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Users getting "kicked" randomly but around same time almost daily?

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Users getting "kicked" randomly but around same time almost daily?

Netadmin12
Hi, I maintain a small network. consisting of 2 companies sharing 1 ISP line, which goes into a Cisco ASA5505 box and then splits into 2 diffrent Domain Controllers since each has thier own domain...

So the issue is, most users (some XP,some 7 x64) lose thier mapped drives, and get authentication boxes randomaly. but usually around 5:30-6:00pm daily.

A reboot fixes the issue and the internet still works just fine during this time.

The single server, acts as, DC,DNS,AD,Fileserver and the ASA is the DHCP.

I have a feeling it is related to "DNS" but I did not do the initial setup of any of this (only the ASA i installed one year ago) I do beleive this issue is rather new and maybe only after having the ASA is it an issue, but thats not for sure..

SO i am hoping for any help on this situation as it needs to be fixed.. I will get the Event Viewer logs asap and let you know what they say"

off the top of my head from one of the XP client machines around the time it lost its connection said "the scurity system detected an attempted downgrade attack for server xxxdc" but more commen was the "The security system could not establish a secured connection with the server xxxdc, no authentication protocol was available" " and I know there was a few Active directory type machine could not be found, something along those lines..
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    Rob Kuhn

    Is this happening to both companies or just one? The single server that you mentioned, does this service both companies or just one?

    Since you have the ASA setup to also be the DHCP server, I assume this is to service both companies and each are on their own respected scopes?

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    Netadmin12

    TY for your reply... It is happening to just one company.. only rarely to both.. SIngle Server for EACH company (as in 2 servers total)

    now that you mention it, i think they might all have just one scope...i will have to see about that

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    Rob Kuhn

    I've been away for a few days and wanted to see what the status was...

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    Netadmin12

    Hi ROb, I changed the DNS address on the client machines (a few not all) to the point to the server as they were pointing to the "ISP DNS" I am awaiting feedback from the users actually tonight since i let them test it for a few days now. will update asap.. ty for checking in

  • +
    0 Votes
    Rob Kuhn

    Is this happening to both companies or just one? The single server that you mentioned, does this service both companies or just one?

    Since you have the ASA setup to also be the DHCP server, I assume this is to service both companies and each are on their own respected scopes?

    +
    0 Votes
    Netadmin12

    TY for your reply... It is happening to just one company.. only rarely to both.. SIngle Server for EACH company (as in 2 servers total)

    now that you mention it, i think they might all have just one scope...i will have to see about that

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    0 Votes
    Rob Kuhn

    I've been away for a few days and wanted to see what the status was...

    +
    0 Votes
    Netadmin12

    Hi ROb, I changed the DNS address on the client machines (a few not all) to the point to the server as they were pointing to the "ISP DNS" I am awaiting feedback from the users actually tonight since i let them test it for a few days now. will update asap.. ty for checking in