A Firewall is an application or hardware device used to inspect and filter network traffic.

learn more… | top users | synonyms

0
votes
0answers
388 views

Enabling the Internet Connection on an EC2 Windows Server 2012 Machine

I've disabled the firewall: netsh firewall set opmode disable I've made sure to accept all inbound and all outbound connections: Is there anything that I should be installing or adding on to the ...
0
votes
0answers
177 views

windows firewall , some ports not listening

I've added an inbound connection rule for my windows 8 firewall on windows server 2012: I've restarted the Windows Firewall. When I check that port using this program, it says that it is not ...
0
votes
0answers
100 views

Remove mapping drives from RDP to user from exteral network

I would like to know if you guys have a solution to my problem. I have a terminal server 2012 that can be accessed remotely after a VPN connection and from the LAN. My question is how can I create a ...
0
votes
0answers
271 views

Dynamic IP Blocking on FORTIGATE 200A Firewall

I have FORTIGATE 200A firewall protecting a IIS Server running a ASP.NET website (windows server 2008 and IIS7) I'm not familiar with Fortigate configurations and options. I recently had "attacks" ...
0
votes
0answers
68 views

Trace IP traffic to physical machine under Linux

In my firewall logs I recently see frequent connection attempts from a 10.0.0.0/8 network. This network is used by VirtualBox, but I can exclude that these packets come from those. No physical machine ...
0
votes
0answers
107 views

Cisco 877 configuration with multiple firewalls behind in parallel using public IP's

I would like to ask how I can configure my cisco 877 adsl router to have multiple firewalls installed in parallel behind the cisco 877 router. I have enclosed a diagram of what I am trying to achieve. ...
0
votes
0answers
253 views

Why need DHCP Relay (Watchguard) inside the Trusted network?

I run a small network that looks like this: { Win 2008 server , desktops , Wifi AP} -> Switch -> Watchguard XTM21 firewall (the Switch is connected to the XTM's Trusted interface ; the XTM ...
0
votes
0answers
54 views

UDP multicast stream on win server 2k8 R2

so i have 3 mega PCs with win 2k8 installed on them having: 1st) 1 internal NIC and 1 external 2nd) 2 internal NIC and 2 external 3rd) 2 internal NIC and 4 external same stream put on any NIC on 1st ...
0
votes
0answers
30 views

Fail over in Lokiwall Firewall

I have configured lokiwall firewall on my linux machine having multiple interfaces. Dual Routing works fine. However, I wanted to know how does the fail over happen in case a link goes down. Do the ...
0
votes
0answers
233 views

Force all traffic from one user through an OpenVPN tunnel on Debian 6 with iptables and ip route

I’m trying to force all traffic of one user through an OpenVPN tunnel. It is giving me grey hairs. The current situation is that I can either allow all traffic for this particular user, and it will go ...
0
votes
0answers
113 views

Intermittent SSH problems with a specific server from a specific Wifi router

I've been ssh'ing into a specific server from my home office via Wifi and Time Warner Cable internet for years with no problem. In recent months, I started having problems, where I'd be unable to ...
0
votes
0answers
39 views

Using a Barracuda F400 Firewall Router Without a Modem

I'm looking into a problem where VoIP phones don't ring for some of the incoming calls that I believe might be due to the network configuration. Do you need a modem if you are using a Barracuda F400 ...
0
votes
0answers
54 views

Publishing Multiple SSL Connections via TMG

I am using a Microsoft TMG 2010 as my Firewall. It is configured in a Three-legged approach, with public facing servers in DMZ. There are two public servers. Once is a Citrix Access Gateway which ...
0
votes
0answers
67 views

nslookup gives timeout based on request - what gives?

I have the following strange problem with the DNS lookups in our Windows domain (dns service runs on the domain controller): from machine 'A': dns request for machines in the same network zone ...
0
votes
0answers
88 views

How can I log and maybe even block IPs that send lots of incoming UDP traffic?

we run a voice / teamspeak server which receives legitmate traffic on port 9987 from many ips. Sometimes we get DDoSed. So people use single Servers and send 1-3 Gbits of UDP Floods to that port. This ...
0
votes
0answers
20 views

Sonicwall 250m bandwidth

We have an nsa 250m with the SonicOS Enhanced 5.9.0.2-107o version. Is there a way to manage bandwidth by group ? I'm already able to do this this by user with this method Firewalls => Access rules ...
0
votes
0answers
31 views

netsh advfirewall : how to force to prompt matched IP

I have a netsh script that inserts some IP's to block in the Microsoft firewall. All these rules are working perfectly. I would like to create an additional rule to have a popup / prompt from the ...
0
votes
0answers
79 views

Is the IP based filtering in Amazon EC2 enough to ensure security?

I am hosting a webserver using Amazon EC2 and want it to be accessible only from a particular IP. I have set up my security groups to allow connections from only that IP. ...
0
votes
0answers
138 views

Setting up a firewall to route between interfaces on a gateway

I've been trying to setup a firewall on my debian gateway with iptables. The gateway is connected to a a network 12.120.0.0/24 on eth0 behind a NAT and the subnetwork behind it is 12.120.4.0/24 eth1. ...
0
votes
0answers
171 views

Cisco ASA 5525 and multiple internet interfaces

I'm replacing a firewall this weekend with a pair of ASA 5525's. The network configuration is as follows :- Inside LAN - 192.168.1.x Internet 1 - 62.0.0.x Internet 2 - 52.0.0.x The currently ...
0
votes
0answers
63 views

Filtered port 22 with no firewall settings

I'm trying to connect to an sftp server from a CentOS 5.5 server. The connection is never established. When I run the command: nmap -p 22 -P0 <sftp server address> PORT STATE SERVICE ...
0
votes
0answers
115 views

Overactive SQL Injection Attack Firewall Rules

We have a web app that our client's employees use to submit signatures from customers using HTML5 canvas to create PNG images. The signature pad is converted to base64 encoded HTTP POST data. Our ...
0
votes
0answers
96 views

dynamic IP firewall configuration for public-yum.oracle.com and clam AV

I currently have Clam AV installed as the AV solution for an Oracle Linux environment. The firewall that I use allow filtering only through specific IPs and thus currently, I am not able to configure ...
0
votes
0answers
206 views

How can I allow NAT from inside to outside and vise-versa when each of my clients will have only one static public IP using an ASA5525-X?

My network topology is pretty basic. My data center provides a router and added a switch just before my cage to provide connectivity to all of the racks. My rack takes the copper drop they provide and ...
0
votes
0answers
58 views

Watchguard XTM 23 blocking company website

The company that I'm working at runs a website and 1 week ago the site started returning 404's whenever anyone tried to access it from our protected network. We immediately checked on the status with ...
0
votes
0answers
185 views

SonicWall Routing Between VLANS

We have a sonicwall NSA 3500, x4 has 2 vlan interfaces so x4:v300 and x4:v301. Each vlan has an IP v300 is 192.168.100.1 and v301 is 192.168.101.1. I then have x4 connected to a layer 2 only switch ...
0
votes
0answers
77 views

Firewall Ports for Toshiba CIX server

Other then SIP ports: 5060 and 5061 what other ports need to be opened to have a phone set up in a satellite office with via external IP address. Phone Server CIX100 Firewall ASA 5510
0
votes
0answers
221 views

Opening a port range using Open VSwitch

I am locking down a VM on xenserver to allow only port 3389 and the ports required for domain controller authentication on windows. I am trying to do this using Open VSwitch. Locking down and allowing ...
0
votes
0answers
30 views

W2008 R2 SP1, windows firewall dropping zero length packets

I'm trying to harden a Windows 2008 R2 SP1 server, and restrict outgoing packets to known rules. What I'm seeing is firewall log entries showing dropped packets, and the dropped packets are always ...
0
votes
0answers
75 views

Routing traffic from LAN over VPN link out to 'net; works from router, not from LAN. What route is missing?

I have 3 machines. 2, routers, are connected over a VPN. The 3rd is a PC on the lan behind one of the routers. internet | | ROUTER S1 external: YYY.56.52.56 ...
0
votes
0answers
100 views

Netsh Command To Block All Traffic Except A Program And A Port?

I discovered that you can use the netsh commands to control the Windows firewall, I am reading all the possibilities but I didn't found yet what I am looking for. Is it possible to use netsh ...
0
votes
0answers
47 views

Will pfctl -sr show ordered rules when using -o profile?

When I enable the -o profile option with pf will pfctl -sr show me the new order of the rules?
0
votes
0answers
163 views

OpenWRT firewall redirect punch through

I am using an OpenWRT based firmware on a Netgear router as part of a research project that links the router to an existing broadband router to allow members of the public to access the internet via a ...
0
votes
0answers
92 views

Checkpoint Firewall - R75.3 - how to view time of recent CLI change

I'm trying to figure out when a colleague processed a change in the last couple of days. Very in experienced in expert or router modes. Any tips? Regards!
0
votes
0answers
317 views

HTTP not redirecting to HTTPS, Router or Firewall Issue?

I manage an application server in a different department from IT and since they implemented a new firewall as part of emergency maintenance, users are having issues accessing the web app(Blackboard). ...
0
votes
0answers
611 views

FreeBSD 10 IPFW IPv6

I'm struggling to allow IPv6 connections on my FreeBSD 10 server. I have a working IPv6 connection. But IPFW blocks all the IPv6 traffic. #!/bin/sh # # flush existing rules ipfw -q flush # allow ...
0
votes
0answers
2k views

VPN pptp connection Unable to pass through linux iptables

I have set up a windows VPN server behind Linux - Ubuntu box that is working as firewall and proxy server. Now I want people from outside to be able to connect to the VPN server, but the connection is ...
0
votes
0answers
519 views

Port Forwarding to a VPN Client

I'm looking for some help getting a port forward setup to a VM running Ubuntu 12.04 on my LAN. I can forward the port to the VM successfully and connect to the service over the Internet. But when I ...
0
votes
0answers
137 views

Multiple gateways with linux on same subnet using single NIC

I have the following configuration; Firewall 1 (site 1); x.x.x.x/26 subnet on external 10.0.0.0/8 on internal (internal IP 10.0.0.10) Firewall 2 (site 2); x.x.x.y/26 subnet on external 10.0.0.0/8 ...
0
votes
0answers
284 views

SonicWall NSA2400 after firmware upgrade to 5.9 - not able to log some intrusion prevention/detection statements

After upgrading firmware to 5.9 version I'm not able to log intrusion prevention/detection for statements like PHP CGI Argument Injection, Remote Command Execution, Remote File Inclusion, WEB-ATTACKS, ...
0
votes
0answers
460 views

Connecting internet uplink to switch or firewall

While I am using Cisco kit, this isn't really Cisco related, more general network design. In the past I have connected internet connections straight in to a layer 3 core switch, 3750X's, 6509's and ...
0
votes
0answers
25 views

Advanced Windows Firewall - Strange logging behavior

I have created a GPO that set's several firewall rules to Windows Server 2008 R2 machines within a specific OU. The default behavior is set to block on inbound and outbound on all profiles. Also I did ...
0
votes
0answers
253 views

how to whitelist ip, port, protocol and app on a router?

I am looking for the simplest but robust solution to allow user accounts under Windows Server 2012 to use GitHub.com with the GitHub app, but otherwise not a peep is allowed from the server to reach ...
0
votes
0answers
43 views

IPTABLES Limiting destination based on source?

I am trying to have a bridge firewall between my network and IPMIs. I want to be able to limit the allowable destinations, e.g. IP x.x.x.x has access to x.x.y.y and x.x.y.z but no others while IP ...
0
votes
0answers
143 views

Why does firehol generate an iptables ACCEPT rule on top?

Firehol generates iptables rules from a convenient configuration file. In my /etc/firehol/firehol.conf I have the following very simple configuration to allow incoming connections on http, https and ...
0
votes
0answers
136 views

Linux set routing based on MAC address + failover

In my company we have a relatively small network. Than we have 2 different WAN (via ADSL and SHDSL) connection behind 2 different hardware firewalls (Zyxel and SonicWall). Those are connected to our ...
0
votes
0answers
121 views

Routing static IPs

This is probably a simple question for you experts. I have a BT infinity business broadband account, that offers 5 static IP addresses. I'm trying to expose a server on one of those addresses. This ...
0
votes
0answers
455 views

Windows Server 2003 - Block outgoing traffic of program

I need to run a program on Windows Server 2003. I need all in AND out traffic to AND from this program to be blocked, EXCEPT if the origin/destination is 127.0.0.1. I have to only block this one ...
0
votes
0answers
196 views

How to allow only a country on APF

How I can block all countries and just allow connections from IPs from Brazil to my server using APF? I've searched some ways but none are using APF at all. Some of them make me download a huge list, ...
0
votes
0answers
354 views

Client can not access some HTTPS through Squeeze gateway

I have a gateway (+firewall +proxy) set up on a Squeeze box with 2 NICs. The problem is the client cannot see some of the HTTPS (for example they can go https://mail.google.com but not ...