for my problem ? I also done by blocking all ports and cant establish to allow single port
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0answers
12 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?
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0answers
13 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 ...
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3answers
35 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 ...
6
votes
3answers
161 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
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1answer
25 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 ...
0
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0answers
10 views

Block all outgoing ports from iptables.

I have a windows xp machine running specific application which can be access by single port (27500). there is nothing else i want to access on this machine. If i block all outgoing ports from this ...
0
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0answers
18 views

Connect to VM to VPN through another VPN

My current setup is: My work desktop connects to our corporate VPN. I have a VM (Linux Mint) in VirtualBox that I am attempting to connect to another VPN (Private Internet Access). The VM in ...
0
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1answer
33 views

Portforwarding fails

I know how to portforward and I did it on at least 5 different routers at different places. But at home, it does NOT work. I can't figure out why. I tried different routers, even routers that I ...
0
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1answer
26 views

Can I backup and restore firewall settings on win 8.1?

Can I backup and restore the firewall whitelist on windows 8.1, independently of any other system settings??
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1answer
16 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 ...
0
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0answers
14 views

Initiate connection and host services through firewall / nat

I have really great connectivity (1 Gbps internet connection) and a really good base to run a server. Almost every station in my office has its IP address public. I don't know why, but it was made ...
1
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2answers
41 views

Torrent ports and firewalls

I use this uTorrent program, under its settings 'Listening port' I set up a port of 46301, and also open that port in firewall. But whoever connects to me to leech, they connect to random ports ...
0
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0answers
18 views

tunnel all traffic of a p2p/DHT app through proxy to an external server

I am playing with http://telehash.org/ a protocol using DHT distributed hash tables, all its traffic is sent on a certain port (42424). And I want to do this while in my workplace where a ...
0
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0answers
37 views

Blocking Incoming IP With Win 7 Firewall

This question was asked before, but the answer is not working for me and the rules of this forum say do not respond to answers, so I am asking again. I went through the following process on the Win 7 ...
0
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1answer
20 views

CentOS - ipTables

I have some questions about ipTables. Is it possible to open all ports between 2000 and 6000 and then have 2245, 5435,5434 closed? Is it possible to open some ports from a ip address? Eg. The only ...
0
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2answers
38 views

How to enable Remote Assistance and add an exception for it in Windows Firewall from the command line?

I need to enable Remote Assistance from the command line. The equivalent of checking this box and hitting Apply. This is for automation and I tried editing the registry entry ...
2
votes
0answers
42 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 ...
0
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1answer
59 views

Comodo Firewall blocks Cisco Anyconnect VPN

I am running Comodo Internet Security Firewall (6.3) and trying to connect to work using Cisco AnyConnect VPN client. I can make the connection but can't do anything else, not even ping by IP ...
0
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0answers
34 views

How to correctly configure iptables on a laptop?

I have run these commands (tried switching the order too) because I want to set up a firewall on my laptop so that nobody can connect to it (except of course in response to a connection I've made): ...
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1answer
45 views

FTP not accessible outside of LAN

Ok so I really need some help with this, I have XAMPP installed and am hosting a webiste with it for my friends and i to work on. I am able to see the site just fine and also i am able to get to ...
0
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0answers
23 views

How to force Remote Desktop via firewall rules to use LAN instead of WLAN?

WLAN has higher priorities than LAN but Remote Desktop seems to still use WLAN. I tried to achieve this by setting up a firewall rule but this does not seem to do the trick. Here is what I tried: ...
0
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0answers
21 views

Why can I not block certain applications on Windows 7 Firewall?

The situation is this. I open firewall.cpl in the start menu and I'm trying to block a specific application from accessing the Internet (one which wasn't present on the list, I might add--so I added ...
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0answers
17 views

port forwarding in windows

I need to forward all incoming traffic on specific port to another port on the same device "locally not proxy", and all outgoing port traffic. in Linux it is possible using iptables I used NAT chains ...
0
votes
1answer
80 views

Can a people DDOS a block Port?

The title says it all, I've search around the net but no avail. From what I understand, DDoS is a distributed denial of service attack, where multiple people sent a huge request at a same time which ...
0
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0answers
43 views

Windows firewall blocks internet connection for application from network share

this is my setup: Windows 7 home premium Windows firewall with inbound and outbound traffic blocked by default, file and printer sharing and some basic Windows services allowed Tinywall to control ...
0
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1answer
46 views

Windows firewall - block all incoming connections enable/disable - CREATE SCRIPT

Is it possible to create script which enable/disable the first checkbox of windows 7 firewall settings (Block all incoming connections....)?
1
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1answer
35 views

Permanently add a firewall exception on Windows 7

I'm using Windows 7 32-bits and on every start-up, a Windows security alert popup is displayed and I need to authorize the programs to access the network. If I accept the popup, the program can ...
0
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0answers
14 views

Programming the firewall on a Siemens router

I have a Siemens ADSL SL2-141 router. From the web interface, I can program the firewall (e.g. block/unblock IP addresses). I want to do the same programmatically via telnet. But, when I ask for ...
2
votes
1answer
42 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 ...
0
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1answer
52 views

Opening a port on CentOS server not working externally?

I am trying to to setup a Ghost blog instance on port 80 of my CentOS 6 virtual server. There are no pre-installed web servers occupying port 80. If I run Ghost in production mode as a background ...
1
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0answers
25 views

Is it possible to restrict access to certain URLs for individual programs?

I have a certain use case where I want to whitelist a list of URLs that a certain application can access. In other words, I want to sandbox it, but don't have access to blocking or white listing those ...
1
vote
1answer
49 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 ...
1
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1answer
48 views

Iptables rules to only whitelist SIP providers

I have an Asterisk box sitting behind an ADSL router/modem. There are no other services on the Asterisk box, just telephony. I am getting a lot of traffic which I think are SIP probes. I've ...
0
votes
1answer
21 views

Firewall policies

I have a Juniper 5GT firewall that I use for my home server, On my home server I have an SSH server running, I am trying to access the SSH from the untrust side of the firewall, from what I believe ...
0
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1answer
10 views

Restricted logins + almost all ports closed : secure?

Context : I plan to travel. I want to make a little cloud with my personal server. I wish I could d/l some of my files and eventually upload some files which will not be executed and the whole is ...