how to fix network problem

hi guys

i have a windows enviroment in office and from past couple of days i am expereincing so old events

slow internet connection
slow delivery in emails
also when i connect through cisco client the connection (RDP) to servers drop every 10 to 20 seconds and then get reconnected  but my VPN client stay connected
i can SSH on to my pix on public IP  and does feel any disconnection

any suggestion as what to check ?
ammartahir1978Asked:
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mredfelixConnect With a Mentor Commented:
well something is taking up your bandwith. I would test it va taking all the client machines off the network and seeing if you can connect to the server. Unless your cisco commands are good and you can sit on the pix and see which ip is sending and recieving alot of data.

http://www.computernetworkinghelp.com/content/view/40/1/

if its your server then we can look at that but sounds like a spyware etc on a client machine.
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mredfelixCommented:
can you disconnect your server from the windows domain by unpluging the network cable and try connecting that will rule out if its traffic going through in correct configered pix ( Cisco) or if it is an internal machine.
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ammartahir1978Author Commented:
well i can connect to all the servers remotely but it disconnect me and the reconnect me remotely
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ammartahir1978Author Commented:
also we didnt made any changes to pix and these servers were absolutely fine couple of days back
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proeliumConnect With a Mentor Commented:
Try running wireshark on one of you workstations and see what data is being sent around by your internal network. This should allow you to track what machine in particular is using up your bandwith if it is an internal network problem.

http://www.wireshark.org/download.html
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