同一筐体上にZabbixサーバとZabbixエージェントを稼働させておりますが、
通信ができません。

初期状態では通信できていたのですが、
初期状態ではfpingが送信できないため、設定を変更したところ
fpingは飛ぶようになったのですが、
逆にZabbixサーバとZabbixエージェント間の通信ができなくなりました。
設定を確認したのですが、原因となるところわからないため、
設定誤りの箇所をご教授いただけませんでしょうか。

↓設定ファイル
[root@localhost ~]# cat /etc/zabbix/zabbix_server.conf
# This is a configuration file for Zabbix Server process
# To get more information about Zabbix,
# visit http://www.zabbix.com

############ GENERAL PARAMETERS #################

### Option: NodeID
# Unique NodeID in distributed setup.
# 0 - standalone server
#
# Mandatory: no
# Range: 0-999
# Default:
# NodeID=0

### Option: ListenPort
# Listen port for trapper.
#
# Mandatory: no
# Range: 1024-32767
# Default:
ListenPort=10051

### Option: SourceIP
# Source IP address for outgoing connections.
#
# Mandatory: no
# Default:
SourceIP=10.168.17.101

### Option: LogFile
# Name of log file.
# If not set, syslog is used.
#
# Mandatory: no
# Default:
# LogFile=

LogFile=/var/log/zabbix/zabbix_server.log

### Option: LogFileSize
# Maximum size of log file in MB.
# 0 - disable automatic log rotation.
#
# Mandatory: no
# Range: 0-1024
# Default:
# LogFileSize=1

LogFileSize=0

### Option: DebugLevel
# Specifies debug level
# 0 - no debug
# 1 - critical information
# 2 - error information
# 3 - warnings
# 4 - for debugging (produces lots of information)
#
# Mandatory: no
# Range: 0-4
# Default:
# DebugLevel=3

### Option: PidFile
# Name of PID file.
#
# Mandatory: no
# Default:
# PidFile=/tmp/zabbix_server.pid

PidFile=/var/run/zabbix/zabbix_server.pid

### Option: DBHost
# Database host name.
# If set to localhost, socket is used for MySQL.
#
# Mandatory: no
# Default:
DBHost=Zabbix server

### Option: DBName
# Database name.
# For SQLite3 path to database file must be provided. DBUser and DBPassword are ignored.
#
# Mandatory: yes
# Default:
# DBName=

DBName=zabbix

### Option: DBSchema
# Schema name. Used for IBM DB2.
#
# Mandatory: no
# Default:
# DBSchema=

### Option: DBUser
# Database user. Ignored for SQLite.
#
# Mandatory: no
# Default:
# DBUser=

DBUser=zabbix

### Option: DBPassword
# Database password. Ignored for SQLite.
# Comment this line if no password is used.
#
# Mandatory: no
# Default:

DBPassword=zabbixpassword

### Option: DBSocket
# Path to MySQL socket.
#
# Mandatory: no
# Default:
# DBSocket=/tmp/mysql.sock

DBSocket=/var/lib/mysql/mysql.sock

### Option: DBPort
# Database port when not using local socket. Ignored for SQLite.
#
# Mandatory: no
# Range: 1024-65535
# Default (for MySQL):
# DBPort=3306

############ ADVANCED PARAMETERS ################

### Option: StartPollers
# Number of pre-forked instances of pollers.
#
# Mandatory: no
# Range: 0-1000
# Default:
# StartPollers=5

### Option: StartIPMIPollers
# Number of pre-forked instances of IPMI pollers.
#
# Mandatory: no
# Range: 0-1000
# Default:
# StartIPMIPollers=0

### Option: StartPollersUnreachable
# Number of pre-forked instances of pollers for unreachable hosts (including IPMI).
#
# Mandatory: no
# Range: 0-1000
# Default:
# StartPollersUnreachable=1

### Option: StartTrappers
# Number of pre-forked instances of trappers.
#
# Mandatory: no
# Range: 0-1000
# Default:
# StartTrappers=5

### Option: StartPingers
# Number of pre-forked instances of ICMP pingers.
#
# Mandatory: no
# Range: 0-1000
# Default:
# StartPingers=1

### Option: StartDiscoverers
# Number of pre-forked instances of discoverers.
#
# Mandatory: no
# Range: 0-250
# Default:
# StartDiscoverers=1

### Option: StartHTTPPollers
# Number of pre-forked instances of HTTP pollers.
#
# Mandatory: no
# Range: 0-1000
# Default:
# StartHTTPPollers=1

### Option: ListenIP
# List of comma delimited IP addresses that the trapper should listen on.
# Trapper will listen on all network interfaces if this parameter is missing.
#
# Mandatory: no
# Default:
# ListenIP=0.0.0.0

ListenIP=127.0.0.1

### Option: HousekeepingFrequency
# How often Zabbix will perform housekeeping procedure (in hours).
# Housekeeping is removing unnecessary information from history, alert, and alarms tables.
#
# Mandatory: no
# Range: 1-24
# Default:
# HousekeepingFrequency=1

### Option: MaxHousekeeperDelete
# The table "housekeeper" contains "tasks" for housekeeping procedure in the format:
# [housekeeperid], [tablename], [field], [value].
# No more than 'MaxHousekeeperDelete' rows (corresponding to [tablename], [field], [value])
# will be deleted per one task in one housekeeping cycle.
# SQLite3 does not use this parameter, deletes all corresponding rows without a limit.
# If set to 0 then no limit is used at all. In this case you must know what you are doing!
#
# Mandatory: no
# Range: 0-1000000
# Default:
# MaxHousekeeperDelete=500

### Option: DisableHousekeeping
# If set to 1, disables housekeeping.
#
# Mandatory: no
# Range: 0-1
# Default:
# DisableHousekeeping=0

### Option: SenderFrequency
# How often Zabbix will try to send unsent alerts (in seconds).
#
# Mandatory: no
# Range: 5-3600
# Default:
# SenderFrequency=30

### Option: CacheSize
# Size of configuration cache, in bytes.
# Shared memory size for storing hosts and items data.
#
# Mandatory: no
# Range: 128K-1G
# Default:
# CacheSize=8M

### Option: CacheUpdateFrequency
# How often Zabbix will perform update of configuration cache, in seconds.
#
# Mandatory: no
# Range: 1-3600
# Default:
# CacheUpdateFrequency=60

### Option: StartDBSyncers
# Number of pre-forked instances of DB Syncers
#
# Mandatory: no
# Range: 1-100
# Default:
# StartDBSyncers=4

### Option: HistoryCacheSize
# Size of history cache, in bytes.
# Shared memory size for storing history data.
#
# Mandatory: no
# Range: 128K-1G
# Default:
# HistoryCacheSize=8M

### Option: TrendCacheSize
# Size of trend cache, in bytes.
# Shared memory size for storing trends data.
#
# Mandatory: no
# Range: 128K-1G
# Default:
# TrendCacheSize=4M

### Option: HistoryTextCacheSize
# Size of text history cache, in bytes.
# Shared memory size for storing character, text or log history data.
#
# Mandatory: no
# Range: 128K-1G
# Default:
# HistoryTextCacheSize=16M

### Option: NodeNoEvents
# If set to '1' local events won't be sent to master node.
# This won't impact ability of this node to propagate events from its child nodes.
#
# Mandatory: no
# Range: 0-1
# Default:
# NodeNoEvents=0

### Option: NodeNoHistory
# If set to '1' local history won't be sent to master node.
# This won't impact ability of this node to propagate history from its child nodes.
#
# Mandatory: no
# Range: 0-1
# Default:
# NodeNoHistory=0

### Option: Timeout
# Specifies how long we wait for agent, SNMP device or external check (in seconds).
#
# Mandatory: no
# Range: 1-30
# Default:
# Timeout=3

### Option: TrapperTimeout
# Specifies how many seconds trapper may spend processing new data.
#
# Mandatory: no
# Range: 1-300
# Default:
# TrapperTimeout=300

### Option: UnreachablePeriod
# After how many seconds of unreachability treat a host as unavailable.
#
# Mandatory: no
# Range: 1-3600
# Default:
UnreachablePeriod=45

### Option: UnavailableDelay
# How often host is checked for availability during the unavailability period, in seconds.
#
# Mandatory: no
# Range: 1-3600
# Default:
UnavailableDelay=60

### Option: UnreachableDelay
# How often host is checked for availability during the unreachability period, in seconds.
#
# Mandatory: no
# Range: 1-3600
# Default:
# UnreachableDelay=15

### Option: AlertScriptsPath
# Location of custom alert scripts
#
# Mandatory: no
# Default:
# AlertScriptsPath=/home/zabbix/bin/

AlertScriptsPath=/etc/zabbix/alertscripts

### Option: ExternalScripts
# Location of external scripts
#
# Mandatory: no
# Default:
# ExternalScripts=/etc/zabbix/externalscripts

ExternalScripts=/etc/zabbix/externalscripts

### Option: FpingLocation
# Location of fping.
# Make sure that fping binary has root ownership and SUID flag set.
#
# Mandatory: no
# Default:
FpingLocation=/usr/sbin/fping

### Option: Fping6Location
# Location of fping6.
# Make sure that fping6 binary has root ownership and SUID flag set.
# Make empty if your fping utility is capable to process IPv6 addresses.
#
# Mandatory: no
# Default:
# Fping6Location=/usr/sbin/fping6

### Option: SSHKeyLocation
# Location of public and private keys for SSH checks
#
# Mandatory: no
# Default:
# SSHKeyLocation=

### Option: LogSlowQueries
# How long a database query may take before being logged (in milliseconds).
# 0 - don't log slow queries.
#
# Mandatory: no
# Range: 1-3600000
# Default:
# LogSlowQueries=0

### Option: TmpDir
# Temporary directory.
#
# Mandatory: no
# Default:
# TmpDir=/tmp

### Option: Include
# You may include individual files or all files in a directory in the configuration file.
#
# Mandatory: no
# Default:
# Include=

# Include=/etc/zabbix/zabbix_server.general.conf
# Include=/etc/zabbix/zabbix_server/

### Option: StartProxyPollers
# Number of pre-forked instances of pollers for passive proxies.
#
# Mandatory: no
# Range: 0-250
# Default:
# StartProxyPollers=1

### Option: ProxyConfigFrequency
# How often Zabbix Server sends configuration data to a Zabbix Proxy in seconds.
# This parameter is used only for proxies in the passive mode.
#
# Mandatory: no
# Range: 1-3600*24*7
# Default:
# ProxyConfigFrequency=3600

### Option: ProxyDataFrequency
# How often Zabbix Server requests history data from a Zabbix Proxy in seconds.
# This parameter is used only for proxies in the passive mode.
#
# Mandatory: no
# Range: 1-3600
# Default:
# ProxyDataFrequency=1
[root@localhost ~]#
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[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# cat /etc/zabbix/zabbix_agent.conf
# This is a config file for zabbix_agent
# To get more information about Zabbix visit http://www.zabbix.com

### Option: Server
# IP address of Zabbix server
# Connections from other hosts will be denied
# If IPv6 support is enabled then '127.0.0.1', '::127.0.0.1', '::ffff:127.0.0.1' are treated equally.
#
# Mandatory: yes
# Default:
# Server=

Server='127.0.0.1'

############ ADVANCED PARAMETERS #################

### Option: Alias
# Sets an alias for parameter. It can be useful to substitute long and complex parameter name with a smaller and simpler one.
#
# Mandatory: no
# Range:
# Default:

### Option: Timeout
# Spend no more than Timeout seconds on processing
#
# Mandatory: no
# Range: 1-30
# Default:
# Timeout=3

### Option: Include
# You may include individual files or all files in a directory in the configuration file.
#
# Mandatory: no
# Default:
# Include=

# Include=/etc/zabbix/zabbix_agentd.userparams.conf
# Include=/etc/zabbix/zabbix_agentd/

####### USER-DEFINED MONITORED PARAMETERS #######

### Option: UnsafeUserParameters
# Allow all characters to be passed in arguments to user-defined parameters.
# 0 - do not allow
# 1 - allow
#
# Mandatory: no
# Default:
# UnsafeUserParameters=0

### Option: UserParameter
# User-defined parameter to monitor. There can be several user-defined parameters.
# Format: UserParameter=,
# Note that shell command must not return empty string or EOL only.
# Example: UserParameter=system.test,who|wc -l
#UserParameter=system.test,who|wc -l
### Set of parameters for monitoring MySQL server (v3.23.42 and later)
### Change -u and add -p if required
#UserParameter=mysql.ping,mysqladmin -uroot ping|grep alive|wc -l
#UserParameter=mysql.uptime,mysqladmin -uroot status|cut -f2 -d":"|cut -f1 -d"T"
#UserParameter=mysql.threads,mysqladmin -uroot status|cut -f3 -d":"|cut -f1 -d"Q"
#UserParameter=mysql.questions,mysqladmin -uroot status|cut -f4 -d":"|cut -f1 -d"S"
#UserParameter=mysql.slowqueries,mysqladmin -uroot status|cut -f5 -d":"|cut -f1 -d"O"
#UserParameter=mysql.qps,mysqladmin -uroot status|cut -f9 -d":"
#UserParameter=mysql.version,mysql -V

#Hostname='Zabbix server'
#ListenIP='127.0.0.1'

[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# cat /etc/zabbix/zabbix.conf.php
<?php
// Zabbix GUI configuration file
global $DB;

$DB["TYPE"] = 'MYSQL';
$DB["SERVER"] = '127.0.0.1';
$DB["PORT"] = '0';
$DB["DATABASE"] = 'zabbix';
$DB["USER"] = 'zabbix';
$DB["PASSWORD"] = 'zabbixpassword';
// SCHEMA is relevant only for IBM_DB2 database
$DB["SCHEMA"] = '';

$ZBX_SERVER = '127.0.0.1';
$ZBX_SERVER_PORT = '10051';
$ZBX_SERVER_NAME = 'Zabbix server';

$IMAGE_FORMAT_DEFAULT = IMAGE_FORMAT_PNG;
?>
[root@localhost ~]#