topic Re: How to block Telnet, SSH & FTP access in HP-UX 11 in Operating System - HP-UX

How to block Telnet, SSH & FTP access in HP-UX 11

SomnathChakraborty — Thu, 20 Nov 2008 18:16:36 GMT

Hi,

I want to block Telnet. FTP & ssh access from a particular IP. I don' have /var/adm/initd.sec file in my server. Pl help me out;

Somnath

Re: How to block Telnet, SSH & FTP access in HP-UX 11

Ivan Krastev — Thu, 20 Nov 2008 18:42:10 GMT

For telnet: create /var/adm/inetd.sec - http://docs.hp.com/en/B9106-90011/inetd.sec.4.html

SSH - edit sshd_config and add:
DenyUsers user1, user2 ...

ftp - edit the ftpusers file http://docs.hp.com/en/B9106-90011/ftpusers.4.html

regards,
ivan

Re: How to block Telnet, SSH & FTP access in HP-UX 11

rick jones — Fri, 21 Nov 2008 00:39:38 GMT

I'm not sure if it was available on 11.0 ("HP-UX 11" is a bit vague...) but ipfilter would be one way you could intercept and discard incoming traffic to the well known ports for Telnet, FTP and ssh from a given source IP.

Re: How to block Telnet, SSH & FTP access in HP-UX 11

Johnson Punniyalingam — Fri, 21 Nov 2008 02:09:52 GMT

Hi SomnathChakraborty,

>> I don' have /var/adm/initd.sec file in my server. Pl help me out;
<<

you copy that file from smilar server with same HPUX version.

Than you modify as per your requirement

Thanks,
Johnson

Re: How to block Telnet, SSH & FTP access in HP-UX 11

Suraj K Sankari — Fri, 21 Nov 2008 05:05:28 GMT

Hi,

Put this entry into /var/adm/inetd.sec

ftp deny ipaddress
telnet deny ipaddress

see the below inetd.sec file from one of my server

monitor@testbox[/opt/ssh/etc] > cat /var/adm/inetd.sec
# @(#)B11.23_LRinetd.sec $Revision: 1.10.214.1 $ $Date: 96/10/08 13:20:06 $
#
#
# The lines in the file contain a service name, permission field and
# the Internet addresses or names of the hosts and/or networks
# allowed to use that service in the local machine.
# The form for each entry in this file is:
#
#
#
# For example:
#
# login allow 10.3-5 192.34.56.5 ahost anetwork
#
# The above entry allows the following hosts to attempt to access your system
# using rlogin:
# hosts in subnets 3 through 5 in network 10,
# the host with Internet Address of 192.34.56.5,
# the host by the name of "ahost",
# all the hosts in the network "anetwork"
#
# mountd deny 192.23.4.3
#
# The mountd entry denies host 192.23.4.3 access to the NFS rpc.mountd
# server.
#
# Hosts and network names must be official names, not aliases.
# See the inetd.sec(4) manual page for more information.
dtspc allow 127.0.0.1 loopback testbox

Suraj