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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 hidden SSID "40m" (2GHz), "40m5G1" and "40m5G2" (5GHz). The router is nominally located on the top of the computer rack in the office area. |
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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. | . See the [[Martian_Host_Table|Martian host table]] for IP address assignments on the martian network. |
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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]]. | . 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. . {{{ shh allegra.martian }}} |
. 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 }}} . Note that all the access from outside should go through nodus, while the connection from inside to outside is gatewayed by the NAT router (192.168.113.2). |
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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. | 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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| . 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 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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| . The manual for the router is here: attachment:WRT600N_Manual.pdf | The martian IP address of this unit is 192.168.113.232. |
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| . Here are several screen shots of the configuration screens: attachment:screen1.pdf attachment:screen2.pdf attachment:screen3.pdf attachment:screen4.pdf | == Wireless Bridge for GPIB instruments == |
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| . 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 | On Jan 8th, 2016, a new wireless bridge (NETGEAR EX3700) for GPIB instruments was installed. |
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| . 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. | Device Name: EX3700_1, Fixed IP: 192.168.113.233 |
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| . 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. | It accepts ethernet (wired) devices with fixed IP of 192.168.113.XXX |
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| . The SSID of the martian wireless network is {{{40MARS}}}. | [[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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| == 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 |
Configuration files can be found at{{{ chiara:/etc/bind/named.conf.local chiara:/etc/dhcp/dhcpd.conf |
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| . Then reboot the computer. If it's mounted correctly you will find some directories under {{{/cvs/cds/}}} | |
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| == 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. |
and other files in those same directories. |
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| || '''network address''' || 192.168.113.178 || || || '''internal address'''|| 192.168.1.1 || || || ''' DHCP address ''' || 192.168.1.100-150|| currently disabled || |
== 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 }}} |
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| . Anyone can log in to the router by any web browser. The login password is set to {{{admin}}}. == 40m Martian Computer List (.odp format) == . attachment:40m%20Martian%20Network%20Computer%20List |
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 hidden SSID "40m" (2GHz), "40m5G1" and "40m5G2" (5GHz). The router is nominally located on the top of the computer rack in the office area.
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 |
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.
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
- Note that all the access from outside should go through nodus, while the connection from inside to outside is gatewayed by the NAT router (192.168.113.2).
Wireless Network
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.
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