No connection to CVS server - cvs login works, cvs update times out

[sokratessf]

Hi all,
I run a CentOS 5.1 VM image using VMServer on XP.

Out of the VM image I can successfully 'cvs login' to my CVS server. But when I start a 'cvs update', the connection times out.

netstat shows the connection as established:

# netstat -an | grep 2401
tcp 0 0 192.168.1.35:58651 85.25.xx.xx:2401 ESTABLISHED

This is scenario when I connect from home.

Using the same computer at work (other ISP) I have no problems - cvs update works just fine.
Can I assume that it is not a port/firewall issue, since "cvs login" is successful? Any clues where to start diggin' ?

I ran

# nmap -s U -p 2401 85.25.xx.xx

and received

# Starting Nmap 4.11 (

http://www.insecure.org/nmap/

) at 2009-07-07 12:02 CEST
# Interesting ports on loftxxx.xxx.xx (85.25.xx.xx):
# PORT STATE SERVICE
# 2401/udp closed cvspserver

from both locations (home/office)

Also I ran

# nmap -sS -p 2401 85.25.xx.xx

and got:

# Starting Nmap 4.11 (

http://www.insecure.org/nmap/

) at 2009-07-07 12:02 CEST
# Interesting ports on loftxxx.xxx.xx (85.25.xx.xx):
# PORT STATE SERVICE
# 2401/tcp open cvspserver

So udp seems not to be used and tcp/2401 is available.

CVS server domain is managed with dnsalias service (dyndns.org)


Tx in advance
Peter