A
Art
Home users not behind a external firewall/router ... or who shun the
Win XP firewall ... can get easily get into deep doodoo if they're not
careful.
For a project I'm working on, I installed Win 98SE on a spare 2 gig
drive. Since my LinkSys wireless PCI adapter doesn't work with Win
98/ME (don't believe what it says on the package) I bypassed my
router/fw and conneted my DSL modem directly to the Ethernet card.
I then disabled services and made sure that only TCP/IP was bound
to the internet adapter. The netstat -an result was empty as usual.
I then downloaded/installed IE 6 and did Windows Update (WU).
When I rebooted, Windows logon appeared! Sure enough, the WU
Trojan had undone my work. All the NETBIOS file/printer sharing ports
had been opened. I was lucky to not take any hits.
One way to handle fresh installs is to keep a copy of the install file
of your favorite software firewall on CD. Install it immediatley after
Installing Windows, making sure to be disconnected from the internet
during the process. Do your hardening (disabling of unwanted/uneeded
services) only after running the WU Trojan It's a good idea to do
this in any event. And keep an eye on netstat -an after every WU.
Win 2K isn't quite as bad in this regard, though I think the WU Trojan
did open at least one high numbered port. Dunno about XP but I'd be
surprised if WU doesn't destroy some hardening on it as well.
The best bet is to getcherself a external fw/router.
Art
http://home.epix.net/~artnpeg
Win XP firewall ... can get easily get into deep doodoo if they're not
careful.
For a project I'm working on, I installed Win 98SE on a spare 2 gig
drive. Since my LinkSys wireless PCI adapter doesn't work with Win
98/ME (don't believe what it says on the package) I bypassed my
router/fw and conneted my DSL modem directly to the Ethernet card.
I then disabled services and made sure that only TCP/IP was bound
to the internet adapter. The netstat -an result was empty as usual.
I then downloaded/installed IE 6 and did Windows Update (WU).
When I rebooted, Windows logon appeared! Sure enough, the WU
Trojan had undone my work. All the NETBIOS file/printer sharing ports
had been opened. I was lucky to not take any hits.
One way to handle fresh installs is to keep a copy of the install file
of your favorite software firewall on CD. Install it immediatley after
Installing Windows, making sure to be disconnected from the internet
during the process. Do your hardening (disabling of unwanted/uneeded
services) only after running the WU Trojan It's a good idea to do
this in any event. And keep an eye on netstat -an after every WU.
Win 2K isn't quite as bad in this regard, though I think the WU Trojan
did open at least one high numbered port. Dunno about XP but I'd be
surprised if WU doesn't destroy some hardening on it as well.
The best bet is to getcherself a external fw/router.
Art
http://home.epix.net/~artnpeg