1. Can someone help me in designing the internet network.

I have the following equipments
1. Cisco Pix  Firewall 525 with (3) three interface
2. IDS 4220
3. Sun Cobalt - for DNS
4. AS500 with 120 lines (four (4) E1's)
5. Radius Cisco Secure running on Windows 2000
6. 2511 with 16 lines
7. TACACS running on Sun Solaris
8. Web Server running on Windows 2000
9. SQL Server - ASP
10. Exchange 2000/Sendmail
11. Two (2) IBM AS/400 with 11 remote sites (ADSL WAN network with private
Ips)

2. I have two full C class IP address and I am using NAT for local users  -
the problem is I cannot monitor the users with "IP accounting command"  Is
there any solution to know which user is using full bandwidth ?

3. Shall I go for Microsoft Exchange 2000 or shall I use Sun Cobalt built-in
email system "Sendmail". My users need to access their email thru web
browser. My current email is sendmail on sun solaris due to hardware
limitation I need to move to new system.


4. Is it a good idea to have two separate authentication system for Dialup
users. I have two access routers, and Radius Cisco secure for windows &
tacacs  on Sun Solaris. One as standby access router.

5. I have two (2) ADSL links of 1MB uplink and 2 MB downlink each, at
present I am using only one links and the other link is standby if the
primary link fail, then I have to manual remove the primary cable and plug
the secondary cable. The two ADSL routers are 800 series. Can someone give
me a solution, I need to utilizes both the links. My ISP is telling me it's
not possible. What are the advantages & disadvantages of ADSL technology and
lease line.

6. Is it safe to have ADSL WAN Network ?


thanks

ashok braganza




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