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Several attempts on our firewall on port 113? Is this needed?

Posted on 2008-10-30
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Last Modified: 2013-11-16
I have noticed several connections from external IP addresses attempting to connect to our firewall's main Ip address on port 113. They are all being blocked, but I am wondering what these connections are and why are they being attempted?

Can someone help me with this?
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Question by:nichiaiinc
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dpk_wal earned 500 total points
ID: 22856804
Port 113 is used for Authentication Service / Identification Protocol; as the connections are blocked and you do not have any open service you need not bother. If you wish, you can put the IP under blocked site or the port under blocked ports; also you might wish to contact your ISP and blacklist the sender completely.

Thank you.
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by:nichiaiinc
ID: 22860317
thanks again for answering another one of my questions DPK WAL. Is there any possibility that these connections could be legitimate and I should be allowing them through?
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by:dpk_wal
dpk_wal earned 500 total points
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If you are not hosting any service which needs the incoming session then they cannot be legitimate; if the application needs incoming connection which are part of the session then they would be allowed by the firewall [but not on a different port].

Are you running in any problem where some of the auth service not working properly; if none then I do not think that the connections are legitimate.

Thank you.
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by:dpk_wal
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You are welcome; happy I could be of assistance! :)
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by:nichiaiinc
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thanks DPK WAL!
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by:nichiaiinc
ID: 31511607
Perfect!
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Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

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