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ViktarBachkouski-1311 avatar image
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ViktarBachkouski-1311 asked ViktarBachkouski-1311 commented

An error occurred while trying to communicate with an external SFB user.

Hi!

An error occurred while trying to communicate with an external SFB user. I can't always make a call and can't add multiple participants to a conversation. In Event log on Edge Server we're have next error:

The following discovered partners are sending frequent invalid SIP requests to the Access Edge Server.

Traffic from these partners is restricted to 1 message per second as a security measure.

Certificate Subject: "subject 1"; Issuer: "US, DigiCert Inc, www.digicert.com, GeoTrust RSA CA 2018"; Serial Number: 0D59; Common Failures: OTHER(430,OTHER)=1 OTHER(4xx,OTHER)=1

Certificate Subject: "subject 2"; Issuer: "PL, Unizeto Technologies S.A., Certum Certification Authority, Certum Domain Validation CA SHA2"; Serial Number: 5D1B1; Common Failures: SUBSCRIBE(4xx,OTHER)=79

Certificate Subject: "subject 3"; Issuer: "US, Arizona, Scottsdale, "GoDaddy.com, Inc.", http://certs.godaddy.com/repository/, Go Daddy Secure Certificate Authority - G2"; Serial Number: 0097; Common Failures: SUBSCRIBE(4xx,OTHER)=23

Cause: Federated partners that were discovered through DNS SRV are sending frequent SIP requests that cause an error response from the local Skype for Business Server deployment.

Resolution: It is recommended that connections from these partners be blocked at the firewall.


We do not know if the events are related to this error. But they happened about the same time. Any help?

Best Regards,
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office-skype-business-server-conferencingoffice-online-server-sfb
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Hi @ViktarBachkouski-1311
According to your description, this question seems to be related to Skype for business, so I would add a tag of Skype for business and move the tag of office-online-server-sfb.

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@ViktarBachkouski-1311,
Is there any update on this case?
Please feel free to drop us a note if there is any update.
Have a nice day!

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@ViktarBachkouski-1311,
If you have any questions or needed further help on this issue, please feel free to post back.

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1 Answer

SharonZhao-MSFT avatar image
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SharonZhao-MSFT answered ViktarBachkouski-1311 commented

@ViktarBachkouski-1311,

Do you mean that you can only start peer-to peer IM with external user?

Does this issue happen on other external users, including different external organizations?

Please try to add issues partners’ Edge FQDN to the “SIP Federated Domains” using Skype for Business control panel with “Allow” flag.
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I'm not sure, I can't check this now. But, I accept this answer.

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