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Additional Address on external interface of UTM stopped responding

TrotterD

Hello, hope you are well.

Today, a customer raised an incident that Outlook Web Access was not working. After investigating the problem, I found that the IP Address used for publishing the service was not responding.

This IP Address is an "Additional Address" of the external primary address on the Interface.

To resolve the problem, I had to switch off the "Additional Address" and then switch it back on.


No doubt I am going to by asked to contribute to an incident report and be requested to investigate what the root cause was. Since I have no alerts about the issue, where could I look for any clue about why it stopped working and also has anybody else had a similar problem.

Thanks in advance

Dave



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  • 0

    hi Dave,

    this problem exists over a long time and i never could solve it. after a few minutes with no outgoing traffic the additional ip´s can´t be reached anymore until you switch the interface off/on. or you can send a ping from the server outside then it works again for about 10mins. the strange thing is that not all ip´s affected only server which are generating over a longer time no outside traffic. the only workaround i found is to send a continous ping for e.g. to 8.8.8.8 from all servers to keep the ip´s alive.

    best oliver

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  • 0

    hi Dave,

    this problem exists over a long time and i never could solve it. after a few minutes with no outgoing traffic the additional ip´s can´t be reached anymore until you switch the interface off/on. or you can send a ping from the server outside then it works again for about 10mins. the strange thing is that not all ip´s affected only server which are generating over a longer time no outside traffic. the only workaround i found is to send a continous ping for e.g. to 8.8.8.8 from all servers to keep the ip´s alive.

    best oliver

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