nanog mailing list archives

Re: Frontier: Blocking port 22 because of illegal files?


From: "Aaron C. de Bruyn" <aaron () heyaaron com>
Date: Thu, 26 Mar 2015 12:55:43 -0700

Someone with Frontier contacted me off-list and assured me they don't
block port 22, and that it could have been related to port scans,
infected PCs, etc...  They are looking in to it.

Apologies for the noise and for being a prat.  ;)

-A

On Wed, Mar 25, 2015 at 7:31 PM, Aaron C. de Bruyn <aaron () heyaaron com> wrote:
I've had a handful of clients contact me over the last week with
trouble using SCP (usually WinSCP) to manage their website content on
my servers.  Either they get timeout messages from WinSCP or a message
saying they should switch to SFTP.

After getting a few helpful users on the phone to run some quick
tests, we found port 22 was blocked.

When my customers contacted Frontier, they were told that port 22 was
blocked because it is used to transfer illegal files.

I called them, and got the same ridiculous excuse.

Just a friendly heads-up to anyone from Frontier who might be
listening, I have a few additional ports you may wish to block:

80 - Allows users to use Google to search for illegal files
443 - Allows users to use Google to search for illegal files in a secure manner
69 - Allows users to trivially transfer illegal files
3389 - Allows users to connect to unlicensed Windows machines
179 - Allows users to exchange routes to illegal file shares
53 - Allows people to look up illegal names

-A


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