I've been setting up a webhook from Marketo to our company and everything worked fine from sandbox when I enabled the access from Marketo IP as is written on Whitelist Page
But from production environment it allways fails with message "couldn't connect to host".
I logged the traffic and discovered that there is IP address range missing in that article 98.129.93.0 / 24 ? or something of that kind.
Nothing happened after adding a comment into article, so I try this discussion.