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Old 07-26-2010, 10:42 AM   #1
konzo
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Registered: Dec 2008
Location: Bulgaria
Distribution: Debian / Slackware / Ubuntu
Posts: 230

Rep: Reputation: 33
Check if ftp is installed


I found that I have several services running related to ftp

Code:
cat /etc/services | grep ftp
ftp-data        20/tcp
ftp             21/tcp
tftp            69/udp
sftp            115/tcp
ftps-data       989/tcp                         # FTP over SSL (data)
ftps            990/tcp
venus-se        2431/udp                        # udp sftp side effect
codasrv-se      2433/udp                        # udp sftp side effect
frox            2121/tcp                        # frox: caching ftp proxy
zope-ftp        8021/tcp                        # zope management by ftp
Is that mean that I have ftp installed on my system?
 
Old 07-26-2010, 10:52 AM   #2
forrestt
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Registered: Mar 2004
Location: Cary, NC, USA
Distribution: Fedora, Kubuntu, RedHat, CentOS, SuSe
Posts: 1,288

Rep: Reputation: 99
The /etc/services file is used to tell what ports are standard for a given service. It does not mean that they are installed. If you look at the file, you can see that ftp data is transferred on port 21 using TCP and that port 21 is the standard ftp port and also uses TCP. It is a tool that client and servers can use to determine what ports to open for a connection. It is also a reference for administration purposes to know what service goes w/ what ports.

HTH

Forrest
 
Old 07-26-2010, 10:52 AM   #3
sem007
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Registered: Nov 2006
Distribution: RHEL, CentOS, Debian Lenny, Ubuntu
Posts: 638

Rep: Reputation: 113Reputation: 113
/etc/services file contain service port number and protocol.

if you want to view running service use nmap or netstat command

Code:
netstat -antlp | grep ftp
tcp        0      0 0.0.0.0:21              0.0.0.0:*               LISTEN      26142/vsftpd
Code:
nmap localhost or IPADDRESS

Starting Nmap 4.62 ( http://nmap.org ) at 2010-07-18 13:12 PDT
Interesting ports on localhost (127.0.0.1):
Not shown: 1705 closed ports
PORT     STATE SERVICE
21/tcp   open  ftp
22/tcp   open  ssh
25/tcp   open  smtp
80/tcp   open  http
......
.....
....
 
  


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