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Please find the explaination in: http://www.grc.com/nat/arp.htm will VLAN solve this problem ? MAR http://www.grc.com/securitynow.htm is a good series of podcast (texted version also available)

see if you understand my question below we have a root domain MAINHUB and under root domain we have three child domains REGION1 REGION2 REGION3 they all have trusted relations I created a universal security group under the REGION1 child domain, and assign the membership to a few users in...

Hi All: Does anybody have experience working with VMWare ESX or Microsoft Virutal Server 2005 ? What we need to do is virutalize 3 of our phyiscal servers mirror them with the OS and application settings so that if in case any of the 3 production server goes down, we can bring up its virutal...

Hi All: We upgraded from NT to 2003 AD domain about 8 months ago, while still in the mixed mode (one more NT BDC), the PDC which got upgraded to Windows server 2003 is aging and slowing, I wonder if anybody can provide suggestion on how to move the main domain controller (since we are still in...

Hi All: There has been a permissoin issue with the network printer, we setup a few shared printer to have user print over the network, the printer server is an NT server, we notice some Windows XP and 2000 machines, the non-admin user cannot connect to those printer via network neighborhood, it...

Hi All: We are running out IP addresses, our subnet is 255.255.255.0 which means it can give 254 hosts, can we some how expand the number of hosts available quickly without change everyone's static IP setting and without using DHCP ? Thanks XM

Hi All: We upgraded to Windows server 2003 domain earlier this year, we are still in mixed mode, still have a few NT BDC lay around, we were able to do most of the task as in the old NT days and more , but as for people 's right to dial in using remote access service, we still have to do it...

Hi All: We just setup Exchange 2000 server and OWA that came with it, it works great however, we dont want everyone with a mail box to use the OWA feature, is there a quick and easy way we can setup this and able to change back to allow everything to do OWA, once we have better server resource...

Hi All: I am curious about our server up time, so I went in to the task manager under the "System Idle Process" it shows numbers of hours in the CPU time, however, that number isn't right, for some server I rebooted about 10 minutes ago, it already showing it has a idle time of a few hours, is...

we have a network drive, its root level have folders ... A,B,C, ..... under A, B, C we want people to be able to add/delete/save files and folders but not directly in the same level as A, B, C I have root level (same level as A, B, C) ------ read for domain user, full for admin inside of...

Hi All: We are runnning Exchange 2000 sp3, and Active Directory is in a Mixed mode (Prmary is running Win2k# AD, one NT BDC and one other Win2K DC on the remote site) we been having this problem updating Exchange Contact (no mail box, just email alias), and what ever change we do it does not...

Hi All: IS there any document that explain how to turn on Transport Layer Security (TLS) encryption in Exchange 2000 server ? how can we safely do this without killing other email activities not requiring this security feature ? Thanks XM

Hi All: Can Windows NT server communicate with client using IPSec ? and can it do a site-to-site VPN ? say some one using a Cisco PIX using IPSec/P2TP and wanting to talk to the NT server VPN box, can it be done ? Thanks XM

Hi : anybody know if there is any 3rd party utility will stop user from exporting sensitive data off the network ? for example before a person quit in the company he or she may copy stuff onto a disk (USB pen or CD RW drive is a killer these days), of course we will try to limit people use of...

Hi All: We are thinking about putting Exchange data file onto a SAN which the storage will be separated from the server itself, is it better to setup like that anyway ? Also we need to setup replication and fail over between two sites , the SAN vendor can offer replication software to snapshot...

Hi All: We are thinking about putting Oracle data file onto a SAN which the storage will be separated from the server itself, is it better to setup like that anyway ? Also we need to setup replication and fail over between two sites , the SAN vendor can offer replication software to snapshot or...

Hi All: We upgraded and migrated from Exchange 5.5 to 2000 about 4 months ago, since then we are not able to download the offline address book, wer are using Exchange 2000 Ent sp3, and outlook 2000 given error in the sync log: 15:59:16 Synchronizing Mailbox 'Zoe Jon' 15:59:16 Done 15:59:17...

Hi All: We are using the native Microsoft VPN client to dial into the RAS server, most of the time is working good, people using it to get to their outlook, file (slow depending on the connection speed) and other stuff lately I have been getting complains about the VPN not working right when...

Hi All: Is there any third party utility (or just even within the full version of Adobe Acrobat) that can disable user from downloading it (lets say we put the PDF file on a web page), so manager want to put some financial stuff on it I know there is a lock function to prevent printing or put...

Hi All: Is there any file reside in the System32 or some folder that enable us to determine when the Windows OS is installed ? (for NT/2000/XP if possible) Thanks XM