Splunk Secure Gateway connection error

[joshiro]

We are having a connection issue on Splunk Enterprise 8.2.6 on prem with Splunk Secure Gateway 2.7.4, according to the firewall rules the connection port 443 outbound to the host prod.spacebridge.spl.mobi is allowed.

We verified the connection using the troubleshooting guide in the documentation by running:

curl https://prod.spacebridge.spl.mobi/health_check

Also we tried the test for wss connection and we get the correct response:

curl -i -N -H "Connection: Upgrade" -H "Upgrade: websocket" -H "Host: echo.websocket.events" -H "Origin: https://echo.websocket.events" -H "Sec-WebSocket-Key: d3d3LnNwbHVuay5jb20=" -H "Sec-WebSocket-Version: 13" https://echo.websocket.events

When we run the following rest command:

| rest "services/ssg/test_websocket" request_type="{\"versionGetRequest\": {}}" request_mode=clientSingleRequest

We get this output:

auth_code_status = 200
completed_client_registration = 0
error = 'token_id'
server_registration_status = 400
splunk_server = server
wss_response = 0

The error traceback in _internal is:

2022-05-09 11:22:58,148 ERROR [rest_base] [__init__] [exception] [4772] Spacebridge error
Traceback (most recent call last):
  File "/opt/splunk/etc/apps/splunk_secure_gateway/bin/spacebridgeapp/rest/util/helper.py", line 13, in extract_parameter
    result = obj[key]
KeyError: 'self_register'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/opt/splunk/etc/apps/splunk_secure_gateway/bin/spacebridgeapp/rest/base_endpoint.py", line 53, in handle
    res = self.handle_request(request)
  File "/opt/splunk/etc/apps/splunk_secure_gateway/bin/spacebridgeapp/rest/base_endpoint.py", line 86, in handle_request
    return self.post(request)
  File "/opt/splunk/etc/apps/splunk_secure_gateway/bin/spacebridgeapp/rest/registration/saml_registration_handler.py", line 70, in post
    self_register = extract_parameter(request['query'], SELF_REGISTER_LABEL, QUERY_LABEL)
  File "/opt/splunk/etc/apps/splunk_secure_gateway/bin/spacebridgeapp/rest/util/helper.py", line 15, in extract_parameter
    raise Errors.SpacebridgeRestError('Error: Request requires %s parameter "%s"' % (source_name, key), 400)
spacebridgeapp.rest.util.errors.SpacebridgeRestError: Error: Request requires query parameter "self_register"

Any ideas on how to solve this issue? or continue the troubleshooting?