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

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1answer
17 views

nslookup DNS Request Timed Out

I can't check the DNS, cause I use firewall in my server. How to fix it?, I have a server. DNS Request Timed Out
0
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0answers
9 views

how to scan in ubuntu in inside of firewall to check which ports are blocked by ASA or Juniper

how to scan in ubuntu in inside of firewall to check which ports are blocked by hardware firewall such as ASA or Juniper or switch's access list ? if can not install any software but can upload a ...
-1
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1answer
37 views

Problems during small office network design (multiple switches / load balancers / print servers)

As part of my HND in system design , I'm supposed to come up with a design for a small busness network where there are 200 student pc's (in 4 labs) + 10 academic staff pc's + 1 Server (Active ...
1
vote
1answer
17 views

Connecting a port in linux from other machine

I'm going fast to asking this question so i'm apologize. I'm on Linux Fedora 23. I'm running an application Telegram-CLI with listening a port using this argument. -P 1337 That is fine and works ...
1
vote
1answer
56 views

Blocking Windows 10 Telemetry Causes Watermark?

So I have been using the firewall from Symantec Endpoint Protection to analyze and block telemetry collected my Microsoft. I have recognized a trend. The standard feedback client tries to connect ...
1
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0answers
11 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 ...
1
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2answers
27 views

Scan outgoing traffic for sensitive data

I run Windows on my desktop, but I would be willing to route my traffic through a Linux box if required. I've had two instances of my credit card being misused in two months now. Despite being ...
1
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0answers
27 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 ...
0
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0answers
11 views

Refit old CISCO 5505 ASA hardware with Linux/FreeBSD software - (for the experience)

I was given an old Cisco 5505 ASA (EOL). The device hardware meets the specs for what could work in a small network, and I would like to replace the Cisco IOS with a unix open source option, like ...
1
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1answer
35 views

Configure Windows Firewall to block ALL applications system-wide, except for a select few?

I'd like to make it so Windows disregards internet access for every system and user application, and let me add exceptions as I see fit, but I'm having problems... Going to "Windows Firewall with ...
0
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0answers
4 views

Can I block some web pages only on specific user accounts on my Windows computer or do I need to purchase a firewall to do that?

I have an administrator account and I have 2 other accounts for my dad and my brother. How can I block those 2 accounts from accessing certain websites but keep allowing my account unrestricted ...
0
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0answers
12 views

Port forwarding in pfSense not working

I recently set up a pfSense router and can't get any port forwarding to work from outside my own LAN. I have the following forwarding rule to a local server located at 10.0.1.2: Note that if I ...
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0answers
21 views

I can't open a single port

I can't open ports on my computer. What I have tried: DMZ my computer on router, set static IP, used nMap to see if ports were closed, asked ISP if they block ports, turned off and let programs ...
0
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0answers
25 views

Cisco ASA 5505 port forwarding - rules breaking internet

I'm working with a client, they have an old outdated ASA. They have an app that requires ports 3000-4000 be open, and ICMP allowed. The computer hosting the app is at 192.168.1.167 Everything I try ...
1
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0answers
17 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
26 views

Firewall service doesn't start after reboot

Every Sunday morning, our VDI's with W7 32 bit and VMware view 5.1 get a scheduled reboot. About 5% of them are not reachable after the reboot. It turns out the Firewall service hasn't started. When ...
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0answers
12 views

Simple interactive windows firewall [migrated]

I'm surprised I cannot find any windows application fulfilling following requirements: to behave as standard, simple, standalone and interactive windows firewall, nothing more not to be unmanageable ...
0
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1answer
28 views

How can I allow traffic to certain web address but restrict all other in linux

I want my linux (ubuntu 14.04 , 64 bit) system device which has a 3g card in it to have restricted access of internet . I want to build a scenario where if the card is active, the system should be ...
0
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2answers
61 views

How can a WiFi router recognize MAC address change of a connected device?

My teen son and I are playing a hacking game. I've installed an WiFi router with parental controls, MAC filtering, VPN, etc. I block Internet for him, he tries to break out of the cage (for now I'm ...
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0answers
15 views

Iptable entry gets vanished in an hour in oracle linux 6

I carried out the following steps to create a port-forwarding rule: sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 443 -j DNAT --to $ipaddress:10443 sudo iptables -A FORWARD -p tcp -d ...
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0answers
14 views

Accessing a shared folder via IP address

I have a VM (in Azure) with a static IP address. I also have a shared folder there - \MACHINENAME\Folder I want to access this folder from another machine over the internet - \ip.address\Folder I'd ...
0
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0answers
22 views

How to know that I passed the firewall from the TCP connections?

In my company, in order to access some intranet-sites, I have first to login to webpage (which I suppose is a firewall or something) with my account. If I login from FF for example, I can access the ...
0
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2answers
54 views

How can i block users from streaming facebook videos

I have a Draytek vigor 2925VNPlus and I have been able to block users on my WiFi from going to YouTube. However I don't want to block Facebook as a whole I just want to be able to block the videos so ...
0
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0answers
13 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 ...
0
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0answers
27 views

pfSENSE: Can't ping dmz gateway from inside dmz

I currently have a virtual pfSense machine with 3 interfaces (WAN: 172.16.xx, LAN 10.1.0.x, OPT1(DMZ) 10.1.1.x) I currently have no explicit rules, besides allow any to any on all interfaces. Internet ...
0
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0answers
21 views

Virtualbox: Unable to SSH to guest from non-local network

I have virtual Ubuntu server hosted by Virtualbox. The virtual machine is using bridged interface. (The VM must have spesific IP so I use bridged interface.) The virtual machine is on network ...
0
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0answers
20 views

Am I bridging this correctly?

So first of all I'm going to give the configuration I currently have, which is somewhat working The only difference between this image and my actual setup is that I have a router instead of a switch, ...
1
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0answers
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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votes
1answer
27 views

how to block access to all ports except certain ones in Windows? Settings locked down by admins [closed]

I want to block all ports on my computer except ones used by applications that I use, blacklisting anything else. Firewall settings are locked down and I need access to a portable application. Minimal ...
0
votes
1answer
43 views

Debian : Outgoing port-scans detected, what to do?

We recently received a notice from our Server-providers that they detected an outgoing port-scan from our Server. They checked for malware or compromised account, but didn't find any. All they have ...
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votes
1answer
38 views

None of my servers are working on Fedora Server 23

I currently am trying to use a Dell PowerEdge server with Fedora 23 Server as a minecraft server and a web server. For a while, my friend was using it to host his minecraft server on port 25565, and ...
0
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0answers
27 views

Best way of testing client/server applications as if two different sites

I've been doing a few projects recently testing client/server setups on my LAN. I have a regular ADSL connection at home with my own internal LAN. For example I've setup OpenVPN and tested via my ...
0
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0answers
13 views

How to allow guest on network in squid (ipfire addon)

After installing IP-Fire And being able to join a domain I have the following questions. How can I handle guests? They should have the limitations as normal users, but I don't want to add the proxy ...
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0answers
25 views

Firewall can not be turned back on

It says to use the recommended settings for the firewall but it loads and then does nothing. I went to "Services" and double clicked "Windows Firewall" it says it is stopped so I tried to click start ...
0
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0answers
10 views

Port Forwarding with out access to firewall

As the title says (and additional information) I am in a rural local with a ISP that not a direct line to the internet (I think they are piggy backing off another XD) or to the router in-between, so ...
3
votes
1answer
53 views

UDP “connections” rejection

I'm managing (edit: is hosted by VPS hoster) small machine for couple of game servers and website server (apache) together with some friends. Problem is firewall sometimes drops UDP packets. The ...
1
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0answers
10 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 ...
0
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0answers
13 views

Not able to access IP CAM on different wireless AP

I've set up a small home network with 1 wired router (TP-LINK TL-R860) and 2 wireless routers (TL-WR841N). Everything seems to be working correctly except for one issue... I have a wireless IP cam ...
19
votes
1answer
1k views

Is it possible to create firewall that only allows legitimate webserver traffic on port 443 and not any other service?

I always used the simple trick to bypass most firewalls which prevented me from using any ports. I simply opened ssh on one of my servers on port 443 and tunneled all traffic through there. However I ...
0
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0answers
18 views

monitoring DD-WRT router logs with WallWatcher

I was setting up log monitoring for my DD-WRT router with Wall Watcher. What I have problems with is the actual logging. I've found that the router's syslog port is 514, however when I allow this in ...
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0answers
19 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 ...
0
votes
1answer
26 views

How to block certain IP addresses on UEFI system?

So I have several OS on my PC and I'm frequently changing this. Is there some way I can block certain IP address on my NIC so that I can't access it no-matter what. I'm thinking maybe if there could ...
0
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0answers
49 views

Port Forwarding on CentOS 7 using FirewallD

I have a network where I have a Netgear cable modem bridged to a VyOS Router, then a DMZ network to my external firewall / internal gateway then into my local network. (I have the Netgear modem ...
1
vote
1answer
28 views

Comodo Firewall asks to restart the computer. How to refuse?

Comodo Firewall asks me to restart the computer. In the dialog box it seems that I can only postpone the reminder. Is there any way to turn off the reminder for ever? I use Comodo Firewall with ...
3
votes
1answer
121 views

How to isolate networks with a Mikrotik router?

I have recently got a Mikrotik router for my network, and I want to create 3 networks that are isolated from each other but all have internet access: The "main" network for PCs, etc. A network for ...
2
votes
3answers
70 views

Cannot Access My Computer Over LAN

I cannot even ping my computer from another device inside LAN. I've tried the followings: Turned on Network Discovery, File&Printer Sharing, Folder Sharing from Network and Sharing Center ...
0
votes
1answer
33 views

How to Block all inbound and outbound traffic to and from an Local IP

I need to block entire traffic to and from an Local IP on an WiFi Network, I am using DD WRT Based router, So I Can use iptables. I know the IP Of an Client on the Local Network, Some thing like ...
0
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0answers
25 views

Dropping a connection upon a certain event

Is it possible to drop connections to a number of remote stations when another is open? For example say we have a set of machines with the network addresses (IPs) {A, B, C} and another with the ...
0
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0answers
69 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 ...
0
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0answers
85 views

Blocking Samsung TV firmware updates using Zyxel's 'Eircom f1000' VMG8324-B10A

Please note to fix Wi-Fi in the past, using a guide created by users of this forum, I have previously unbranded this router to remove the Eircom firmware and it now runs V100AAKL12C0 which was ...