Sluggers,
This was on the pen-test list. Anyone here ever see this effect or have an
idea what is involved with this effect? (it's on linux) Tnx, Bob
> -----Original Message-----
> From: Beaty, Bryan [mailto:Bryan.Beaty@vector.com]
> Sent: Sunday, December 07, 2003 6:21 PM
> To: pen-test@securityfocus.com
> Subject: Service Identification
>
>
> I port scanned a box I am working on. I know the box is some form of
Linux.
> I see that port 23,25 and 53 are open. I can identify 53 as DNS. Both NMAP
> and AMAP identify it as DNS.
>
> Port 23 and 25 are open but cannot be identified by AMAP or NMAP. When I
> telnet <ip> 23 or 25 I get a blank screen. If I type I just get blank
spaces
> or underscore symbols on the screen.
>
> Does this mean the telnet and SMTP server have crashed?
> Could it be that someone has installed some other service on these ports?
> How do you identify services that respond like this? Seems like I run into
> this from time to time but I never have learned how to deal with it.
>
> Any ideas what to do at this point? I do not have physical access to the
> box.
>
> Thanks,
> Bryan Beaty
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