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Protocol violation detected with protocol:, matched protocol sig_id:(1), violation sig_id:(9). (500)

Hello

sometimes we are seeing this issue. and we can not remote site phone, we can not call it.

do you have any idea about that?

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Admin
Admin

Re: Protocol violation detected with protocol:, matched protocol sig_id:(1), violation sig_id:(9). (

What does the rule accepting the traffic look like?
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