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Author Topic: Billion 8800NL port scans  (Read 4068 times)

NewtronStar

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Billion 8800NL port scans
« on: June 10, 2016, 10:16:39 PM »

It has come to my attention that port 16450 on the Billion 8800nl is kind of open for usual probes to take place.

Does anyone know of a way to completely close this port off from any outside probes ?
« Last Edit: June 10, 2016, 10:18:50 PM by NewtronStar »
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NewtronStar

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Re: Billion 8800NL port scans
« Reply #1 on: June 10, 2016, 10:37:53 PM »

Never mind found the application that uses this ports and purged it from the modem
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MartinGoose

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Re: Billion 8800NL port scans
« Reply #2 on: June 11, 2016, 09:13:06 AM »

Care to be a bit more specific to help other Billion 8800NL users?
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NewtronStar

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Re: Billion 8800NL port scans
« Reply #3 on: June 11, 2016, 01:05:32 PM »

what we noticed was port 16450 was not in stealth mode it was closed for something and a bit of digging inside the 8800nl and found it was being used for Skype with 4 rules set up and once removed then that port went into stealth mode.
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burakkucat

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Re: Billion 8800NL port scans
« Reply #4 on: June 11, 2016, 02:48:53 PM »

what we noticed was port 16450 was not in stealth mode it was closed for something and a bit of digging inside the 8800nl and found it was being used for Skype with 4 rules set up and once removed then that port went into stealth mode.

Ah, that is interesting. As I have a copy of the Billion BiPAC 8800NL User Manual (Last revised date: February 27, 2014) I had a quick look through it to see if there was any mention of that particular software port number . . . without success.
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MartinGoose

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Re: Billion 8800NL port scans
« Reply #5 on: June 11, 2016, 05:17:42 PM »

Port 16450 is stealth here so it seems OK.
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NewtronStar

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Re: Billion 8800NL port scans
« Reply #6 on: June 11, 2016, 06:01:33 PM »

Don't know if it was setup by the previous owner I did two hard resets before and after updating the firmware. there is still a virtual servers should it be there  :-\

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gt94sss2

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Re: Billion 8800NL port scans
« Reply #7 on: June 11, 2016, 06:21:04 PM »

Not using a Billion but I have found it's as a result of uPNP.

Skype seems to need a separate port opened for each instance of the software running. I believe the port numbers are random and if you stop Skype, the port forwarding rule for that machine stops.
« Last Edit: June 11, 2016, 06:23:44 PM by gt94sss2 »
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NewtronStar

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Re: Billion 8800NL port scans
« Reply #8 on: June 11, 2016, 06:31:25 PM »

Thank you all have just removed the the two rules as seen on in the pic, and if the next time I use Skype and it fails to communicate with the outside i'll know why.
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