openssh client hangs after SSH2_MSG_KEXINIT sent

Hi all=2E Can anyone shed some light why this is happening? I can connect
from other hosts except from this one=2E No firewalls or packet modifiers=
=2E
Thank you very much=2E=20

$ ssh -vvv user@dev=2Edomain=2Ecom
OpenSSH_4=2E3p2, OpenSSL 0=2E9=2E8b 04 May 2006
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to dev=2Edomain=2Ecom [X=2EX=2EX=2EX] port 22=2E
debug1: Connection established=2E
debug1: identity file /home/ruiwen/=2Essh/identity type -1
debug1: identity file /home/ruiwen/=2Essh/id_rsa type 1
debug1: identity file /home/ruiwen/=2Essh/id_dsa type -1
debug1: Remote protocol version 2=2E0, remote software version
OpenSSH_4=2E2p1 Debian-7ubuntu3=2E1
debug1: match: OpenSSH_4=2E2p1 Debian-7ubuntu3=2E1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2=2E0
debug1: Local version string SSH-2=2E0-OpenSSH_4=2E3
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent

Regards,
Marc

TREND MICRO EMAIL NOTICE
The information contained in this email and any attachments is confidential=
 and may be subject to copyright or other intellectual property protection=
=2E If you are not the intended recipient, you are not authorized to use or=
 disclose this information, and we request that you notify us by reply mail=
 or telephone and delete the original message from your mail system=2E