Concerned with software or hardware firewalls

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2
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3answers
249 views

Suspicious VMWare connections that bypass firewall

I'm running VMWare 5 and I have found that when I start up VMWare I see two connections: TCP 10.100.100.161:55555->as-40816.engx.vmware.com:https (ESTABLISHED) TCP ...
1
vote
2answers
208 views

Are KIS 2014, Malewarebytes Pro and SpyBot sufficient to prevent internet attacks?

As mentionned in the title, I have KIS 2014, Malewarebyte Pro and Spybot installaed on my windows 7 (regularly updated). I regularly scan my pc for viruses and spywares and clean it with Glary ...
3
votes
2answers
278 views

Using only a firewall, how do I protect a database server from be exposed?

If I had two firewalls, I could put a web server within a DMZ and then with the second firewall restrict the access to the DB server. However, If I only have one firewall, how could I accomplish ...
5
votes
3answers
4k views

Difference between IDS and IPS and Firewall

The differences between an IDS and a firewall are that the latter prevents malicious traffic, whereas the IDS: Passive IDS: the IDS only reports that there was an intrusion. Active IDS: the IDS also ...
1
vote
1answer
230 views

Is there a supported way to run a custom log export script at boot time in Checkpoint's Gaia OS?

Specifically, we're using fwm logexport piped to logger to dump the audit logs in real time via syslog to our SEIM. It works great if the command is run manually (in the background) from the "expert" ...
3
votes
1answer
107 views

Who watches the watchmen? User empowerment over firewall behaviour on a personal computer

I've been exploring the gamut of free Windows firewall applications recently and have encountered the following problem: The better firewalls are excellent at stopping other apps from phoning home ...
1
vote
1answer
46 views

Moving all servers to routeable IP Addresses

Company I am consulting to wants to move all their servers from private IP space to public IP space. I'm am trying to convince them that this is a bad idea that it makes sense to move only certain ...
1
vote
2answers
67 views

Should I use a firewall even though I am on a private vlan inside a data-center?

Working on setting up some new infrastructure and I want to configure everything so that it's as secure as it needs to be, but I don't want to worry too much about adding additional unneeded ...
0
votes
1answer
93 views

Packet filtering firewall - (Network Layer) [closed]

I would like to know what does this particular rule of the packet filtering firewall ruleset do: Source Address: Any Source Port: Any Destination Address: 192.168.1.0 Destination Port: 1023 and above ...
2
votes
1answer
330 views

Expose web service in a secure manner

Requirement I have a web service I need to expose on the DMZ for external communication. The web service communicates directly with a critical database that sits on an internal net. Current ...
-1
votes
1answer
72 views

Benefit of having strict ACLs [closed]

My company uses strict ACLs for the connection between two boxes. What are the benefits of these?
-1
votes
2answers
139 views

Linux: Blocking outside attempts at attacking computer

in the past when I wanted to block outsiders from attempting to start connections with my Linux machine's various TCP services, what I was told to do was to add this line to /etc/hosts.deny: ...
2
votes
2answers
279 views

Benefits of REJECT over DROP on a single PC

Recently I learned about the difference between DROP and REJECT in a firewall. I understand that REJECT is better because it closes the connection immediately instead of waiting for timeout as DROP ...
1
vote
1answer
98 views

Why do outgoing rules have priority over incoming rules?

I've been spending the morning playing with my routers and I've checked one thing: All of them come by default with an implicit deny configuration for incoming traffic, that is all packets should be ...
1
vote
1answer
246 views

Limit BitTorrent Sync connections to a specific network

Is it possible to limit BitTorrent Sync connections to a a specific network using the client software? Right now the closest I can come up with would be IP limitations imposed on each client using a ...
1
vote
2answers
60 views

Handling security with sub-domains pointing to boxes

Generally, despite running hardware+software firewall combos and keeping every layer 7 aspect of the box secure, I don't like to disclose the direct IP addresses of our servers to the public as a ...
2
votes
5answers
913 views

SYN flooding attack causing high CPU on hardware firewall

I have a ZyWall USG 200 firewall. A few days ago there was a SYN flooding attack on it causing 100% CPU load. After investigating it turns out this was attack from a single IP address and while the ...
0
votes
3answers
10k views

How to effectivily block torrents on my network?

Hie, As per my network policy, we have to block all torrent traffic from network. To do this, I used to block all ports above 1024 on my firewall/proxy devices. But due to this, many other ...
2
votes
1answer
79 views

Windows: Any method to enforce user confirmation before the browser opens a URL requested by an external desktop app?

A robust outgoing firewall will protect against desktop applications directly connecting to the internet without your permission. However, as the browser is a generally authorized application for ...
-2
votes
2answers
99 views

Why do home internet users cant communicate with their peers? [closed]

As a home internet users, why does my ISP block my communication with any other client on the same subnet as mine? It is done for security obviously, but what is the risk? Update: as clarified by ...
1
vote
0answers
85 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 ...
7
votes
2answers
883 views

Kerberos authentication over the public internet

What are the threats to having the KDC accessible via the internet for remote clients? It's my understanding that the authentication is a challenge/response protocol and that the password is never ...
-1
votes
1answer
63 views

firewall settings for VPN

In my firewall settings there are options for "Allow VPN connections via PPTP" and "Allow VPN connections via L2tp-IPsec". All of my internet traffic goes through a VPN. Should I have these settings ...
0
votes
1answer
61 views

hijacking fedora or ubuntu or windows upgrades on the fly

is It theoretically possible to hijack (I mean substitute on the fly) the fedora or ubuntu or windows packages upgrades if a cracker has owned the company's firewall/proxy ?
5
votes
5answers
439 views

Can hardware firewalls be infected?

If a computer is directly connected to the internet, it is vulnerable to attacks. So we attach a hardware firewall between the computer and the internet. But doesn't this new setup mean that now our ...
1
vote
1answer
608 views

Does a network behind a NAT\modem firewall need a firewall?

Would it be justified for a business that is behind a SOHO router\WIFI to run a firewall such as PFSense, or is the firewalling capabilities in the router "good enough". For the most part the router ...
0
votes
1answer
54 views

Level of Data Security in iOS [closed]

How secure is the data stored on iOS devices, specifically app data like notes, pictures, etc.? Are there any ways to make it more secure?
1
vote
1answer
189 views

fail2ban and iptables

Should fail2ban be the master of iptables rules? For example, should I setup my firewall rules along side the fail2ban rules, or should I have all my services configured and managed by fail2ban? ...
2
votes
0answers
77 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 ...
3
votes
3answers
227 views

Are local firewalls necessary

Is having local firewalls enabled on machines actually necessary if you run hardware based firewalls like pfsense or a netgear fvs338 and use that to control in/out bound connections? I personally do ...
-2
votes
1answer
6k views

How to run any application through a proxy with PUTTY? [closed]

Maybe I did not search for it the right way but I could not find the solution. Maybe I am misinformed but if I understand correctly I could use PUTTY to run any Windows applications through a proxy ...
0
votes
1answer
203 views

Remote Administration Tools and firewalls

I was faced with a question a few days ago, regarding how a RAT server can reach out through the firewall and connect to the client. This was something that I've never given any thought to before, so ...
1
vote
1answer
414 views

Isolate a Virtualbox VM from local network [closed]

I have the need to isolate a virtual machine created with Virtualbox from the local network but I need to provide internet access to that machine. It is the first time that I face this kind of ...
1
vote
3answers
628 views

Is an outbound firewall connection 'safer' than an inbound

We're trying to determine if pushing data through a firewall is more safe than pulling it. The data will be from SSIS to SSIS through the firewall. An advisor here has suggested that pushing the data ...
5
votes
4answers
478 views

One time password over SMS - exposing the Authentication Server to the internet

Consider a Internet Based Website which does authentication. The Web Application can do the authentication by calling an Authentication Server which is not connected to the internet. The ...
5
votes
1answer
4k views

Firewall defined Akamai IP Range [closed]

With obvious dangers of opening up a wide range of ips, does anyone know how I can get a source of IP ranges for Akamai? When talking to Akamai they say 'not possible' which I find surprising. I ...
1
vote
1answer
299 views

Assuming no MITM, is Gmail communication 100% secure and private?

I sometimes have to use my personal Gmail account from my company workstation, where I know for fact they are using content-aware firewall(s) like Palo Alto, and potentially other nasty things like ...
2
votes
2answers
214 views

Firewall & TCP Traffic

I have a question regarding network firewalls and TCP traffic. When a firewall rule is set to block either inbound traffic, outbound traffic, or both on a port, does that only apply to initial ...
2
votes
2answers
380 views

Mixing stateless and stateful firewall rules

I have been advised that mixing firewall rules that are both stateful and stateless can lead to trouble when it comes to troubleshooting. Is there any truth in this? Take the following two rule sets ...
1
vote
2answers
131 views

IPTable Security between two servers

Is using IPTables to only allow traffic between two servers considered an acceptable practice? For example TCP traffic on a defined port. I realize this is referred to as an ACL but how secure is ...
2
votes
1answer
179 views

How are IaaS Virtual Machines Isolated?

I am currently examining Hypervisor firewalls for my graduate thesis, but I unfortunately don't have a lot of experience with IaaS environments. How are IaaS Virtual Machines network isolated from ...
2
votes
1answer
384 views

Why are some ports reported as closed by nmap?

I was scanning a machine from inside the same LAN which is running and up to date Windows XP Home Edition which I suspect may be running some malware. The target machine has an up to date antivirus ...
-1
votes
1answer
313 views

Is there a way to get OS X to start a VPN connection before allowing network traffic? [closed]

I'm running OS X 10.8 and have Tunnelblick set up so I can connect to my OpenVPN server at home. I've also used this at $WORK in the past. When I'm out and about and want to jump on a public network, ...
0
votes
2answers
220 views

File shares from a DMZ into an internal network

We have a firewall policy that prohibits MS RPC through firewall, particularly from internet facing DMZ's back to the internal network. There is a business unit requesting an alternative method to ...
1
vote
1answer
126 views

Do I need logging enabled in my rules in IPFW for sshguard-ipfw to work/blacklist ip's?

From the FreeBSD handbook: Even with the logging facility enabled, IPFW will not generate any rule logging on its own. The firewall administrator decides which rules in the ruleset will be ...
1
vote
1answer
354 views

How can I better protect my LAN from Internet Hackers

My computer is connected to my Netgear router which is also the switch for my network, this in turn is connected to my cable modem which is just a bridging device. My router is blocking scans and ...
3
votes
4answers
197 views

Enforcing personal firewall for OS X

We're currently doing PCI compliance, and one of the requirements is that mobile devices that have access to systems involved in processing card data have personal firewall software installed which ...
0
votes
1answer
388 views

What triggers a firewall to block a TCP socket?

I was wondering what would cause a firewall to block a TCP Java socket from connecting. What would trigger that?
6
votes
4answers
487 views

Trying to firewall ports 1863, 5190

I'm using Debian's arno-iptables-firewall and I've configured it to only allow access on the ports I need. But nmap shows ports 1863, 5190 open. What gives? How can I interrogate those ports further? ...
0
votes
1answer
295 views

Securing my firewall (both dedicated and iptables-based) [closed]

I have an ASA-5510, but I also intend to maintain strict IP tables on my server (Ubuntu 12.04.2), so that there are two layers of "protection". My iptables look like this: *filter # Allows all ...