What special characters are allowed in passwords?

All passwords allow basic alphanumeric characters, plus the following special characters (by password type).

SNMP
` ~ ! @ # $ % ^ & * ( ) - _ + = { } | [ ] : < > . ,

SSH
` ~ ! @ # $ % ^ & * ( ) - _ + = { } | [ ] : < > . , ; \

WMI
` ~ ! @ # $ % ^ & * ( ) - _ + = { } | [ ] : < > . ? ;