パスワードのプロンプトが表示されるまでの ssh-login の動作が遅くなります

Issue

詳細モードのログインは、以下のように記録されます。

[root@user]# ssh -vvv user@host1
OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010
debug1:Reading configuration data /etc/ssh/ssh_config
debug1:Applying options for *
debug2: ssh_connect: needpriv 0
debug1:Connecting to host1 [10.0.0.1] port 22.
debug1:Connection established.
debug1: permanently_set_uid:0/0
debug1: identity file /root/.ssh/identity type -1
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1:Remote protocol version 2.0, remote software version OpenSSH_5.3
debug1: match:OpenSSH_5.3 pat OpenSSH*
debug1:Enabling compatibility mode for protocol 2.0
debug1:Local version string SSH-2.0-OpenSSH_5.3
debug2: fd 3 setting O_NONBLOCK
debug1:SSH2_MSG_KEXINIT sent
debug3:Wrote 792 bytes for a total of 813
debug1:SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: found hmac-md5
debug1: kex: server->client aes128-ctr hmac-md5 none
debug2: mac_setup: found hmac-md5
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
debug3:Wrote 24 bytes for a total of 837
debug2: dh_gen_key: priv key bits set:137/256
debug2: bits set:506/1024
debug1:SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3:Wrote 144 bytes for a total of 981
debug3: check_host_in_hostfile: filename /root/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 8
debug3: check_host_in_hostfile: filename /root/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 8
debug1:Host 'host1' is known and matches the RSA host key.
debug1:Found key in /root/.ssh/known_hosts:8
debug2: bits set:513/1024
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1:SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3:Wrote 16 bytes for a total of 997
debug2: set_newkeys: mode 0
debug1:SSH2_MSG_NEWKEYS received
debug1:SSH2_MSG_SERVICE_REQUEST sent
debug3:Wrote 48 bytes for a total of 1045
debug2: service_accept: ssh-userauth
debug1:SSH2_MSG_SERVICE_ACCEPT received
debug2: key:/root/.ssh/identity ((nil))
debug2: key:/root/.ssh/id_rsa ((nil))
debug2: key:/root/.ssh/id_dsa ((nil))
debug3:Wrote 64 bytes for a total of 1109
debug1:Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup gssapi-keyex
debug3: remaining preferred: gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-keyex
debug1:Next authentication method: gssapi-keyex
debug1:No valid Key exchange context
debug2: we did not send a packet, disable method
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-with-mic
debug1:Next authentication method: gssapi-with-mic
debug3:Trying to reverse map address 137.34.94.63.
debug1:Unspecified GSS failure.Minor code may provide more information
Credentials cache file '/tmp/krb5cc_0' not found

debug1:Unspecified GSS failure.Minor code may provide more information
Credentials cache file '/tmp/krb5cc_0' not found

debug1:Unspecified GSS failure.Minor code may provide more information


debug1:Unspecified GSS failure.Minor code may provide more information


debug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1:Next authentication method: publickey
debug1:Trying private key:/root/.ssh/identity
debug3: no such identity:/root/.ssh/identity
debug1:Trying private key:/root/.ssh/id_rsa
debug3: no such identity:/root/.ssh/id_rsa
debug1:Trying private key:/root/.ssh/id_dsa
debug3: no such identity:/root/.ssh/id_dsa
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred:,password
debug3: authmethod_is_enabled password
debug1:Next authentication method: password
user@host1's password: