VPN connection suddenly stopped functioning

Archived from groups: comp.dcom.vpn (More info?)

Hi,

we have a VPN connection between my company and a customer, between 2
Linux Servers. Suddenly, several days ago it stopped functioning. My
knowledge of Linux is so small, so I had to search the internet, and
what I found is, when I execute the :
ipsec verify , a get the following output:
----------------------------------------------------------------------------
gw:~# ipsec verify
Checking your system to see if IPsec got installed and started
correctly
Version check and ipsec on-path [OK]
Checking for KLIPS support in kernel [OK]
Checking for RSA private key (/etc/ipsec.secrets) ipsec
showhostkey: no default key
in "/etc/ipsec.secrets"
[FAILED]
Checking that pluto is running [OK]
DNS checks.
Looking for TXT in forward map: gw [MISSING]
Does the machine have at least one non-private address [FAILED]
Two or more interfaces found, checking IP forwarding [OK]
Checking NAT and MASQUERADING
----------------------------------------------------------------------------

Cann anyone tell me, what these error messages regarding
/etc/ipsec.secrets and the "non-private adress" mean?

Thanks,
Dimce