11-05-2008
Quote:
Originally Posted by
Perderabo
After I telnet somewhere I can do this:
$ tty
/dev/pts/4
$
/dev/pts/4 is a pty (pseudo-terminal) and telnetd must allocate one for a connection and the script program uses them too. You are out mostly due to 192.168.57.42 not properly closing connections. CLOSE_WAIT means a process on your end has closed a socket and now you waiting for a close from the other end. The other end is probably a PC that just reboots or powers off rather than closing a connection. You can probably tune your kernel to time-out the CLOSE_WAIT's but I don't know the specific for your kernel.
First of all , i am not a Unix expert. the logs posted here was sent to me from the Unix admin.
all i wana know is there any direct proof ( assurance ) that the Passive FTP connection coming from the x.x.57.42 is the reason for not accepting the Telent session.s or there might be other scenarios such as:
there wasother telenet sessions already established, however the netstat log was manuiplated before sending it, hence it is not showing here.
or -
There was any configuration change on unix kernal ( e.g chaning the number of acceptable telenet sessions temporerally, hence no tty lines will be available ) that is why the message shows that no lines available
if you can help me out in this i would really appreciate. i am investigating this issue very seriouslly , and i wana have clear evidence for this .
Appreciating
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LEARN ABOUT SUSE
ftpconfig
ftpconfig(1M) System Administration Commands ftpconfig(1M)
NAME
ftpconfig - set up anonymous FTP
SYNOPSIS
ftpconfig [ftpdir]
ftpconfig -d ftpdir
DESCRIPTION
The ftpconfig script is executed by the super user to set up anonymous FTP. Anonymous FTP allows users to remotely log on to the FTP server
by specifying the user name ftp or anonymous and the user's email address as password. The anonymous users are logged on to the FTP
Server and given access to a restricted file area with its own file system root. See chroot(2). The FTP area has its own minimal system
files.
This command will copy and set up all the components needed to operate an anonymous FTP server, including creating the ftp user account,
creating device nodes, copying /usr/lib files, and copying timezone data. The passwd and group files set up have been stripped down to
prevent malicious users from finding login names on the server. The anonymous file area will be placed under ftpdir. If the ftp user
account already exists, then the current FTP area is used, and the system files in it are updated. All other files are left untouched. This
command should be run to update the anonymous FTP area's configuration whenever a system patch is installed, or the system is upgraded.
OPTIONS
-d Create a new or update an existing ftpdir without creating or updating the ftp user account. Use this option when creating guest
FTP user accounts.
OPERANDS
The following operands are supported:
ftpdir The absolute pathname of the directory under which the anonymous FTP area is set up.
EXIT STATUS
The following exit values are returned:
0 Successful completion
1 Improper usage of the command
2 Command failed
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWftpu |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO
ftpaddhost(1M), in.ftpd(1M), useradd(1M), chroot(2), attributes(5)
SunOS 5.10 1 May 2003 ftpconfig(1M)