Software that controls what connections can be made to and from a network.

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1k views

Almost all sites won't load in Windows 10

Recently my Internet has been acting badly. Basically, I can only load certain sites. Some sites work great, and others don’t load at all. I think this is because some firewall or antivirus thing. ...
3
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0answers
51 views

Configure firewalld to distinguish home and public ethernet connection

I connect my notebook via ethernet at home and outside. I want to open some ports for services like samba only at home and not somewhere else. How can i let firewalld automatically detect where i am, ...
3
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0answers
651 views

Remote desktop on custom ports

We have an office with a Windows 2003 SBS server and a couple of workstations. I set up Microsoft remote desktop for each of the computer in such a way that anyone could remote into the computers ...
2
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0answers
237 views

How to block a port from all traffic on all interfaces in Mac OS X 10.10.5 (Yosemite)

I need to block port 27017 to do some testing but I can’t seem to figure out how to do it in Mac OS X 10.10.5 (Yosemite). I know that sometime ago they moved from iptables to pf tables, but the ...
2
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0answers
127 views

McAfee firewall blocks localhost in subprocess only

This is a programming-related question but seemed more appropriate for SuperUser than StackOverflow. I have installed McAfee (a trial version of LiveSafe -- Internet Security) on my PC. I am running ...
2
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0answers
285 views

Can I set up Windows 7 VPN so that only sites blocked in China are routed through VPN?

I'm in China behind the Great Firewall using a VPN service provided by a friend so didn't get blocked in the VPN crackdown in January 2015. Since VPN can slow down traffic a lot I'd like to only ...
2
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0answers
90 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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0answers
136 views

Why is the Windows firewall not blocking outbound ports?

I use the following rule to block all outbound communications to remote 80 ports. I want to use this approach to prevent web requests initiated from this computer. But it seems I still can access web ...
2
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0answers
136 views

How to make my local tomcat server accessible to www?

So I have my "Hello World" Java project, using Intellij Idea, tomcat 7 is running. OS Windows 7. When I go to http://localhost:8080/ from my PC, it works fine. Now, I want the world to see my ...
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221 views

How to use new keyword dummynet-anchor in pf.conf of Mac OS X

Mac OS X introduced a new keyword “dummynet-anchor” in pf.conf file, which not used in FreeBSD and OpenBSD. The ipfw was removed in Mac OS X 10.10, How to use “dummynet-anchor”? UPDATE: What portion ...
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0answers
34 views

Change the insecure default to restricting scope to LAN, for adding exceptions to the windows 7 firewall?

My network is generally set to Home or Work, i'm not commenting here on Public. I understand that with Home or Work, the Private firewall profile is used. I have noticed that with the Windows 7 ...
2
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0answers
213 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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0answers
88 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 ...
2
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0answers
2k 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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0answers
348 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 ...
2
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0answers
1k 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 ...
2
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0answers
1k 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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0answers
456 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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0answers
1k views

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 ...
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0answers
16 views

Two Sites, One Firewall, Two wireless bridge, One ADSL modem,Internet Sharing

I have two physically separate sites, Site A and Site B. Site A - connected two Side B via a Wireless Bridge Site A - Transparent Wireless bridge terminates into the switch of Site A Site A - Has a ...
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0answers
16 views

OpenVPN fails on different port

I have an OpenVPN setup with a linux server and windows client in mode-server with tap and over UDP. Everything works with port 1194. But I want to change to port 500. On my firewall I forward port ...
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0answers
54 views

Block Windows 10 P2P updates with a corporate firewall

I work for a small IT company that fix mostly Windows computers, and lately we have an huge issue with Windows 10 updates. When a new computer enters our network and starts downloading updates, it ...
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0answers
18 views

Block all inbound traffic except one IP using windows firewall rules

I have no problem doing this in linux. I just write an iptable to block all traffic and another one after to allow a specific IP. However it doesn't look to be that easy on Windows. I did the exact ...
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0answers
16 views

Route traffic from ASA to different firewall default gateway

I should probably start by explaining the topography, we have two different internet connection with separate firewalls.One is an asa and one is a meraki, the default gateway for all the servers ...
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0answers
35 views

How to filter mac address

There is a main Cyberoam router. This router is used to supply network to four different areas. Each area has its own Cisco router. The Users connect through that Cisco router. Now I want to prevent ...
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0answers
27 views

Block Windows Service Access to Remote SQL Server with Firewall

So I've got a fun firewall question. We have a windows service that we have running on a Windows Server 2012 instance. It is connecting to a remote SQL Server that we do not own, among other things. ...
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0answers
45 views

Features blocked when Skype for Business web app plug-in not allowed through firewall

If a user attempts to join an Office 365 Skype for Business web conference and they don't have the native client installed (inc. the older Lync client), they have the option to install the Skype for ...
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0answers
46 views

Windows Firewall will not start up

The only backstory I have is that, prior to me noticing that firewall had stopped working, I moved a ton of things (namely Program Files & x86 and ProgramData) from my C drive to my D drive. I ...
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0answers
79 views

Why does my firewall block outgoing TCP/UDP port 137 ~ 139 + 53 ~ undefined

I've got a Draytek Vigor 2930 router which has a default xNetBios -> DNS which blocks "TCP/UDP, Port: from 137~139 to 53~undefined". What is this rule, and what is its purpose?
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0answers
33 views

How to configure Windows 7 firewall outbound rules for symlinked applications?

I'm using Windows 7 Ultimate. I have set the built in firewall in outbound white list mode (block unless allowed by a rule). Now I'm trying to configure some outbound rules for the built in ...
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0answers
20 views

Access another network computer, after remoting into this one from outside?

I have a Jenkins instance running on machine-A. On machine-B, I can go type the IP:port of machine-A into my browser, and access it just fine. Machines A & B share a local network, behind a ...
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0answers
17 views

NTP not getting through even to DMZ

My home router seems to be blocking UDP 123. sudo ntpdate -u time.apple.com works as expected, but sudo ntpdate time.apple.com I get: "no server suitable for synchronization found" I can get a ...
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0answers
44 views

Watchguard firewall with DHCP

I have a watchguard with the ip address of 192.168.1.254/24 (DHCP disabled) and all the user will get IP from Window 2008 DHCP Server [192.168.1.2 to 192.168.1.250] /24. Now I need to increase network ...
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0answers
198 views

pf error - “No ALTQ support in the kernel”… What does this mean?

I am running Mac OS X. I would like to be able to configure pf because it seems to be more sophisticated and flexible than the default Mac OS X firewall that you can access through the System ...
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0answers
126 views

Virtual server on Arris Modem: “Table FWVirtSrvTable Full”

I have forwarded ports in the past. Never had any issues. I'm using an Arris TG1672G modem. Whenever I try to add a virtual server (aka forward a port), I get this "Table FWVirtSrvTable Full" error. ...
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0answers
119 views

How to create firewall rule on virtualbox windows host to control linux guest access to internet?

I have a windows 7 64-bit host (all outbound connections generally blocked) and run virtualbox (5.0.1) with an opensuse 13.2 guest and need to create a firewall rule on the host to allow access from ...
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0answers
35 views

Configure tomato firewall in VM or Debian / CentOs server

I want to use tomato as my internal firewall for accept/block network packets inside my server system. I know that tomato provides firmware for some routers but I want to do some tricky but don't know ...
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0answers
91 views

How to config Mac OS X firewall to let http (80) request in?

I hava installed xampp in my Mac OS X 10.11 (El Capitan). It works fine when I type http://192.168.0.63 (my IP address) into my browser, but others in the same network can't access through ...
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0answers
31 views

Problems with opening ports on Linux

Basically I have tried every tutorial I could find but I can't seem to open a port in a Linux VM. I tried downloading gufw and opening a port there; didn't work. I disabled gufw; didn't work Set a ...
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0answers
142 views

tomatousb - Allow only specific IP to connect to other IP port

I'm using tomato shibby on a router, and I'm trying to set some specific rules using iptables to set the following: I have a server, which runs on 192.168.1.2 (LAN) port 2232. Everybody from the LAN ...
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0answers
86 views

Complete masquerading NAT example using nftables on Linux?

I'm looking for a complete example how to do this using nftables. It should be a DHCP client on the upstream interface, have a 192.168.0.0/24 LAN on the other interface, and also act as a firewall. ...
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0answers
51 views

iptables SNAT target and TCP ACK packets

I need to establish a TCP connection where the client is spoofing its IP for all outgoing traffic. My first attempt was to add a rule to the POSTROUTING chain like so: iptables -t nat -A POSTROUTING ...
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0answers
215 views

OS X DNS queries failing with a custom tun interface

I have a slightly modified version of tun/tap for OS X 10.10.5 running. The interface is brought up by a small python script which reads from /dev/tun and then forwards all requests over an adhoc ...
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0answers
28 views

How is Windows ICS service different from Linux-based NAT & routing when I want to hide my LAN structure from ISP?

Background I've been using a WIFI-router as my home gateway perfectly until my ISP appears to restrain the number of connected devices. And currently there is not any realistic upgrade plan from the ...
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0answers
43 views

Unable to control Windows Firewall

I have no other firewall software installed. Had Panda but removed it when I saw this happen. In the Windows Firewall applet, I'm unable to do anything. Unable to turn on/off. The "Use recommended ...
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0answers
134 views

Can I track the CPU load that IPTABLES firewall is causing?

Since IPTABLES is a software based firewall, I am wondering if it is possible to log the exact load it is causing, cpu cycles, etc. On a small system I am sure it is trivial. But how about with ...
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0answers
33 views

NAT configuration for HTTP server

There is a router (192.168.1.1) having static public IP(hypothetically- 8.8.8.8). This router is programmed to forward all incoming port 80 (TCP/UDP) connections to a particular IP (192.168.1.105). ...
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0answers
68 views

What is changing my Windows Firewall rules?

I have pretty much explicitly blocked everything in my Windows 8.1 outgoing Windows firewall rules, but the following rules are always enabled again after I restart: ICMPv4-Out, ICMPv6-Out, ...
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0answers
84 views

Ports open in router settings, Firewall disabled, no DMZ's, port's still appear as closed, why?

So I'm currently attempting to host an IIS and opened the nessesary ports, I can connect to it via localhost and on other machines in the network, however when attempting to connect to it over WAN I ...
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0answers
217 views

502 bad gateway after putting up firewall nginx

My server was working, then I added a firewall for a bunch of ports! And now I get the error: 502 Bad Gateway nginx/1.4.6 (Ubuntu) Nginx server { listen 80; server_name 45.79.80.140; ...