下载openssh 3.5p1 http://www.openssh.org/
1）在x86环境下
./configure --sysconfdir=/etc/ssh ssh密钥目录
编辑Makefile
2）在ssh和sshd的编译选项上加-static参数，静态编译，动态编译出来总是找glic 2.2.4库。
strip ssh sshd
3）/etc/ssh下放上sshd_config和密钥文件
4）touch /var/log/lastlog
5）加入sshd用户
/etc/passwd
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
/etc/group
sshd:x:74:
/etc/shadow
sshd:!!:13196:0:99999:7:::
6）拷贝随机数设备
/dev/urandom
crw-r--r-- 1 root root 1, 9 Mar 23 09:42 /dev/urandom
7）运行sshd
sshd -d -4
-d debug模式
-4 只支持ipv4
sshd_config
# $OpenBSD: sshd_config,v 1.34 2001/02/24 10:37:26 deraadt Exp $
# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
# This is the sshd server system-wide configuration file. See sshd(8)
# for more information.
Port 22
Protocol 2,1
ListenAddress 0.0.0.0
#ListenAddress ::
HostKey /etc/ssh/ssh_host_key
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
ServerKeyBits 768
LoginGraceTime 600
KeyRegenerationInterval 3600
PermitRootLogin yes
#
# Don't read ~/.rhosts and ~/.shosts files
IgnoreRhosts yes
# Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
#IgnoreUserKnownHosts yes
StrictModes yes
X11Forwarding yes
X11DisplayOffset 10
PrintMotd yes
KeepAlive yes
# Logging
#SyslogFacility AUTHPRIV
LogLevel INFO
#obsoletes QuietMode and FascistLogging
RhostsAuthentication no
#
# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
RhostsRSAAuthentication no
#
RSAAuthentication yes
# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication yes
PermitEmptyPasswords yes
# Comment to enable s/key passwords or PAM interactive authentication
# NB. Neither of these are compiled in by default. Please read the
# notes in the sshd(8) manpage before enabling this on a PAM system.
#ChallengeResponseAuthentication no
# To change Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#AFSTokenPassing no
#KerberosTicketCleanup no
# Kerberos TGT Passing does only work with the AFS kaserver
#KerberosTgtPassing yes
#CheckMail yes
#UseLogin no
#MaxStartups 10:30:60
#Banner /etc/issue.net
#ReverseMappingCheck yes
#Subsystem sftp /usr/libexec/openssh/sftp-server