Netezza default ports

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Port number 5480    
nzsql, postgres,   NzAdmin tools and for ODBC & JDBC connections   
Port number 5481    
CLI and NzAdmin   tool messaging connections   
Port number 5483    
nzbackup and   nzrestore commands   
Port number 5482    
NzLoad in NPS version 3.1 and lower. For NPS   versions higher than 3.1, (no longer used)   

Netezza uses ssh port 22 for Netezza support team to remotely connect to your server to work on issues. Most large corporations dont open this port up based on their security to policy. Also, for IBM to have ftp access to your box to copy Netezza logs, etc (while working on PMR’s) you have to open ftp port 20 & 21.