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SSL Certificate Lookup

Splunk AppInspect Passed
Admins: Please read about Splunk Enterprise 8.0 and the Python 2.7 end-of-life changes and impact on apps and upgradeshere.
Provides sslcert_lookup, an external lookup that when given an IP/domain and optionally port, finds values from SSL cert like CN and expiration. This can be handy for several use cases like looking for certificate expiration or discovering what site may be at an IP address.


This supporting add-on provides an external lookup called sslcert_lookup to collect the attributes of an SSL cert at a given address and port. It is built on the Splunk SDK.

Version: 1.0.0

Lookup reference:



Given the input of a domain or ip address and optionally a connecting port (defaults to https 443 port if not specified), the sslcert_lookup returns various attributes of an SSL certificate.


search * | lookup sslcert_lookup dest AS <search_field_with_domain_or_ip> [dest_port AS <search_field_with_port>] [OUTPUT <specfic_field_list>]

Required arguments

dest field from search
Syntax: * | lookup sslcert_lookup dest AS <search_field_with_domain_or_ip>
Description: Specify a field with a domain or ip address value.

Optional arguments

dest_port field from search
Syntax: * | lookup sslcert_lookup dest AS <search_field_with_domain_or_ip> dest_port AS <search_field_with_port>
Description: Specify a field with a port to connect to.
Default: 443

sslcert macro


Simple method for running the sslcert_lookup.


search * | `sslcert(<search_field_with_domain_or_ip> [, <search_field_with_port>])`

Required arguments

dest field from search
Syntax: * | `sslcert(<search_field_with_domain_or_ip>)`
Description: Specify a field with a domain or ip address value.

Optional arguments

dest_port field from search
Syntax: * | `sslcert(<search_field_with_domain_or_ip>, <search_field_with_port>)`
Description: Specify a field with a port to connect to.
Default: 443

Possible Fields Returned



1: Connect to domain

| makeresults | eval dest="splunk.com" | lookup sslcert_lookup dest

2: Connect to domain using macro

| makeresults | eval dest="splunk.com" | `sslcert(dest)`

3: Connect to ip

| makeresults | eval dest="" | lookup sslcert_lookup dest

4: Connect to host and port

| makeresults | eval dest="mysplunkserver", dest_port=8000 | lookup sslcert_lookup dest dest_port

5: Connect to host and port using macro

| makeresults | eval dest="mysplunkserver", dest_port=8000 | `sslcert(dest, dest_port)`

6: Connect to ip and get only CN

| makeresults | eval dest="" | lookup sslcert_lookup dest OUTPUT ssl_subject_common_name

Release Notes

Version 1.0.1
July 8, 2019

App inspect fix


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