Cannot use git clone git://git.calculate.ru/overlay.git

Hi ,
I have problem with my CDS ,
When i use layman -d calculate
it says:- * Overlay “calculate” does not exist!

When i use layman -a calculate, it stucks at
Running command “/usr/bin/git clone “git://git.calculate.ru/dev/overlay.git” “/usr/local/portage/layman/calculate””…
Initialized empty Git repository in /usr/local/portage/layman/calculate/.git/

and then after sometime it says:
Initialized empty Git repository in /usr/local/portage/layman/calculate/.git/
git.calculate.ru[0: 212.113.122.130]: errno=Connection timed out
fatal: unable to connect a socket (Connection timed out)

* Failed to add overlay “calculate”.

* Error was: Adding the overlay failed! Possible remains of the opration have NOT been removed and may be left at /usr/local/portage/layman/calculate. Please remove them manually if required.
Doesn’t downloads anything:
I have :–in /usr/local/portage/layman/

calculate share # ls -ld /usr/local/portage/layman/*
-rw-r--r-- 1 root root  72209 2010-03-05 12:50 /usr/local/portage/layman/cache_65bd38402ac8431067b54904bd2ed2d1.xml
-rw-r--r-- 1 root root 396918 2010-01-25 13:03 /usr/local/portage/layman/calculate.tar.gz
-rw-r--r-- 1 root root     91 2010-01-25 13:04 /usr/local/portage/layman/make.conf
-rw-r--r-- 1 root root     35 2010-01-25 10:50 /usr/local/portage/layman/overlays.xml

Not sure whether it would be a good decision to remove all these files,

I have opened the port 9418 on Network and i can download updates on my Ubuntu System by typing
git://git.calculate.ru/overlay.git.(Just to make sure that network is not the problem)
I have created a temp directory in /tmp and then initialized:

cd /tmp && rm -rf overlay && git clone git://git.calculate.ru/overlay.git && pwd && ls -la

Output was:-
Initialized empty Git repository in /tmp/overlay/.git/
git.calculate.ru[0: 212.113.122.130]: errno=Connection timed out
fatal: unable to connect a socket (Connection timed out)

I can download updates on all ubuntu machines and CLD’s but not on CDS (main server).That is for sure that i have
some problem in my CDS Configuration.Can you please help me to get out of this problem
I willing to update one package:sys-apps/calculate-server-2.1.9
when i type cat /etc/issue , it says Welcome to \n.\O (Calculate Directory Server 10.0)

My work and update are stopped, early reply would be appreciated.

Thanks & Regards
Pranav Sharma

Run

nmap -p 9418 git.calculate.ru

Correct output

PORT     STATE SERVICE
9418/tcp open  unknown

My output is
PORT STATE SERVICE
9418/tcp filtered unknown

But with the same network, system next to it is CLD Client can actually get updates from web in the form of git
repository and i can run layman -a calculate, it does downloading.Same i can do on Ubuntu system in the same network
If network would have been the problem other system should face the same issue.!~
I think i have files left as i have mentioned ,please see response which i get below

Initialized empty Git repository in /usr/local/portage/layman/calculate/.git/
git.calculate.ru[0: 212.113.122.130]: errno=Connection timed out
fatal: unable to connect a socket (Connection timed out)

* Failed to add overlay “calculate”.
* Error was: Adding the overlay failed! Possible remains of the opration have NOT been removed and may be left at /usr/local/portage/layman/calculate. Please remove them manually if required.

This is what i have in my usr/local/portage/layman/,

* rw-r-r-- 1 root root 72209 2010-03-05 12:50 /usr/local/portage/layman/cache_65bd38402ac8431067b54904bd2ed2d1.xml
rw-r-r-- 1 root root 396918 2010-01-25 13:03 /usr/local/portage/layman/calculate.tar.gz
rw-r-r-- 1 root root 91 2010-01-25 13:04 /usr/local/portage/layman/make.conf
rw-r-r-- 1 root root 35 2010-01-25 10:50 /usr/local/portage/layman/overlays.xml

Some file configurations might be incorrect in CDS, Please suggest