I have a MacPro running OS 10.6.8 and Norton Internet Security 2011. I recently connected a HP Designjet 800 printer. Short of it is, works with firewall/internet OFF. But not with it ON. Have gone through the ringer, here is what I found so far. Do I use "assist" and specify local computer for "Allow" connections or just a general "allow"? Do not want to activate unnecessary ports either. Occasionally I get prompts such as: 'usr/ sbin. smbd" asking to "allow".
With Norton Firewall & Internet ON:
In "Network Utility/ Port Scan"
Port Scanning host: 192.168.1.xxx [ethernet port on computer]: Port Scan has started…
Open TCP Port: 88 kerberos [Kerberos]
Open TCP Port: 139 netbios-ssn
Open TCP Port: 445 microsoft-ds [Common Internet File System (CIFS)]
Open TCP Port: 631 ipp [Printer Sharing]
Open TCP Port: 8080 http-alt [printing agent HP LaserJet?]
Port Scanning host: 192.0.0.xx [HP Designjet 800 IP]: Port Scan has started…
nothing......
With Norton Firewall & Internet OFF:
Port Scanning host: 192.0.0.xxx [HP Designjet 800 IP]: Port Scan has started…
Open TCP Port: 21 ftp [File Transfer Protocol (FTP)]
Open TCP Port: 23 telnet [Remote Login (Telnet)]
Open TCP Port: 80 http [Web Sharing]
Open TCP Port: 280 http-mgmt [HTTP Management]
Open TCP Port: 515 printer [Line Printer (LPR)]
Open TCP Port: 631 ipp [Printer Sharing]
Open TCP Port: 5120
Open TCP Port: 5121
Open TCP Port: 5122
Open TCP Port: 9100 hp-pdl-datastr [JetDirect]
Port Scanning host: 192.168.1.xxx [ethernet port on computer]: Port Scan has started…
Open TCP Port: 88 kerberos [Kerberos]
Open TCP Port: 139 netbios-ssn
Open TCP Port: 445 microsoft-ds [Common Internet File System (CIFS)]
Open TCP Port: 631 ipp [Printer Sharing]
Open TCP Port: 8080 http-alt [printing agent HP LaserJet?]
With Norton Firewall & Internet , Printer OFF: nothing either IP address
With Norton Firewall & Internet ON, Printer OFF: nothing either IP address