环境：AIX5.3 9117-MMA在cbp3_1系统上bcare用户ssh到billing用户时直接显示：Connection closed by 127.0.0.1
系统可以ssh到其他机器，bcare也可以ssh自己
各位高手帮忙看看原因，谢谢！
<3 cbp3_1 [bcare] :/home/bcare>ssh -v billing1@localhost
OpenSSH_5.2p1, OpenSSL 0.9.8m 25 Feb 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Failed dlopen: /usr/krb5/lib/libkrb5.a(libkrb5.a.so): 0509-022 Cannot load module /usr/krb5/lib/libkrb5.a(libkrb5.a.so).
0509-026 System error: A file or directory in the path name does not exist.
debug1: Error loading Kerberos, disabling Kerberos auth.
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /home/bcare/.ssh/identity type -1
debug1: identity file /home/bcare/.ssh/id_rsa type 1
debug1: identity file /home/bcare/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.2
debug1: match: OpenSSH_5.2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.2
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'localhost' is known and matches the RSA host key.
debug1: Found key in /home/bcare/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /home/bcare/.ssh/identity
debug1: Offering public key: /home/bcare/.ssh/id_rsa
Connection closed by 127.0.0.1
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