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

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3
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47 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
627 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
966 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. ...
2
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0answers
173 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
88 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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236 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
67 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 ...
2
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0answers
120 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 ...
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114 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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201 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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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 ...
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199 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
87 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
340 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
999 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
431 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
7 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
22 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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15 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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14 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
9 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
18 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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26 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
60 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
27 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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93 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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66 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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40 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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184 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
25 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
37 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
89 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
31 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
59 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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69 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
179 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; ...
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0answers
22 views

is it possible to use certificates on windows firewall?

Scenario: I have a situation where I work from home. I need to connect to a database server on the internet. The server has whitelist rules for IP addresses on firewall. My IP address changes ...
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0answers
75 views

Iptables: dropping/rejecting new and invalid connections

I'm very new to iptables and my goal is the block NEW and INVALID connections on the INCOMING chain and log any attempts for a NEW connection. I'm also letting any and all traffic out on the OUTGOING ...
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0answers
218 views

Why do my nat iptables rules not work with marked packets?

System: debian squeeze, Linux server 2.6.32-5-amd64 #1 SMP Tue May 13 16:34:35 UTC 2014 x86_64 GNU/Linux, iptables v1.4.8 lsmod | grep iptable iptable_security 2176 0 iptable_mangle ...
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0answers
18 views

BSD Packet Filter Redirect Internal traffic

I'm using OSX Yosemite with Packet Filter (BSD). Is there a way to redirect internal originating traffic (let's say from en1) to lo0 on a specific port for specific destinations? rdr from what I ...
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0answers
109 views

PF rule using return-rst on Mac OS X does not reply with TCP reset

I'm trying to add a simple PF rule: block return-rst out proto tcp from any to any port 33128 to filter all outgoing traffic to TCP port 33128, and I'd like it to respond with a reset. However, ...
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0answers
25 views

Sonciwall SNMP configuration

I'm playing with some old Sonciwall and i like to configure with SNMP. All doc. and google iv done are the same procedure. System > Administration > SNMP Enabled ( community string etc. ). 2-step: ...
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0answers
65 views

Can Windows Firewall be hole punched?

If you send a packet to someone's router, it will most likely be rejected by either the router firewall or the router's NAT (if no port is forwarded). However, for a short time, your router will ...
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0answers
241 views

Connect to SQL Server. Error 26 : the type initializer threw an exception: error locating server instance specified

I have a SQL Server 2014 Express installation. It is configured for Remote connections TCP is activated mixed mode Authentications are allowed and the server firewall is deactivated My program ...
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0answers
59 views

If nmap reports a port is open, does that ALSO mean a service is listening on the port?

I have a Thompson TG585v7 router/firewall whose firewall is configured to FORWARD several ports to a computer X54 within the LAN. These ports are in the range 1024 through to 2500 That X54 ...
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0answers
317 views

Open ports with iptables — still closed

I'm trying to open some ports for a gameserver, which is running on my Linux vServer (Ubuntu 14.04 LTS 64bit). The game needs the following ports: 16261 (UDP) 16262 (TCP) // Player 1 16263 (TCP) // ...
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99 views

How to configure iptables to set public IP for outgoing traffic from private IP

I have multiple public IPs at home: 1.1.1.1 (main IP) 2.2.2.2 (additional IP) In my local network, I have two computers, let's say 192.168.1.1 (PC1) 192.168.1.2 (PC2) Infront of the computers I ...