By the way, what I've found in the TA log is the following (the Proxy and the Firewall/-s have been checked previously):
2020-03-25 15:44:05,549 ERROR pid=18531 tid=MainThread file=splunk_ta_snow_accou nt_validation.py:validate:66 | Unable to reach ServiceNow instance at https://.service-now.com/. The reason for failure is=Traceback (most recent call la st):
File "/opt/splunk/etc/apps/Splunk_TA_snow/bin/Splunk_TA_snow/httplib2_helper/h ttplib2_py3/httplib2/init.py", line 1529, in conn_request
conn.connect()
File "/opt/splunk/etc/apps/Splunk_TA_snow/bin/Splunk_TA_snow/httplib2_helper/h ttplib2_py3/httplib2/init_.py", line 1291, in connect
address_info = socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM)
File "/opt/splunk/lib/python3.7/socket.py", line 748, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/opt/splunk/etc/apps/Splunk_TA_snow/bin/splunk_ta_snow_account_validatio n.py", line 62, in validate
resp, content = http.request(url)
File "/opt/splunk/etc/apps/Splunk_TA_snow/bin/Splunk_TA_snow/httplib2_helper/h ttplib2_py3/httplib2/init.py", line 1958, in request
cachekey,
File "/opt/splunk/etc/apps/Splunk_TA_snow/bin/Splunk_TA_snow/httplib2_helper/h ttplib2_py3/httplib2/init.py", line 1623, in request
conn, request_uri, method, body, headers
File "/opt/splunk/etc/apps/Splunk_TA_snow/bin/Splunk_TA_snow/httplib2_helper/h ttplib2_py3/httplib2/init_.py", line 1536, in _conn_request
raise ServerNotFoundError("Unable to find the server at %s" % conn.host)
httplib2.ServerNotFoundError: Unable to find the server at .service-now.c om
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