Host Computer Configuration

Install tftp onto the Linux host computer

TFTP is used to copy the VxWorks kernel onto the ROC

For CentOS I used yum

yum install tftp

yum install tftp-server

then I looked in the file

/etc/xinetd.d/tftp

1. default: off
2. description: The tftp server serves files using the trivial file transfer \
3. protocol. The tftp protocol is often used to boot diskless \
4. workstations, download configuration files to network-aware printers, \
5. and to start the installation process for some operating systems.

service tftp

{

       socket_type             = dgram
       protocol                = udp
       wait                    = yes
       user                    = root
       server                  = /usr/sbin/in.tftpd
       server_args             = -s /tftpboot
       disable                 = yes
       per_source              = 11
       cps                     = 100 2
       flags                   = IPv4

}

to see how tftp was configured by default. The file tell me that the tftp files should be located in the subdirectory

/tftpboot

make sure your boot kernels are located in /tftpboot

[root@daq1 /]# ls tftpboot/
boot6100_121_v3.bin  boot6100_122.bin

turn the server on

/sbin/chkconfig tftp on

Set up rsh

turn on rsh

use yum to install the rsh server.

yum install rsh-server

edit /etc/xinetd.d/rlogin and rsh to allow server

# default: on
# description: rlogind is the server for the rlogin(1) program.  The server \
#       provides a remote login facility with authentication based on \
#       privileged port numbers from trusted hosts.
service login
{
       socket_type             = stream
       wait                    = no
       user                    = root
       log_on_success          += USERID
       log_on_failure          += USERID
       server                  = /usr/sbin/in.rlogind
       disable                 = no
}

Now reload xinitd

/etc/init.d/xinetd reload

then add a file called ".rhosts" to the daq account with the IP addresses and usernames

~ >less .rhosts

 134.50.3.210 daq
 10.1.1.2 roc1

old version is below
~ >less .rhosts
 134.50.3.216 roc1
 134.50.3.216 daq
 134.50.3.210 daq

You Must set the .rhosts permissions exaclty as below otherwise rsh will not work

chmod 644 .rhosts

Update hosts file

set /etc/hosts file to say

1. Do not remove the following line, or various programs
2. that require network functionality will fail.

127.0.0.1 daq1.physics.isu.edu daq1 localhost.localdomain localhos t

1 localhost6.localdomain6 localhost6

134.50.3.210 daq1.physics.isu.edu daq1 10.1.1.1 localdaq.physics.isu.edu localdaq 10.1.1.2 roc1.physics.isu.edu roc1

the above will assign IP addesses to computer names

test to see if rsh is running

rsh -l daq daq1 ls

Security/Firewall

Turn off iptables

/sbin/service iptables stop

eth1 configuration

The ehternet card on the hsot computer has two ports (eth0 and eth1).

eth0 is used to talk to the work and use DNS

eth1 is hardwired to a subnet

in this case the ROC is configured to address 10.1.1.2

The eth1 port is set to

"statically set IP addresses"

and the manual IP address setting is 10.1.1.1

after you activate eht1 you can telnet to the ROC using

telnet 10.1.1.2

You can then create an entry in /etc/hosts which aliases roc1 to this IP address

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