Most of this information can be found on microsoft's excellent knowledgebase pages (IF not part of well known services -> check /etc/services on most unix systes)
If in doubt, best to see what ASA is blocking, enable logging to buffer on informational level:
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logging time
logging buffer-size 1040000
logging buffere info
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Following this you can do:
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show logg | i Deny
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or
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show logg | i $IP.ADD.RE.SS
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To see what is being denied :]
