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''' The 40m has two network segments: the LIGO general computing network and an internal "martian" network. ''' ''' The 40m has two networks: the LIGO general computing network and an internal "martian" network. '''
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 . IP addresses on this network are in the form 131.215.'''114'''.XXX  * IP addresses on this network are in the form 131.215.'''114'''.XXX and 131.215.'''115'''.XXX .

 * The wireless router connected to the caltech net has SSID "40m" (2GHz), "40m_5G1" and "40m_5G2" (5GHz). The router is nominally located on the top of the computer rack in the office area.
 * 5 wifi repeaters have been installed, one at the vertex, 2 at midpoints of each arm, and at the 2 ends to flood the whole lab with "40m" (2GHz) and "40m_5G1" (5GHz) networks. These allow the use of laptops/phones outside the martian network for googling and remote loging while working in the lab.
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|| nameserver || 192.168.113.20  || || nameserver || 192.168.113.104 ||
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 . See also [[Martian_Host_Table]] for IP address assignments on the martian network.  * The new net router installed Jun 27, 2018 is controlling all the traffic between the GC net and the martian net.
    * The net router has the outside IP of 131.215.115.200, and internal IP of 192.168.113.2
    * It transmits all the trafic from inside to outside, but does only particular access from outside.
    * nodus.ligo.caltech.edu is now the alias of 131.315.115.200.
    * To ssh to one of the martian computers from a GC computer, ssh into `controls@nodus`, then use `name` (or `name.martian`) for the name. i.e.{{{ssh pianosa.martian }}}
    * NAT Router setting page: [[FirewallSetting]]
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 . When you add a new host to the Martian network, choose a name from [[Computers_and_Scripts/Pool_of_Names_for_Computers]].  * See the [[Martian_Host_Table|Martian host table]] for IP address assignments on the martian network.
    * When you want to add a new host to the Martian network [[CDS/How_to_join_martian | read this]].
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 . To ssh to one of the martian computers from a GC computer, ssh into {{{controls@nodus}}}, then use "name.martian" for the name. i.e.
 . {{{ssh pianosa.martian }}}		 == Martian Wireless Network ==
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=== Wifi router ===
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== Wireless Network == On Jan 6th, 2016, the Martian wifi router was replaced with a Netgear R6400. Link to the corresponding [[https://nodus.ligo.caltech.edu:8081/40m/11916|ELOG entry]]
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On Jan 6th, 2016, the martian wifi router was replaced to Netgear R6400. Link to the corresponding ELOG entry [[https://nodus.ligo.caltech.edu:8081/40m/11916]] The router supports a 2 GHz network (11g) named "40MARS" and a 5 GHz network (11ac) "40MARS_5G". These two SSIDs are hidden.
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This router supports 2GHz network (11g) named "40MARS" and 5GHz network (11ac) "40MARS_5G". These two SSIDs are hidden. The martian IP address of this unit is 192.168.113.232.
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== Wireless Bridge for GPIB instruments == username:
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On Jan 8th, 2016, a new wireless bridge (NETGEAR EX3700) for GPIB instruments is installed. password:

=== Wireless Bridge for GPIB instruments ===

On Jan 8th, 2016, a new wireless bridge (NETGEAR EX3700) for GPIB instruments was installed.
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It accepts ethernet (wired) device with fixed IP of 192.168.113.XXX It accepts ethernet (wired) devices with fixed IP of 192.168.113.XXX
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HowToConfigureNETGEAREX3700 [[How_To_Configure_NETGEAR_EX3700]]
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--------- == Nameserver and DHCP ==
`chiara` runs the DNS and DHCP for the Martian network, set up largely in the manner detailed in [[https://blogging.dragon.org.uk/dns-with-bind9-and-dhcp-on-ubuntu-14-04/|this website]].
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Below this point the description is too old and is not valild any more (KA, Jan 8, 2016) Configuration files can be found at{{{
chiara:/etc/bind/named.conf.local
chiara:/etc/dhcp/dhcpd.conf
}}}
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--------- and other files in those same directories.
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== Mount NFS filesystem ==
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== Wireless Network == If you want to mount the `/cvs/cds` NFS filesystem on a computer already on the martian network, add the following line to the file {{{/etc/fstab}}}{{{
chiara:/home/cds /cvs/cds nfs rw,bg,nfsvers=3
}}}
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 . The wireless network is part of the Martian Network. The Martian ethernet is bridged to wireless via a Linksys WRT600N wireless router with IP address https://192.168.113.220. Note that the wireless access point is only bridging the wired and wireless networks--it does not do NAT. To access the outside world, your network settings should be the same as given above for the Martian network.

 . You can configure the router by accessing its IP address with a web browser.
 . The password for configuring the wireless AP is {{{ll_admin}}}.

 . The manual for the router is here: [[attachment:WRT600N_Manual.pdf]]

 . Here are several screen shots of the configuration screens: [[attachment:screen1.pdf]] [[attachment:screen2.pdf]] [[attachment:screen3.pdf]] [[attachment:screen4.pdf]]

 . Here is attached the router's configuration file as of June 7, 2011. The router can reload this file if it gets lost or corrupted. [[attachment:MartianRouter.bin]]

 . Basically, you don't care about the internet setup because you don't connect anything to the WAN port. The physical connection to the router is just one martian LAN cable to one of the LAN ports.

 . Security is enforced by the MAC address filtering. Only registered machines can connect to the wireless network. Whenever you reset the router (not power cycle), you should register all the lab laptops to the router.

 . The SSID of the martian wireless network is {{{40MARS}}}.


== Mount linux1 ==
 . If you want to mount ''linux1'' on a computer in order to share data on Martian network, add the following line on the file {{{/etc/fstab}}}
 . {{{
linux1:/home/cds /cvs/cds nfs rw,bg,soft 0 0
}}}
 . Then make the directory where the ''linux1'' will be mounted on
 . {{{ mkdir /cvs && mkdir /cvs/cds
}}}
 . Then reboot the computer. If it's mounted correctly you will find some directories under {{{/cvs/cds/}}}

== Firewalling by Router:WRT310N ==
 . A firewall is used for network isolation between a new CDS computer and the existing CDS system. It nicely allows to avoid a network conflict. For this purpose, a network router: ''LINKSYS WRT310N'' has been employed.

|| '''network address''' || 192.168.113.178 || ||
|| '''internal address'''|| 192.168.1.1 || ||
|| ''' DHCP address ''' || 192.168.1.100-150|| currently disabled ||

 . Anyone can log in to the router by any web browser. The login password is set to {{{admin}}}.		 Then make the directory where the ''/cvs/cds'' dir will be mounted, mount the filesystem via {{{
mkdir -p /cvs/cds
sudo mount /cvs/cds}}}

The 40m has two networks: the LIGO general computing network and an internal "martian" network.

LIGO Caltech network

  • IP addresses on this network are in the form 131.215.114.XXX and 131.215.115.XXX .

  • The wireless router connected to the caltech net has SSID "40m" (2GHz), "40m_5G1" and "40m_5G2" (5GHz). The router is nominally located on the top of the computer rack in the office area.
  • 5 wifi repeaters have been installed, one at the vertex, 2 at midpoints of each arm, and at the 2 ends to flood the whole lab with "40m" (2GHz) and "40m_5G1" (5GHz) networks. These allow the use of laptops/phones outside the martian network for googling and remote loging while working in the lab.

Martian network

  • IP addresses on the martian network are in the form 192.168.113.XXX

  • The wireless network is on the martian network.

Gateway

192.168.113.2

netmask

255.255.255.0

nameserver

192.168.113.104

nameserver

131.215.125.1

nameserver

131.215.139.100

nameserver

131.215.254.99

  • The new net router installed Jun 27, 2018 is controlling all the traffic between the GC net and the martian net.
    • The net router has the outside IP of 131.215.115.200, and internal IP of 192.168.113.2
    • It transmits all the trafic from inside to outside, but does only particular access from outside.
    • nodus.ligo.caltech.edu is now the alias of 131.315.115.200.

    • To ssh to one of the martian computers from a GC computer, ssh into controls@nodus, then use name (or name.martian) for the name. i.e.ssh pianosa.martian 

    • NAT Router setting page: FirewallSetting

  • See the Martian host table for IP address assignments on the martian network.

    • When you want to add a new host to the Martian network read this.

Martian Wireless Network

Wifi router

On Jan 6th, 2016, the Martian wifi router was replaced with a Netgear R6400. Link to the corresponding ELOG entry

The router supports a 2 GHz network (11g) named "40MARS" and a 5 GHz network (11ac) "40MARS_5G". These two SSIDs are hidden.

The martian IP address of this unit is 192.168.113.232.

username:

password:

Wireless Bridge for GPIB instruments

On Jan 8th, 2016, a new wireless bridge (NETGEAR EX3700) for GPIB instruments was installed.

Device Name: EX3700_1, Fixed IP: 192.168.113.233

It accepts ethernet (wired) devices with fixed IP of 192.168.113.XXX

How_To_Configure_NETGEAR_EX3700

Nameserver and DHCP

chiara runs the DNS and DHCP for the Martian network, set up largely in the manner detailed in this website.

Configuration files can be found at

chiara:/etc/bind/named.conf.local
chiara:/etc/dhcp/dhcpd.conf

and other files in those same directories.

Mount NFS filesystem

If you want to mount the /cvs/cds NFS filesystem on a computer already on the martian network, add the following line to the file /etc/fstab

chiara:/home/cds              /cvs/cds        nfs     rw,bg,nfsvers=3

Then make the directory where the /cvs/cds dir will be mounted, mount the filesystem via 

mkdir -p /cvs/cds
sudo mount /cvs/cds

Network (last edited 2021-08-19 09:54:10 by AnchalguptaATligoDOTorg)