默認下,centos5系統沒有安裝xinetd服務,需要安裝
ls /etc/xinetd.d/
cvs eklogin ekrb5-telnet gssftp klogin krb5-telnet kshell rsync
安裝xinetd
yum install xinetd
ls /etc/xinetd.d/
chargen-dgram daytime-dgram discard-stream eklogin klogin rsync time-stream chargen-stream daytime-stream echo-dgram ekrb5-telnet krb5-telnet tcpmux-server cvs discard-dgram echo-stream gssftp kshell time-dgram
默認地,time-dgram和 time-stream是關閉的,需要打開。
[root@TRIXBOX1 xinetd.d]# vim time-dgram
# This is the configuration for the udp/dgram time service.
service time
{
# This is for quick on or off of the service
disable = no
{
# This is for quick on or off of the service
disable = no
# The next attributes are mandatory for all services
id = time-dgram
type = INTERNAL
wait = yes
socket_type = dgram
# protocol = socket type is usually enough
id = time-dgram
type = INTERNAL
wait = yes
socket_type = dgram
# protocol = socket type is usually enough
# External services must fill out the following
# user =
# group =
# server =
# server_args =
# user =
# group =
# server =
# server_args =
# External services not listed in /etc/services must fill out the next one
# port =
# port =
# RPC based services must fill out these
# rpc_version =
# rpc_number =
# rpc_version =
# rpc_number =
# Logging options
# log_type =
# log_on_success =
# log_on_failure =
# log_type =
# log_on_success =
# log_on_failure =
# Networking options
# flags =
# bind =
# redirect =
# v6only =
# flags =
# bind =
# redirect =
# v6only =
# Access restrictions
# only_from =
# no_access =
# access_times =
# cps = 50 10
# instances = UNLIMITED
# per_source = UNLIMITED
# max_load = 0
# deny_time = 120
# mdns = yes
# only_from =
# no_access =
# access_times =
# cps = 50 10
# instances = UNLIMITED
# per_source = UNLIMITED
# max_load = 0
# deny_time = 120
# mdns = yes
"time-dgram" 67L, 1148C 已寫入
[root@TRIXBOX1 xinetd.d]# vim time-stream
# This is the configuration for the tcp/stream time service.
service time
{
# This is for quick on or off of the service
disable = no
{
# This is for quick on or off of the service
disable = no
# The next attributes are mandatory for all services
id = time-stream
type = INTERNAL
wait = no
socket_type = stream
# protocol = socket type is usually enough
id = time-stream
type = INTERNAL
wait = no
socket_type = stream
# protocol = socket type is usually enough
# External services must fill out the following
# user =
# group =
# server =
# This is the configuration for the tcp/stream time service.
# user =
# group =
# server =
# This is the configuration for the tcp/stream time service.
service time
{
# This is for quick on or off of the service
disable = no
{
# This is for quick on or off of the service
disable = no
# The next attributes are mandatory for all services
id = time-stream
type = INTERNAL
wait = no
socket_type = stream
# protocol = socket type is usually enough
id = time-stream
type = INTERNAL
wait = no
socket_type = stream
# protocol = socket type is usually enough
# External services must fill out the following
# user =
# group =
# server =
# server_args =
# user =
# group =
# server =
# server_args =
# External services not listed in /etc/services must fill out the next one
# port =
# port =
# RPC based services must fill out these
# rpc_version =
# rpc_number =
# rpc_version =
# rpc_number =
# Logging options
# log_type =
# log_on_success =
# log_on_failure =
# log_type =
# log_on_success =
# log_on_failure =
# Networking options
# flags =
# bind =
# redirect =
# v6only =
# flags =
# bind =
# redirect =
# v6only =
# Access restrictions
# only_from =
# no_access =
# access_times =
# cps = 50 10
# instances = UNLIMITED
# per_source = UNLIMITED
# max_load = 0
# deny_time = 120
# mdns = yes
# only_from =
# no_access =
# access_times =
# cps = 50 10
# instances = UNLIMITED
# per_source = UNLIMITED
# max_load = 0
# deny_time = 120
# mdns = yes
"time-stream" 67L, 1149C 已寫入
查看37號端口是否打開,發現37號端口並沒有打開。
[root@TRIXBOX1 xinetd.d]# netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 284 192.168.6.55:22 192.168.6.60:58907 ESTABLISHED
udp 0 0 0.0.0.0:36879 0.0.0.0:*
udp 0 0 0.0.0.0:68 0.0.0.0:*
udp 0 0 0.0.0.0:5353 0.0.0.0:*
udp 0 0 0.0.0.0:111 0.0.0.0:*
udp 0 0 192.168.6.55:123 0.0.0.0:*
udp 0 0 127.0.0.1:123 0.0.0.0:*
udp 0 0 0.0.0.0:123 0.0.0.0:*
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 284 192.168.6.55:22 192.168.6.60:58907 ESTABLISHED
udp 0 0 0.0.0.0:36879 0.0.0.0:*
udp 0 0 0.0.0.0:68 0.0.0.0:*
udp 0 0 0.0.0.0:5353 0.0.0.0:*
udp 0 0 0.0.0.0:111 0.0.0.0:*
udp 0 0 192.168.6.55:123 0.0.0.0:*
udp 0 0 127.0.0.1:123 0.0.0.0:*
udp 0 0 0.0.0.0:123 0.0.0.0:*
啓動一下xinetd服務,再查看端口號,37號端口已經打開了。
[root@TRIXBOX1 xinetd.d]# /etc/init.d/xinetd start
啓動 xinetd: [確定]
[root@TRIXBOX1 xinetd.d]# netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:37 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 284 192.168.6.55:22 192.168.6.60:58907 ESTABLISHED
udp 0 0 0.0.0.0:36879 0.0.0.0:*
udp 0 0 0.0.0.0:37 0.0.0.0:*
udp 0 0 0.0.0.0:68 0.0.0.0:*
udp 0 0 0.0.0.0:5353 0.0.0.0:*
udp 0 0 0.0.0.0:111 0.0.0.0:*
udp 0 0 192.168.6.55:123 0.0.0.0:*
udp 0 0 127.0.0.1:123 0.0.0.0:*
udp 0 0 0.0.0.0:123 0.0.0.0:*
啓動 xinetd: [確定]
[root@TRIXBOX1 xinetd.d]# netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:37 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 284 192.168.6.55:22 192.168.6.60:58907 ESTABLISHED
udp 0 0 0.0.0.0:36879 0.0.0.0:*
udp 0 0 0.0.0.0:37 0.0.0.0:*
udp 0 0 0.0.0.0:68 0.0.0.0:*
udp 0 0 0.0.0.0:5353 0.0.0.0:*
udp 0 0 0.0.0.0:111 0.0.0.0:*
udp 0 0 192.168.6.55:123 0.0.0.0:*
udp 0 0 127.0.0.1:123 0.0.0.0:*
udp 0 0 0.0.0.0:123 0.0.0.0:*