3starsnet : phone security issue

Vous avez aussi recu ce mail de 3stars ? (j'ai une BBox1)
Dear Customer,
Our preventive security scan service has picked up technical security issues
with your voip-account.
It seems your phone system is not guarded against unauthorised access/use by
your staff, or even external hacking.
Most commonly this is due to your system's non-compliance to our security
requirements, which is also a breach of your contractual obligations.
We suggest you urgently check and secure your systems, or contact your IT
service provider:
Your sip device is open on the public internet network.
We strongly suggest to review your firewall to isolate your voip equipment.
Your ip address : XXX.XXX.XXX.XXX
Your Customer ID : XXXX
Your VoIP device : BBOX6726_v0.89.72_J904023116
| SIP Device | User Agent | Fingerprint |
-------------------------------------------------------------------
| XXX.XXX.XXX.XXX:5060 | BBOX6726_v0.89.72_J904023116 | disabled |
https://www.mynetfone.com.au/support/Se ... rnetSecuri
ty
http://blogs.digium.com/2009/03/28/sip-security/
More general information can be found on our security advice page on the website
:
This is an automated message. Please urgently contact your own IT Service
Provider.
Team 3 StarsNet.