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FTP still open after disabling port 21 forwarding...

Last response: in Networking
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Anonymous
July 7, 2004 10:56:11 PM

Archived from groups: microsoft.public.broadbandnet.hardware (More info?)

Scenario:
I have a MN-500 router, firmware: V1.11.017. I noticed
my FTP logs on my server were being updated. Upon
further investigation, I noticed external IPs were
accessing my FTP server and trying to logon (anoymnous is
disabled, of course). This is alarming because I am NOT
forwarding FTP traffic to my server. I only open FTP up
when I need to FTP something to myself or let friends
connect. To make sure I wasn't crazy, I completely
removed port 21 from my base station's port forwarding
configuration and made sure the change was applied by
logging out and back in. Port 21 is not referenced
anywhere now in my base station management tool. After
that, I ran a scan.sygate.com port scan and it is still
reporting 21 as OPEN. Yikes!

Question:
Anyone experience this before? For example, you disabled
or completely removed a port from the router's forwarding
configuration, but you still are able to connect to that
port?
Anonymous
July 7, 2004 11:25:59 PM

Archived from groups: microsoft.public.broadbandnet.hardware (More info?)

UPDATE: I resolved the issue by unplugging the router,
waiting a few seconds and then plugging it back in. Ran
a port scan and now it reports 21 as BLOCKED.

I'm stll curious to know if someone else has experienced
this kind of behavior. Thanks!


>-----Original Message-----
>Scenario:
>I have a MN-500 router, firmware: V1.11.017. I noticed
>my FTP logs on my server were being updated. Upon
>further investigation, I noticed external IPs were
>accessing my FTP server and trying to logon (anoymnous
is
>disabled, of course). This is alarming because I am NOT
>forwarding FTP traffic to my server. I only open FTP up
>when I need to FTP something to myself or let friends
>connect. To make sure I wasn't crazy, I completely
>removed port 21 from my base station's port forwarding
>configuration and made sure the change was applied by
>logging out and back in. Port 21 is not referenced
>anywhere now in my base station management tool. After
>that, I ran a scan.sygate.com port scan and it is still
>reporting 21 as OPEN. Yikes!
>
>Question:
>Anyone experience this before? For example, you
disabled
>or completely removed a port from the router's
forwarding
>configuration, but you still are able to connect to that
>port?
>
>.
>
!