Concerned with software or hardware firewalls

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4
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2answers
4k views

Windows Firewall Connection Security with Certificate

I've been fiddling with the Windows firewall configuration of some computers within a VMWare based LAN (no domain). To aid in my testing and debugging, I created a small, self-hosted console ...
0
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2answers
164 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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votes
2answers
205 views

How to limit source port for accessing blocked website?

My country has a firewall which blocks sites like Facebook, whatsApp etc. However, they use some kind of port blocking, so some important websites for me like Chegg is also getting blocked I think due ...
1
vote
1answer
31 views

How to best manage multiple applications using the internet with Firewall

Im not new too Linux (Ubuntu 14.x) however I must admit that I have never bothered with a Firewall until now. Im currently using Ubuntu's inbuilt firewall (UFW) with a graphical plugin (GUFW), which I ...
1
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1answer
19 views

Does altering the routing table to my hub defeat the purpose of a VPN?

I am running a VPN on my server with openvpn. When running openvpn I have a shell script that runs afterwards: ip rule add from 192.168.0.19 table 128 ip route add table 128 to 192.168.0.0/24 dev ...
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1answer
215 views

Using nmap to bypass a firewall and perform OS fingerprinting

How can I use nmap to perform operating system detection on a system which has all of its ports filtered by a firewall? Is there a way to bypass it? I have tried: syn scan, xmas scan, fragment scan,...
0
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1answer
26 views

Two Factor Authentication VPN

I have a VPN connections Site to Site VPN, for security reason, I want to add 2FA Can I set up 2FA on VPN ?
0
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1answer
18 views

Default GW IP address shared with management interface IP: any securirty implications?

Building out separate VLAN for management interfaces. The proposition is to use Default GW IP address as a management interface for network device. Any security concerns?
0
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1answer
85 views

Why does DNS Spoofing not working on HTTP ,HTTPS Sites? [in my case]

I am trying to perform a DNS spoofing attack, but the confusing thing is that when I'm performing the attack on HTTP sites, nothing happens. But when I perform it on HTTPS sites, when I reach the ...
-1
votes
1answer
94 views

What is the difference between ASA 5505 Security Appliance and without Security Appliance

Considering the two devices, ASA 5505 Security Appliance and without Security Appliance. What are the differences between having security appliance and without security appliance? I can not find the ...
3
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0answers
108 views

Modifying shell code to bypass Windows Firewall

As part of my OSCP's training, I'm supposed to get a shell on a Win7 machine using browser's exploit (MS12-037) with Windows firewall on. I have an idea but I'm having hard time applying it. What I'...
3
votes
0answers
268 views

Firewall in virtual machine

I'm putting my server to use as a file server and a firewall. I'm looking at KVM or Xen VM setup where file server and firewall get their own VMs and host is just supplying the hardware (so Xen way, I ...
3
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0answers
1k views

cisco asa syn flood detection and response not working

I have a Cisco ASA 5510 (ASA Version 8.3(2)) that has been getting a syn flood attack on it (or more accurately through it - targeting a host behind it) a couple of times a day for the past few days. ...
2
votes
0answers
196 views

Why my proxy is still having some connections blocked

I am behind a firewall in France. I connect to proxy A, in Ireland with Dante via SSH port 22 and make a tunnel forwarding port 1080. The proxy works as expected but still having a port range blocked....
2
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0answers
180 views

Shorewall stopped policies - routeback

Here goes a very specific question about the insides of Shorewall and Iptables in general. Shorewall supports configuration of "Stopped Policies" using the file routestopped, which defines the ...
1
vote
0answers
60 views

Fortigate monitoring with SNMP and Devmon template

I'm trying to monitor some aspects from our Fortigate firewall (like how many traffic goes through each tunnel) through a combination of Xymon, Devmon and SNMP. I downloaded the MIB files from the ...
1
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0answers
41 views

Is it possible to block a debugger from connecting locally?

I work at an enterprise with enterprise-type software on my machine regarding firewalls, virus scanning, and vpns. I'm also a developer. If I'm not connected to the internet I'm not able to debug my ...
1
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0answers
33 views

iptable ip_conntrack_max testing

I was trying to understand how ip_conntrack_max works so i have created two VM and set ip_conntrack_max to 10000 I used hping to open 10000 udp connection on VM using following command hping --udp -...
1
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0answers
115 views

how to configure naxsi to accept json format in rest apis?

For example one of my APIs is: Post request: /api/v0/login body: { "username":"xxx@ggg.com", "password":"eeeee" } I want to secure this API with naxsi, I could not find anywhere to config naxsi ...
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0answers
132 views

Web/search engine spider on local network?

I was setting up a test webserver on my local network earlier, and whilst sorting out the firewall I noticed the following in the log (/var/log/ufw.log - I'm using UFW on Ubuntu 14.04): Jul 9 14:17:...
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0answers
158 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. I'...
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0answers
333 views

Configure icefloor to prevent leaks when VPN connected

I am trying to configure icefloor firewall on OS X 10.9 so as to make sure all traffic will go through VPN. I recently notified that even with "Route all traffic through vpn" option in tunnelblick ...
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0answers
147 views

What is the security of Powershell “TrustedHosts”? (is it just a name match)?

Powershell has a TrustedHost section that is configured like this: winrm s winrm/config/client '@{TrustedHosts="CorpServer56"}' What security is implied for CorpServer56? Is it just an ASCII name ...
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0answers
336 views

How should I configure my Tor-dedicated firewall for optimum security?

I'm setting up a Tor-based isolating proxy using the 'Anonymizing Middlebox' iptables rules specified here: https://trac.torproject.org/projects/tor/wiki/doc/TransparentProxy i.e. iptables -t nat -...
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0answers
104 views

API deployment infrastructure

We are going to deploy our service, it's drupal based with some additional REST APIs. The drupal servers will be (loadbalanced) put in the DMZ. We think to deploy the REST APIs on an app server in ...
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0answers
529 views

Proxy via pfSense and exclusions for DNS

I have posted this to NetworkEngineering.SE, as that seems the more suitable audience for this question. I will leave this question open here but am happy to see it closed. I just did not want to ...
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0answers
79 views

Pf rules configuration

Do these rules appear to be an adequate start? _interface="en1" _linode="66.228.57.75" #lish-atlanta.linode.com _ssh=" { 74.207.224.182 66.175.210.225 } " set block-policy drop set skip on lo0 ...
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0answers
348 views

Throttling DropBox behind a firewall

Our office network bandwidth gets choked when an employee copies a large file into her DropBox, since it gets downloaded on several machines (of other employees). LAN Sync is an option, but needs to ...
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0answers
17 views

Filter multicast on a LAN

In my dd-wrt firewall, I see the option: filter multicast I searched a lot about filtering multicast, but I could not find a comprehensive reply about this. Should I filter multicast on my LAN?
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0answers
51 views

How to view which ports are opened on firewall?

I have a perimeter modem that should have a firewall, but the admin portal does not display much useful info on what settings it has and whether it is on or not. How would you get a list of open ...
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0answers
29 views

Cisco ASA Access List Summary / Visualisation Tool

I have a Cisco ASA firewall config with about 50 interfaces and approximately 4000 rules. I am trying to find a tool that can sort this into an easier to consume list or even a visualisation of the ...
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0answers
48 views

NetScaler config rule sample for cross site scripting attacks

I am trying to create rules to block requests to pages where XSS vulnerabilities have been detected. Lets say the /contact_us page is vulnerable to XSS, how can I block traffic trying to reach that ...
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0answers
44 views

VPN and traffic filtering

VPN server assigns to the client public ip address and doesn't offer NAT function. In this case, can firewall on the client side to filter (inspect) VPN traffic (L2TP/IPSec, IKEv2, SSTP, OpenVPN)? I ...
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0answers
192 views

Gargoyle (OpenWRT) firewall routing for VPN

At present I have Gargoyle setup on my WNDR3700 to connection to a VPN provider in order to provide a little privacy. However this prevents me from connecting remotely to my home network. Previously I ...
0
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0answers
189 views

Isolating Computer on Home Network Using Multiple Routers

My goal is to isolate a computer on my home network. This computer (a rapsberry pi) should be considered untrusted and is accessible from the internet (port 22). I need a solution that will prevent ...
0
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0answers
50 views

Windows Firewall Log question

I have a question about log entries within my Windows Firewall log. I see these kind every now and then: #Fields: date time action protocol src-ip dst-ip src-port dst-port size tcpflags tcpsyn tcpack ...
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0answers
67 views

Why does Windows realtime protection block specific URLs?

I have observed this strange behaviour with Windows (7 to 10). When active realtime protection is enabled, it blocks my own website. The page has nothing special (PHP and JavaScript), just good old ...
0
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0answers
34 views

where can we download SourceFire log/message guide?

I need to write few alerts in SIEM based on Device:Sourcefire. Can anyone let me know from where we can download Sourcefire log/message ID as CISCO ASA firewall has it.
0
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0answers
69 views

Unfamiliar connection alert on Little Snitch

I've got a Macbook running Yosemite 10.10.5, on wifi, sharing it with three other people in the household. I currently have Avast on my Macbook (I know, I know), and its web shield works by acting as ...
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0answers
28 views

Firewall issues

Background I have an Android device (Minix M5) that I handed to a customer The device only does outbound connections, so no inbound traffic The customer confirmed that s/he opened up the ports ...
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0answers
495 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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0answers
465 views

Is there any method to prevent/trace ddos attack?

I have a debian linux server which run a few online game services. I have some competitors in this area and i think one of them is behind the ddos attacks. I have full access to the router, so I set ...