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GarliCat HOWTO
This is a quick introduction into setting up I2P for GarliCat. It is assumed
that you already have installed I2P. This HOWTO is based on I2P version
0.7.7-0.
1 DOWNLOAD
First get the GarliCat branch of OnionCat 0.2.0, revision 529 or higher. It
is found here: http://www.cypherpunk.at/ocat/download/Source/0.2.0/unofficial
2 COMPILE AND INSTALL
Unpack it, change into the directory and run './configure', 'make' and 'make
install'. If something goes wrong, read the error messages and try to fix the
problem.
3 CONFIGURE I2P
GarliCat is able to connect to other GarliCats and lets others to connect to
you, hence, the GarliCat software contains a server and a client part. Thus you
must configure a server and a client tunnel on your I2P router. The server is
the "incoming" part. I2P will assign an ID (a key) to it which is unique for
your server tunnel and your GarliCat, respectively. This ID is directly
translated into an IPv6 address, hence, also this IPv6 address is unique to
your GarliCat.
3.1 CONFIGURE SERVER TUNNEL
Open the I2P router console in your browser (http://127.0.0.1:7657/) and go to
"LOCAL DESTINATIONS" which is found at the bottom of the menu bar on the left
side. The "I2P Tunnel Page" (http://127.0.0.1:7657/i2ptunnel/) will open. In
the bottom right corner of the "I2P SERVER TUNNELS" box select "Standard"
(which should be selected by default) and click "Create". A new page opens. On
top enter a name, e.g. "GarliCat Incoming". Select the "Autostart" checkbox.
In the text field "Port" which is marked as required enter the port number
8061. Scroll to the bottom and press "Save".
3.2 CONFIGURE CLIENT TUNNEL
In the bottom right corner of the "I2P CLIENT TUNNELS" box select "SOCKS
4/4a/5" and press "Create". A new page opens. On top enter a name, e.g.
"GarliCat Outgoing". In the "Port" field which is marked as required enter the
port number 9051. Check the "Autostart" checkbox. Scroll down and press
"Save".
3.3 FIGURE OUT _YOUR_ GARLICAT I2P-ID
On the "i2ptunnel page" (http://127.0.0.1:7657/i2ptunnel/) -- you should
already be on this page after the last step of 3.2 -- you should see your
"GarliCat Inbound" tunnel in the "I2P SERVER TUNNELS" box. It lists a string
called "Base32 Address". Copy this string to a file. Truncate it to 16
characters and append the domain ".oc.b32.i2p". The result is your GarliCat
I2P-ID.
Example:
Base32 Address: ktmhezukbp6jyuldedcjmso6p4e6aegeikqli2mne67hnttgmvfa.b32.i2p
GarliCat I2P-ID: ktmhezukbp6jyuld.oc.b32.i2p
Your I2P router is now ready.
4 RUN GARLICAT
Your Garlicat I2P-ID is directly convertable into an IPv6 address and vice
versa by Garlicat. You can test if you figured out your GC I2P-ID correct by
running `gcat -i <your_gc_i2p_id>`. It should output an (your) IPv6 address.
Now start Garlicat as root and give your I2P-ID as a single parameter:
`gcat <your_gc_i2p_id>`
(Note: GarliCat will immediately drop root privileges after initialization).
You may have a look at the log files. By default, GarliCat logs to syslog with
facility "daemon".
If everything works you should now have a tunnel device (`ifconfig`) having
your IPv6 address configure. You should be able to ping to your own address
by running `ping6 <your_gc_ipv6_address>`.
5 TELL I2P FROM OTHER GARLICATS
Basically everything is ready now but you need to enter the I2P-IDs and keys
from others that you want to connect to to your I2P address book. The best way
to do this is using SusiDNS.
If you want to connect to someone else's GarliCat you first need to receive his
GarliCat IPv6 address, his I2P-ID, and his key. Then go to your Susi-DNS page
(click on "Addressbook" on your I2P Router console) and add a new entry being
the I2P-ID the name. Test if it works. Simply try to ping to the IPv6 address.
(NOTE: THERE MAY BE BETTER OPTIONS BUT THIS SECTION WAS WRITTEN BY SOMEONE
WHO DOES NOT NO TOO MUCH DETAILS ABOUT SUSIDNS, YET. SORRY.)
A APPENDIX
What is the difference between OnionCat and GarliCat?
OC and GC is basically the same. They completely share the code base. The
difference just lies in port numbers and the domain extensions which are
specific for Tor (.onion) and I2P (.oc.b32.i2p), respectively.
OC and GC can run in parallel on a host.
B AUTHOR
This HOWTO was written by Bernhard R. Fischer, 15th of November 2009.
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