RE: Modem Security
From: Hiemstra, Brenno (brenno.hiemstra@ignite.nl)Date: 06/10/02
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From: "Hiemstra, Brenno" <brenno.hiemstra@ignite.nl> To: "'Chris Berry'" <compjma@hotmail.com>, security-basics@securityfocus.com Date: Mon, 10 Jun 2002 11:18:44 +0200
There are different ways to use it I think.
First you need to determin if the modem only
needs to dial out of into your network. If the
modem is only used to dial out to the legacy
system of your network then configure the modem
to only allow dial-out.
If you need to use the modem to dialin from an
external network or computer then you have
several ways. You can isolate the computer
behind a firewall but like you said you then need
to allow a lot of ports that will result in an pretty
open rulebase.
You can also have some secure way of authenticating
once the user has dialed in. RSA tokens or something
like that may be an solution.
These are just a few ideas, I bet there are more
Regards,
Brenno
> -----Original Message-----
> From: Chris Berry [SMTP:compjma@hotmail.com]
> Sent: vrijdag 7 juni 2002 20:08
> To: security-basics@securityfocus.com
> Subject: Modem Security
>
>
>
> I think I've got my internet connection security coming together, but
> I'm worried about a potential back door. I have one worker who absolutely
>
> has to have a modem to contact the legacy system our billing service
> uses. What bothers me is that someone might get clever and use a war
> dialer to find this number and try and hack their way around my secure
> gateway. I'd like to make this more difficult or at least have some way
> to contain the damage. Does anyone have any ideas? I thought of possibly
>
> putting a linux box configured as a firewall between her and the rest of
> the network, but I'd have to have alot of ports open to allow all the
> services she'll need so I don't know if that would even help much.
- Previous message: John C. Welch: "Nortel Contivity tips"
- Maybe in reply to: Chris Berry: "Modem Security"
- Next in thread: Brian Shaw: "Re: Modem Security"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
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