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| The 40m has two network segments: the general Caltech 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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| = Caltech network = | = LIGO Caltech 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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| IP addresses on the martian network are in the form 131.215.'''113'''.XXX | . IP addresses on the martian network are in the form 192.168.'''113'''.XXX |
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| The wireless network is on the martian network. | . The wireless network is on the martian network. |
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| || Gateway || 131.215.113.2 || | || Gateway || 192.168.113.2 || || netmask || 255.255.255.0 || || 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. . When you want to add a new host to the Martian network [[CDS/How_to_join_martian | 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 [[https://nodus.ligo.caltech.edu:8081/40m/11916|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 [[https://blogging.dragon.org.uk/dns-with-bind9-and-dhcp-on-ubuntu-14-04/|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}}} |
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