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Should I use firewall by modem? | Problem solved by switching to ZoneAlarm

Heinrich Pesch — Wed, 10 Jan 2007 15:44:00 +0000

Forum: Safe computing
Topic: Should I use firewall by modem?
Poster: Heinrich Pesch
Post title: Problem solved by switching to ZoneAlarm

I have now the hardware firewall configured, but the connection was as sluggish as before, even after de- and re-installing my F-Secure 2006 and chosing the Office-setting for the software firewall. I noticed though, that my spare laptop running the free version of ZoneAlarm, is much faster connected to the same Wlan-modem.
So I deinstalled F-Secure and installed the trial version of ZoneAlarm Internet security and voilà, all is well again.
Don't ask me why, but now I get instant access to all sites where I had repeatedly time-outs since many weeks.

I had ZA in use prior to 2005, why on earth did I change to F-Secure?

Cheers
Heinrich

Should I use firewall by modem? | Exactly, and here's my two cents

tectranslate ITS GmbH — Tue, 09 Jan 2007 12:03:00 +0000

Forum: Safe computing
Topic: Should I use firewall by modem?
Poster: tectranslate ITS GmbH
Post title: Exactly, and here's my two cents

[quote]Claudia Krysztofiak wrote:

We have been working with a hardware firewall for some years now and are very happy with it.

Recently, though, an IT security expert told us, that while many modem firewalls are a good protection against attacks from the outside, they often do not block calls from your PC to the Internet, so they are useless against software/applets installed on your machine, which are "calling home".[/quote]
That is correct. Any router wit NAT functionality is an efficient first level of defense against most "classic" attacks that would affect any PC connected directly to the Internet. This is due to technical reasons - the router does not even know which computer to direct the hacker's incoming packets to, unless the operator expressly creates a port forwarding scheme to open up the PC towards the Internet.

[quote]We installed a software firewall on one of our PCs to check this statement and found it to be true with our modem firewall. So if you care for your privacy, check the specifications of the hardware or modem firewall you wish to work with, whether you can customize it to block calls from the inside as well. The good ones can, as we were told.[/quote]
That is also correct, but such a firewall is much more complex than the old IP-level packet filtering firewalls, which leads to a higher price and higher demands on the IT proficiency of the human system operator.

I find that if you are disciplined in your use of Internet resources (don't download pirated software or other stuff from dubious sources, don't open unrecognized attachments etc. pp.) and have a decent anti-virus package, you should not normally require a Personal Firewall (i.e. software) .

Best regards,
Benjamin

Should I use firewall by modem? | AFAIK

Uldis Liepkalns — Tue, 09 Jan 2007 00:29:00 +0000

Forum: Safe computing
Topic: Should I use firewall by modem?
Poster: Uldis Liepkalns
Post title: AFAIK

only two components are necessary- firewall- I have Linksys rooter at the office (specialists told me it looks just like computer running XP to anyone trying to break into from outside- though it runs a very cut-off version of Linux) and anti-virus (up-to-date KAV-6-first service pack) on every network computer- automatic database updates every hour and you can set your protection level automatically- either only against viruses, all known malware or even every registry entry change, which should be confirmed manually. I switched off the later option (though it gives you maximum protection) because it becomes nagging to confirm every half an hour that you allow your Logitec keyboard to act as a key-logger :)
It also doesn't allow any program on your computer to send out anything- unless you have explicitly allowed it.

OTOH, in this configuration software firewall (ZoneAlarm) started to cause problems with Intranet, so we discarded it as unnecessary.

At my country place, where I have only one computer, I use ZoneAlarm light (I don't need the other functions, as I have all the same in KAV) and also it serves well. Actually I have not had any problems for some 8 years.

Uldis

[Rediģēts plkst. 2007-01-09 00:30]

Should I use firewall by modem? | I have three firewalls!

Oliver Walter — Mon, 08 Jan 2007 23:47:00 +0000

Forum: Safe computing
Topic: Should I use firewall by modem?
Poster: Oliver Walter
Post title: I have three firewalls!

[quote]Mihai Badea wrote:
Two software firewalls would conflict with each other, but, for maximum protection, it is recommended to have both a hardware firewall and a software firewall.
See [url removed]
[/quote]
I actually have 3 firewalls: one is the Zone Alarm software that runs in the PC; one is the hardware firewall in my broadband router; the third is provided by my ADSL service supplier. They can all work as they are not competing for any resources, as would be the case with two software firewalls in the PC. Each one simply lets through, or blocks, data in transit, and the data that is not blocked is then passed on to the next firewall. Claudia's point about outgoing traffic is a good one. Zone Alarm can certainly be told how to handle this, but apparently the Windows XP firewall can't (according to my book "Microsoft Windows XP Inside Out").
I also like ZoneAlarm because its icon in the taskbar has "meters"that show me when data is flowing into or out of the computer.
Oliver

Should I use firewall by modem? | Hardware firewall + software firewall

Mihai Badea (X) — Mon, 08 Jan 2007 19:26:00 +0000

Forum: Safe computing
Topic: Should I use firewall by modem?
Poster: Mihai Badea (X)
Post title: Hardware firewall + software firewall

[quote]Samuel Murray wrote:

IMO one firewall should be enough. Two don't always work well in tandem.
[/quote]

Two software firewalls would conflict with each other, but, for maximum protection, it is recommended to have both a hardware firewall and a software firewall.

See [url removed]

Should I use firewall by modem? | Hardware Firewall is fine but ...

Claudia Krysztofiak — Mon, 08 Jan 2007 14:47:00 +0000

Forum: Safe computing
Topic: Should I use firewall by modem?
Poster: Claudia Krysztofiak
Post title: Hardware Firewall is fine but ...

We have been working with a hardware firewall for some years now and are very happy with it.

Recently, though, an IT security expert told us, that while many modem firewalls are a good protection against attacks from the outside, they often do not block calls from your PC to the Internet, so they are useless against software/applets installed on your machine, which are "calling home".

We installed a software firewall on one of our PCs to check this statement and found it to be true with our modem firewall. So if you care for your privacy, check the specifications of the hardware or modem firewall you wish to work with, whether you can customize it to block calls from the inside as well. The good ones can, as we were told.

Hope that helps. :-)

Should I use firewall by modem? | Safest Option

Cetacea — Mon, 08 Jan 2007 12:42:00 +0000

Forum: Safe computing
Topic: Should I use firewall by modem?
Poster: Cetacea
Post title: Safest Option

When I switched to an ADSL connection a year ago, my computer technician wouldn't hear of anything else than a hardware firewall to protect my system, and since his advice has always been sound to say the least, I chose a modem providing that option. I have never regretted that decision: My internet connection is very fast, no problems accessing the sites I want to get into (including internet banking), and, most importantly, nobody accesses my machine, even though judging by the modem's protocol, there have been attempts to do so.

In other words, I can only recommend using your modem's firewall, both for reasons of security and convenience.

Maybe I should add that I only use one firewall, i.e. the router's hardware firewall rather than a software firewall.

[Edited at 2007-01-08 12:44]

Should I use firewall by modem? | One firewall should do it

Samuel Murray — Mon, 08 Jan 2007 12:40:00 +0000

Forum: Safe computing
Topic: Should I use firewall by modem?
Poster: Samuel Murray
Post title: One firewall should do it

[quote]Heinrich Pesch wrote:
...I wonder should I also use the firewall the modem can provide or should I continue to leave the firewall function to F-Secure.[/quote]

IMO one firewall should be enough. Two don't always work well in tandem. You can have two anti-virus softwares co-habit peacefully on your computer, but two firewalls may interfere with each other as they both struggle (with each other) for control over your ports.

I'm not an expert in firewalls, but isn't a firewall a firewall? What does the firewall do except control access to your ports? Why should one not be enough?

Should I use firewall by modem?

Heinrich Pesch — Mon, 08 Jan 2007 12:05:00 +0000

Forum: Safe computing
Topic: Should I use firewall by modem?
Poster: Heinrich Pesch

I work on a laptop with XP Pro and F-Secure Internet Security. After I finally managed to install WEP-encryption on my Wlan-modem, I wonder should I also use the firewall the modem can provide or should I continue to leave the firewall function to F-Secure.
The problem is my internet connection seems sluggish, internet banking is often not possible and one has to click again on links that will not open at the first time.
Initially I had Norton installed, but I did everything to get rid of it.
What do you think?
Cheers
Heinrich