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

LIGO Caltech network

Martian network

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 
```

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

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

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

Device Name: EX3700_1, Fixed IP: 192.168.113.233

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

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.

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 linux1 will be mounted, and try to mount the filesystem via

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

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.

Anyone can log in to the router by any web browser. The login password is set to admin.