RE: [cobalt-users] Anyone know where to get nmap for RAQ2 -

["Schachter, Abe" <ans@xxxxxxxx>]

Actually, active (i.e. traditional) FTP uses port 21 for control and
commands and port 20 for data transfer.  Passive FTP  uses port 21 for
control and commands and a random port (where port# > 1024) for data
transfer.  

If you are supporting regular FTP you need to have both ports 20 & 21 open.
If not, users will be able to connect and issue commands, such as directory
listings or file upload/download initiation, but no data will actually be
transferred (i.e. no results from the commands and no files transferred).

Abe

"If you think technology can solve your security problems,
then you don't understand the problems and you don't
understand the technology." 
-Bruce Schneier, Secrets and Lies



-----Original Message-----
From: Peter Masloch [mailto:peter@xxxxxxxxxxx]
Sent: Friday, June 07, 2002 1:36 PM
To: cobalt-users@xxxxxxxxxxxxxxx
Subject: RE: [cobalt-users] Anyone know where to get nmap for RAQ2 -


21 = FTP (there is only one)
22 = SSH
23 = Telnet 

>I believe one is for client one is for server (21 server, 22 
>client).  and 23 is telnet.
>
>-----Original Message-----
>From: Paul Alcock [mailto:webmgr@xxxxxxxxxxxxxxxxxx]
>Sent: Friday, June 07, 2002 11:17 AM
>To: cobalt-users@xxxxxxxxxxxxxxx
>Subject: RE: [cobalt-users] Anyone know where to get nmap for RAQ2 -
>
>
>> On Friday 07 June 2002 11:48 am, Paul Alcock wrote:
>> 
>> > Thanks all, got nmap installed on my 2nd RAQ2.
>> > The compile and install routine worked fine, a few errors 
>that mean 
>> > it won't run in a gui (it notes that guis are for wimps!)
>> >
>> > Did a scan and here's the meat of the response, see 
>anything wrong? 
>> > (used nmap -v -sS -O mymachineipaddress)
>> >
>> > Adding open port 81/tcp	ADM
>> > Adding open port 21/tcp	FTP
>> > Adding open port 53/tcp	NAMED
>> > Adding open port 443/tcp	SSL HTTP	
>> > Adding open port 444/tcp	SSL ADM
>> > Adding open port 143/tcp	IMAP
>> > Adding open port 25/tcp	SMTP
>> > Adding open port 80/tcp	HTTP
>> > Adding open port 110/tcp	POP3
>> > Adding open port 22/tcp	FTP
>> >
>> > Should any of thost ports be closed?
>> >
>> 
>> For maximum security, close them all ;-))
>> looks good, as long as you are using those services.
>> 
>> --
>> Gerald Waugh 
>Thanks Gerald, ok, I'll close them all (LOL)
>But seriously, is there a reason for both 21 and 22 for ftp?
>
>Paul.
>
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