我一直在尝试调试 LDAP 连接，因此我ldapsearch通过sudo apt install ldap-utils. 这是命令的输出：
# ldapsearch -x -LLL -H ldaps://myip -d1 -ZZ
ldap_url_parse_ext(ldaps://myip)
ldap_create
ldap_url_parse_ext(ldaps://myip/??base)
ldap_extended_operation_s
ldap_extended_operation
ldap_send_initial_request
ldap_new_connection 1 1 0
ldap_int_open_connection
ldap_connect_to_host: TCP myip:636
ldap_new_socket: 4
ldap_prepare_socket: 4
ldap_connect_to_host: Trying myip:636
ldap_pvt_connect: fd: 4 tm: -1 async: 0
attempting to connect:
connect success
TLS: peer cert untrusted or revoked (0x42)
TLS: can't connect: (unknown error code).
ldap_err2string
ldap_start_tls: Can't contact LDAP server (-1)
additional info: (unknown error code)
具体来说，我关注这一行：
TLS: peer …
我花了太长时间弄清楚这一点，并想分享。
简单任务：将静态 IP 地址添加到我服务器上 4 个 NIC 中的第 2 个。
首先，我按照静态 IP 地址分配下的说明进行操作：https : //help.ubuntu.com/14.04/serverguide/network-configuration.html
interfaces 文件：
$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto em1
iface em1 inet dhcp
auto em2
iface em2 inet static
address 172.24.0.9
netmask 255.255.0.0
然后我sudo ifup em2按照说明运行。 …