Concerned with software or hardware firewalls

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Give Someone Access to Secure Website?

I have someone I hired on Freelancing website working for me - so far he has worked for me for about two weeks and is doing a good job. In order for him to complete his work he will need access to ...
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29 views

how to test clones site [on hold]

I want to find a vulnerability in a site which end in .aspx and this is what I have so far: The system server is IIS 7. System OS is Windows Server 2008. I have found a URL in site maybe its so ...
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10 views

Software Defined Perimeter assumptions, properties, deployment scenarios

Since 2013, the Cloud Security Alliance has been working on an open protocol and open source code base for a "Software Defined Perimeter" (SDP). But the whitepaper at SDP Specification v1.0 : Cloud ...
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2answers
149 views

VyprVPN (from GlodenFrog.com) weirdly keeps sending unauthorized suspecious data even after uninstall [on hold]

Update: Check the VyprVPN's app developer answer below, seems this is okay and an uninstaller is added to new versions to prevent such issues. Original: I was working with VyprVpn a few months ago, ...
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0answers
15 views

How do I secure a Windows machine via the Advanced Firewall [on hold]

I am trying to secure my Windows based machine via the Advanced Firewall and so far I have blocked ICMP and ICMPv6 Echo Requests since I hear a DoS can be done in this sort of way.What other rules can ...
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9 views

Should I add signatures to the Netscaler Application Firewall for Exchange, Cognos, etc?

This link describes that I can use Cenzic, IBM AppScan, Qualsys, Trend Micro and Whitehat files to create an application filter for various products. I'm looking for filters that apply to commonly ...
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34 views

Host-based security architecture for web server network

I am begining with network security and after studying for a while about often used technologies I got to this architecture for my home server (sorry it is not in english). I considered 3 basic ...
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61 views

How to Bypass Firewall [closed]

Last Day I had an interview as security engineer and I was asked a question as below "If you have a web server behind the firewall and you have only access this server through port 80 . If I told you ...
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2answers
75 views

NMap to scan a private subnetwork

I have a test network setup based on virtual machines. My host machine, a web server and the firewall is under the 192.168.0.0/24 network (gateway is 192.168.0.1); a server machine is located behind ...
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2answers
46 views

Security devices other than firewall and IDS [closed]

I was just studying about firewalls and IDS/IPS and had a doubt. Are these the only two major security devices that a company invests in? or are there other equipment and security controls?
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3answers
147 views

Most secure location of database

Let's say I have a straight forward completely database driven web site application and I store my database on my web server in the DMZ. I won't be broadcasting the IP address of my database because I ...
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2answers
77 views

Does anyone know how / what this technique is called? [closed]

When using public wireless it needs you to sign in and from what I've gathered it allows you to have access to the internet and provides you with your own network and is not shared with any other ...
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1answer
1k views

Why is Windows Explorer making external connections?

I'm seeing Windows Explorer (explorer.exe) establishing connections to external IPs: Also verified with cmd: C:\Windows\system32>tasklist|find "explorer.exe" explorer.exe 4052 ...
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7 views

Unable to resolve ip forwarders on DNS windows server 2008 r2 [migrated]

I'm trying to build a mail system using exchange server 2010. At that time, only mail can send from outside to inside via a TMG firewall. Any email from local to the Internet were not able to send. So ...
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0answers
37 views

Is it safe to whitelist CDN domains?

I am trying to whitelist URLs for my PC but I want to eventually roll out the rules to my small company's firewall. But I'm having trouble with CDNs since a page may load content from many distinct ...
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1answer
66 views

Do I need dedicated firewall? [closed]

I have two servers in the datacenter. FreeBSD <--> Windows Server FreeBSD configured as a gateway for Windows Server. What is the best: FreeBSD has only firewall. All services are on the Win ...
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0answers
66 views

How the firewall is allowing Facebook requests to bypass itself? [migrated]

I've a McAfee Firewall configured at my workplace. It actively blocks all the requests for websites like https://www.Flipkart.com https://www.Amazon.com https://www.Facebook.com I's playing ...
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1answer
47 views

Terms for input/output to and from a Firewall

Is there an official/standard term for the stream of data sent into or out of a firewall? Obviously the inbound traffic would be the traffic under surveillance, and the outbound traffic would be the ...
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17 views

Setting up a new DMZ for Web Servers [migrated]

When it comes to security, VLAN ACL's, firewall DMZ policy and the like I am a Newb. So any help will be appreciated. We are trying to architect our network to place all of our web accessible ...
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0answers
53 views

Linux iptables DNAT on incoming packet without conntrack (stateless) [migrated]

In my linux box 10.20.1.1, i got two UDP apps binded on port 46000 (App A) and 36000(App B) respectively. The apps communicate with two UDP servers bindeded as 10.10.1.1:36000 (Srv X) and ...
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1answer
80 views

IP over HTTP GET only

Consider the following scenario: There is a client behind a really strict firewall. There is nearly nothing available to 'connect to the internet'. Just DNS resolution and HTTP/HTTPS (some whitelisted ...
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1answer
43 views

Block An IP Address Scanner On Mac [closed]

I'm working on an prototype that can spot network scanners, which is working and it spits out the IP address of the scanners, but I need to block them now. Is there any way to block an IP address ...
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2answers
75 views

Inspecting every packet leaving the system for sensitive information ? [closed]

Is there a way to check every packet leaving the system for sensitive data like IP addresses, personal information (like logins) etc ? A free (and preferably open source) program which does this for ...
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2answers
107 views

using html5 websockets to bypass firewall TCP policy

I've read that html5 enables opening tcp sockets from the client side in its "websocket" feature. Firewalls as I recollect may be configured to block tcp connections initiated from "the outside" by ...
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1answer
71 views

How much of your web browsing behavior is VISIBLE to the administrators when you're behind HTTPS or VPN? [closed]

For example. If you're behind a VPN and want to get on on facebook and youtube. Will all outgoing traffic need to make a request to the firewall first? I don't really know extensively how well a ...
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2answers
421 views

What does a Firewall mean by “connect to TCP port without your permission”?

McAfee is reporting incoming network connections blocked from IPs like 198.252.206.149 (StackExchange Inc.), 54.179.231.116 (Amazon Technologies Inc.), 74.125.68.106 (Google Inc.), etc. The ports ...
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1answer
348 views

Understanding OpenWRT LuCI Firewall Routing with VPN

I'm still fairly new to networking, and I'm having a little trouble grasping some concepts of the proper firewall rules I need to implement for my desired setup. I'm setting up a router with OpenWRT ...
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2answers
110 views

Decrypt and then re-encrypt all requests to the internet at firewall level

I don't have strong skills about this matter but I am very curious about the following communication so may I ask: One institution sent a message to all network users saying that "all requests to the ...
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1answer
296 views

Should a server be considered compromised simply because a port was open?

Earlier today I received a notification of a security incident at Mandrill. At first I was concerned, but then after I dove into the details I became confused as to why they considered this noteworthy ...
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2answers
89 views

How do people typically perform security audits of firewalls?

In my days as a pentester, we used to use tools like Nipper, combined with manual analysis, to perform audits of firewall configurations. However, in my current company we have many different ...
4
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1answer
106 views

Firewalk through a Firewall on our subnet

Having trouble firewalking. I am trying to determine all the open ports on my firewall/gateway. Here is my lab network diagram: (Skip to the bottom of the following explanation for a direct list of ...
3
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1answer
66 views

IPsec: Is AH in tunnel mode secure?

I have a site-to-site IPsec VPN which was performing poorly (10 -20% upload/download speeds as a percentage of available WAN circuit bandwidth) when using ESP in tunnel mode with DES encryption and ...
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92 views

explorer.exe outbound (Unexplained TCP Connections)

So I've already disabled SSDP Discovery in Windows Services. I'm also not conducting any searches. I also have file indexing disabled on my system. I noticed a number of outbound connections coming ...
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1answer
62 views

Segregating a Printer in my Enterprise Network

I have a EAP-TLS network at home which I've managed for some time now. I just got a new Brother HL-5470 printer so I can finally print things at home, which is really nice. The only problem is that ...
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1answer
36 views

Is it a good idea to disable WHM backend and only enable it through ssh when needed?

I have recently set up a managed VPS and it came per-installed with CentOs and WHM. I have configured SSH logins to use private keys and i can SSH into the server with root privileges. I realize ...
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39 views

Firewall requirements for SaaS service providers

I have not had much success compiling a workable overview on the topic of firewalls and application service providers, despite making a rather extensive contribution to Google's workload this month. ...
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2answers
82 views

Preventing ARP spoofing in DMZ

Is there any possible way to implement a defence mechanism in a firewall to be able to prevent ARP spoofing in a DMZ. Our DMZ server consist of two webservers and a database (which should be available ...
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1answer
66 views

Can NATs and firewalls blacklist IPs when trying to UDP hole punch?

I am developing a P2P application that will make use of UDP hole punch to connect two peers behind NAT. When dealing with connections between a cone and a symmetric, unpredictable NATs, however, hole ...
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1answer
49 views

Acceptable secure solution to replace static IP addresses for a web application

I am currently working as a technical lead on a project at a financial institution and have a question about how to provide the same level of security expected by the business in an application we are ...
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0answers
44 views

Windows Firewall single rule with multiple IP addresses vs multiple rules with single IP address [closed]

I've tried finding some resources to help me on my dilemma, but wasn't successful in my approach. So here goes: I am implementing an automated firewall manager for Windows Firewall which will ban ...
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2answers
153 views

Google DNS in Firewall logs

I was viewing my firewall logs and come across the IP 8.8.8.8. Further check reveals it belongs to Google DNS. And such traffic has been going out from some of our LAN segment PCs. From here on, how ...
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2answers
113 views

Why does a nmap scan give different results depending on whether it's run from inside or outside a LAN

I am testing/setting up a Thompson TG585v7 router/firewall. Results when running nmap from a computer INSIDE the LAN $ sudo nmap -O 210.86.xxx.xxx Starting Nmap 6.40 ( http://nmap.org ) at ...
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2answers
142 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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2answers
69 views

Expose the source code repository externally or allow VPN access?

To allow third party consultants, offshore developers and contractors working on the code, we can expose our Git repository externally. Or we can grant VPN access to the external parties and limit ...
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107 views

open ports on a netgear N-150 router; disable SPI firewall? [closed]

How do I open all ports? At least internally, for LAN traffic from 192.168.1.x to 192.168.1.x I want all ports open. Even if it creates a security problem. thufir@doge:~$ thufir@doge:~$ nmap -p ...
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2answers
188 views

Prevent hacking with known IP address and router information on Ubuntu 14.04 LTS [closed]

I’ve had it! It is the second time that a “hacker” (A hacker or should I say thief) has had access to my Ubuntu 14.04 LTS system. The person that I suspect has had physical access to my pc because he ...
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1answer
42 views

Can sshd block IPs with failed attempts or is a tool like denyhosts or fail2ban necessary?

I am only indirectly familiar with denyhosts (and only just discovered fail2ban) and they certainly seem like worthwhile tools. However, after looking through the options for sshd_config I am trying ...
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1answer
171 views

Setting up own enterprise SOC

the other day I was talking with a service provider (MSSP) who have experience with operating SOC (security operations centre) 24x7. Their price was rather steep (in the millions range). I don't ...
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1answer
66 views

Do the firewall hardware specifications have to be better than the network it protects?

If I need a bodyguard I'll have to hire someone whose muscles are much tougher than mine. If a server can't handle a DoS/DDoS attack because it consumes it's resources does this mean the firewall has ...
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1answer
51 views

How to manage Cisco ASA series without management cable? [closed]

How can I manage my Cisco ASA device without the management cable? I have not set it up at all, but I have physical access to it.