Differences between revisions 8 and 60 (spanning 52 versions)

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 TP-Link RE330 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.
The repeaters can be managed by coonecting to the wifi network and going to 192.168.0.254 or using TP-Link Tether App. The password for all repeaters is usual workstation password of 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

-  ⇤ ← Revision 8 as of 2008-09-17 17:48:37 → 
  Size: 2832
  Editor: JoeBetzwieser
  Comment:
+   ← Revision 60 as of 2021-08-19 09:54:10 → ⇥
  Size: 3672
  Editor: AnchalguptaATligoDOTorg
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
-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. '''
 Line 5:
-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 TP-Link RE330 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.
 * The repeaters can be managed by coonecting to the wifi network and going to 192.168.0.254 or using TP-Link Tether App. The password for all repeaters is usual workstation password of the lab.
-Line 9:
+Line 13:
-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
-Line 11:
+Line 15:
-The wireless network is on the martian network.
+ . The wireless network is on the martian network.
-Line 13:
+Line 17:
-|| Gateway    || 131.215.113.2    ||
+|| Gateway    || 192.168.113.2    ||
-Line 15:
+Line 19:
+|| nameserver || 192.168.113.104  ||
-Line 19:
+Line 24:
-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]]
-Line 21:
+Line 31:
-== Wireless 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]].
-Line 23:
+Line 34:
-The wireless network is part of the Martian Network.  The Martian ethernet is bridged to wireless via a Linksys Wireless-G access point with IP address 131.215.113.220.  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.  The configuration password for the wireless AP is written in a manilla folder in the usual place where equipment manuals are kept.
+== Martian Wireless Network ==
-Line 26:
+Line 36:
-== How to setup linux1 with a name server ==
+=== Wifi router ===
-Line 28:
+Line 38:
-) Linux1 needs network interface statically configured.  Example on Debian:  edit /etc/network/interfaces, make an entry like
+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]]
-Line 30:
+Line 40:
-iface eth0 inet static
+The router supports a 2 GHz network (11g) named "40MARS" and a 5 GHz network (11ac) "40MARS_5G". These two SSIDs are hidden.
-Line 32:
+Line 42:
-# Intel Corporation 82801DB PRO/100 VE (LOM) Ethernet Controller
+The martian IP address of this unit is 192.168.113.232.
-Line 34:
+Line 44:
-DEVICE=eth0
+username:
-Line 36:
+Line 46:
-BROADCAST=131.215.113.255
+password:
-Line 38:
+Line 48:
-HWADDR=00:07:e9:b8:ea:9c
+=== Wireless Bridge for GPIB instruments ===
-Line 40:
+Line 50:
-IPADDR=131.215.113.20
+On Jan 8th, 2016, a new wireless bridge (NETGEAR EX3700) for GPIB instruments was installed.
-Line 42:
+Line 52:
-NETMASK=255.255.255.0
+Device Name: EX3700_1, Fixed IP: 192.168.113.233
-Line 44:
+Line 54:
-NETWORK=131.215.113.0
+It accepts ethernet (wired) devices with fixed IP of 192.168.113.XXX
-Line 46:
+Line 56:
-ONBOOT=yes
+[[How_To_Configure_NETGEAR_EX3700]]
-Line 48:
+Line 58:
-GATEWAY=131.215.113.2
+== 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]].
-Line 50:
+Line 61:
-TYPE=Ethernet
+Configuration files can be found at{{{
chiara:/etc/bind/named.conf.local
chiara:/etc/dhcp/dhcpd.conf
}}}
-Line 52:
+Line 66:
+and other files in those same directories.
-Line 53:
+Line 68:
+== Mount NFS filesystem ==
-Line 54:
+Line 70:
-(but figure out how on a CentOS box, it'll be different).
+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
}}}
-Line 56:
+Line 74:
-) Setup the name system-config-bind (needs to be done locally with GUI).  Notes:

- periods are important
- the forward look up (name to IP address) can list multiple names for the same IP address.  use this to give IP addresses to "services" not just specific computers.  For example, "ns.martian" is the name server, and can have the same IP address as "linux1.martian". 
- in named.conf.options be sure to enable all the interfaces that are needed, including the loop-back device (127.0.0.1)

3) Add 127.0.0.1 to /etc/resolv.conf before all the other name servers, as in

nameserver 127.0.0.1

At this point you should be able to do host name look-ups:  "host linux1.martian"  If not, fix before continuing

4) replace dhcpv6_client with dhclient and add dhcp (the server package).

5) edit config file (/etc/dhcp3/dhcpd.conf on a Debian system).

6) turn off all other dhcp servers on network (linksys thing), and try rebooting something and see if it picks up an IP address and gets told the correct gateway and name server blah blah blah.

7) when you edit a config file, you'll need to restart the service.  for example, with

/etc/init.d/bind restart
+Then make the directory where the ''/cvs/cds'' dir will be mounted, mount the filesystem via {{{
mkdir -p /cvs/cds
sudo mount /cvs/cds}}}