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I recently set up a new server in a datacenter. We had a Kerio Mailserver running at another datacenter so I copied configs, stopped the other server and activated the new one.

After setting up Firewall policies on the DMZ, all looks good for the most part. All the mail ports and mailboxes are sending/recieveing emails. But what I am noticing is that in the ACTIVE CONNECTIONS window, i see a number of, 4-5, "odd' smtp connections. They are odd to me because the IP scheme is totally off as compared to the normal IP's that connect(if that make sense) and looks like maybe spammer/hacker are trying to exploit the server. I was watching the ACTIVE CONNECTIONS window and I saw one of our users logged in but again, from a really odd 35.X.X.X ip and another 1ith q 59.X.X.X IP address. That really concerned me.

Am I being a nervous nelly or should be concerned? Can i find out another way? Any tips would be appreciated.


[Updated on: Sat, 16 February 2008 17:16]


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You could see where those IP are located or to whom their registered to. For example here:

Perhaps that can help you trace those IP's...

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It's also possible that these connections are just SMTP monitoring by your new data center. They may employ an in-house monitor AND an external monitor, which would explain why you're seeing connections from IPs on two different subnets.

DNS lookup of the IPs will probably help you figure this out -- if the domain name is the same as that of your data center, then that's probably what's going on. Check with the data center's support staff to make sure.

[Updated on: Tue, 19 February 2008 18:17]

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