Hi Igor,
"Symantec Agent" website is created on SMP with 4726 port:
SMP server is added on Gateway and communication betwwen them occurs:
Logs from CEM Agent:
<event date='01/21/2019 22:41:33.4070000 +01:00' severity='4' hostName='MASZYNA' source='ConfigServer' module='AeXNSAgent.exe' process='AeXNSAgent.exe' pid='6440' thread='27272' tickCount='356122671' >
<![CDATA[Configure Server Mode: No previous server key is found or server was changed, will reinitialize machine GUID]]>
</event>
<event date='01/21/2019 22:41:33.4690000 +01:00' severity='4' hostName='MASZYNA' source='ConfigServer' module='AeXNSAgent.exe' process='AeXNSAgent.exe' pid='6440' thread='27272' tickCount='356122734' >
<![CDATA[Configure Server Mode: Resource keys were changed, will reinitialize machine GUID]]>
</event>
<event date='01/21/2019 22:41:33.4700000 +01:00' severity='4' hostName='MASZYNA' source='ConfigServer' module='AeXNSAgent.exe' process='AeXNSAgent.exe' pid='6440' thread='27272' tickCount='356122734' >
<![CDATA[Configure Server Mode: Initial machine resource GUID is '{00000000-0000-0000-0000-000000000000}']]>
</event>
<event date='01/21/2019 22:41:33.4710000 +01:00' severity='4' hostName='MASZYNA' source='Agent' module='AeXNSAgent.exe' process='AeXNSAgent.exe' pid='6440' thread='27272' tickCount='356122734' >
<![CDATA[Calling NS server endpoint 'HTTPS://cms-smp11.MYCOMPANY:443/altiris/NS/Agent/ConnectionTest.asp', ID: {0D9D9CB4-C19A-4E16-A3CC-98940ED043D0}]]>
</event>
<event date='01/21/2019 22:41:33.5170000 +01:00' severity='1' hostName='MASZYNA' source='CAtrsException' module='client task agent.dll' process='AeXNSAgent.exe' pid='6440' thread='32240' tickCount='356122781' >
<![CDATA[CTAgent::GetAgentStatus(): CAtrsException exception, error: m_taskStatusCollector->GetTaskStatus failed, OS error: Invalid pointer (0x80004003), at line 1521]]>
</event>
<event date='01/21/2019 22:41:33.5550000 +01:00' severity='1' hostName='MASZYNA' source='NetworkOperation' module='AeXNetComms.dll' process='AeXNSAgent.exe' pid='6440' thread='27272' tickCount='356122828' >
<![CDATA[Operation 'Direct: Check URL' failed.
Protocol: HTTPS
Host: cms-smp11.MYCOMPANY:443
Path: /altiris/NS/Agent/ConnectionTest.asp
Connection Id: 16.6440
Communication profile Id: {765AC745-8BAB-4786-A384-D505A9C769AF}
Throttling: 0 0 0
Error type: HTTP error
Error code: HTTP status 400: The server cannot process the request because the syntax is not valid (0x8FA10190)
Error note: 400 Bad Request
Server HTTPS connection info:
Server certificate:
Serial number: 15 e5 f1 <DELETED>
Thumbprint: c4 ce de 78 <DELETED>
Cryptographic protocol: TLS 1.0
Cipher suite: TLS_RSA_WITH_3DES_EDE_CBC_SHA
Cipher algorithm: 3DES
Cipher key length: 168
Hash algorithm: SHA1
Hash length: 160
Key exchange algorithm: RSA
Key length: 2048]]>
</event>
<event date='01/21/2019 22:41:33.5570000 +01:00' severity='2' hostName='MASZYNA' source='ConfigServer' module='AeXNSAgent.exe' process='AeXNSAgent.exe' pid='6440' thread='27272' tickCount='356122828' >
<![CDATA[Request 'HTTPS://cms-smp11.MYCOMPANY:443/altiris/NS/Agent/ConnectionTest.asp' failed, COM error: HTTP status 400: The server cannot process the request because the syntax is not valid (0x8FA10190)]]>
</event>
<event date='01/21/2019 22:41:33.5570000 +01:00' severity='1' hostName='MASZYNA' source='ConfigServer' module='AeXNSAgent.exe' process='AeXNSAgent.exe' pid='6440' thread='27272' tickCount='356122828' >
<![CDATA[Configure Server Mode: Failed to receive server version from 'cms-smp11.MYCOMPANY']]>
</event>
<event date='01/21/2019 22:41:33.5590000 +01:00' severity='2' hostName='MASZYNA' source='Agent' module='AeXNSAgent.exe' process='AeXNSAgent.exe' pid='6440' thread='27272' tickCount='356122828' >
<![CDATA[Failed to register agent. Registration status 'Not registered'. Next retry in 60 min.]]>