unable to telnet to FHEM

I am using FHEM for home automation and it runs perfectly. But since some days I am no more able to connect to FHEM using telnet from my RPI.
FHEM is running by "perl fhem.pl fhem.cfg" and I can connect to

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telnet 192.168.2.118 7072

from my iMac via local network, but when I try to connect directly from my RPI using

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telnet localhost 7072

my RPI responds:

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Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection timed out

So I am no more able to e.g shutdown my FHEM using

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perl fhem.pl 7072 "shutdown"

or any other command.
Any ideas?
Thanks in advance

What happens when you type

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telnet 192.168.2.118 7072


on your Raspi?

unfortunately:

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Trying 192.168.2.118...
telnet: Unable to connect to remote host: Connection timed out

Can you post the output of

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ifconfig


The output of ifconfig is
$ ifconfig

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eth0      Link encap:Ethernet  Hardware Adresse b8:27:eb:cd:91:0f 
          inet Adresse:192.168.2.118  Bcast:192.168.2.255  Maske:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metrik:1
          RX packets:412917 errors:0 dropped:278 overruns:0 frame:0
          TX packets:345282 errors:0 dropped:0 overruns:0 carrier:0
          Kollisionen:0 Sendewarteschlangenlänge:1000
          RX bytes:57095754 (54.4 MiB)  TX bytes:62281294 (59.3 MiB)

No "lo" interface?

Thanks, you got it!

I forgot to add

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auto lo
iface lo inet loopback


to /etc/networking/interfaces

so ... now it works?

yep, thanks again!