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Cisco UC320w Ghost calls how to block/avoid them?

dansche
Level 1
Level 1

Hi, I still have a UC320w which works fine for me and has everything needed, I know that this thing is not anymore on sale nor supported. Since a few weeks i allways get ghost calls from various numbers, 500 and 1006, mostly during the night but as well during the day.

 

I searched the web quite a bit and the only thing i found out was to disable IP calling. I tried on the web of my SPA525 with newest firmware, but it‘s greyed out on the website so i can‘t make any change.

 

The UC is connecte direct to the SP, DHCP is made by another device. So my phones have a 10.x.x.x IP Adress and the UC320 GUI has a 192.168.x.x adress.

 

everything worked very well until now.

 

please help

 

thanks

1 Reply 1

toddbruner
Level 1
Level 1

What you are experiencing are scans by people looking for open/insecure SIP systems.  Google "sipvicious".  Went through this myself for a while and it is quite annoying.   Only fix available is to place a firewall in front of your UC320W.