Yes, a kind of risk for supporting external SIP phone access but potential hackers still need to get the user's login code correct and they only have 5 go's before the extension number is blacklisted for 10 minutes (and if they keep trying another 5 go's blacklists the IP address for 10 minutes)
[I know having been there recently with a bit of SIP softphone software that was automatically retrying the registration details when I got the login wrong and so got itself blacklisted within seconds. Lots of hair pulling before I spotted the software was doing that and got to shout at the developer]
That's said, the existing H.323 behaviour of having an extension registration passcode that is separate from the phone user login code is coming to SIP extensions as part of R11.0. That means the passcode used for intial registration of an extension can then be something really long and annoying to installers and hackers alike.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.