I seem to be getting DNS errors trying to connect to PSN this morning. Otherwise internet seems fine from my other devices.
PSN network status site shows everything is up though
https://status.playstation.com/en-us/_?smcid=web_pdc:status:support-subnav
Edit Update 1:
The PSN network status page now shows this "error"
Affected Platforms:
PS3™
Affected Services:
You may have some difficulty accessing features and products on the PlayStation®Store. Our engineers are working to resolve the issue as soon as possible, and we thank you for your patience.
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From what I'm reading there was a large scale cyber attack on the servers that control DNS for a bunch of online companies Sony being one of them