level 1
wei23860572
楼主
问题是这样的，请看图：
现在呢，如果是按下图的连接方法，那么PC1就访问不了应用服务器1，但是可以访问应用服务器2，（这里解释下，应用服务器必须得连接到数据库才能正常访问，也就是说如果没有应用服务器没有连接到数据库服务器是不能正常访问的），ping是可以ping得通的，延时小于1ms，我在交换机和防火墙都没有做任何的阻止策略或ACL；还有当“应用服务器1”的IP修改成18网段的就能正常访问了。
还有就是如果将防火墙去掉，（也就是核心与服务器集群的交换机直接相连），这时 应用服务器1 又能正常访问了（不管是20网段还是18网段）。
再附上juniper 防火墙的配置文件 ：帮忙看看 谢谢unset key protection enable
set clock timezone 0
set vrouter trust-vr sharable
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset auto-route-export
exit
set alg appleichat enable
unset alg appleichat re-assembly enable
set alg sctp enable
set auth-server "Local" id 0
set auth-server "Local" server-name "Local"
set auth default auth server "Local"
set auth radius accounting port 1646
set admin name "netscreen"
set admin password "nKVUM2rwMUzPcrkG5sWIHdCtqkAibn"
set admin auth web timeout 10
set admin auth server "Local"
set admin format dos
set zone "Trust" vrouter "trust-vr"
set zone "Untrust" vrouter "trust-vr"
set zone "DMZ" vrouter "trust-vr"
set zone "VLAN" vrouter "trust-vr"
set zone "Untrust-Tun" vrouter "trust-vr"
set zone "Trust" tcp-rst
set zone "Untrust" block
unset zone "Untrust" tcp-rst
set zone "MGT" block
unset zone "V1-Trust" tcp-rst
unset zone "V1-Untrust" tcp-rst
set zone "DMZ" tcp-rst
unset zone "V1-DMZ" tcp-rst
unset zone "VLAN" tcp-rst
set zone "Untrust" screen tear-drop
set zone "Untrust" screen syn-flood
set zone "Untrust" screen ping-death
set zone "Untrust" screen ip-filter-src
set zone "Untrust" screen land
set zone "V1-Untrust" screen tear-drop
set zone "V1-Untrust" screen syn-flood
set zone "V1-Untrust" screen ping-death
set zone "V1-Untrust" screen ip-filter-src
set zone "V1-Untrust" screen land
set interface "ethernet0/0" zone "V1-Trust"
set interface "ethernet0/1" zone "DMZ"
set interface "ethernet0/2" zone "V1-Untrust"
set interface vlan1 ip 192.168.1.250/24
set interface "vlan1" pmtu ipv4
set interface vlan1 vlan trunk
unset interface vlan1 bypass-others-ipsec
unset interface vlan1 bypass-non-ip
set interface vlan1 ip manageable
set zone V1-Untrust manage ping
set zone V1-Untrust manage telnet
set zone V1-Untrust manage web
unset flow no-tcp-seq-check
set flow tcp-syn-check
unset flow tcp-syn-bit-check
set flow reverse-route clear-text prefer
set flow reverse-route tunnel always
set pki authority default scep mode "auto"
set pki x509 default cert-path partial
set crypto-policy
exit
set ike respond-bad-spi 1
set ike ikev2 ike-sa-soft-lifetime 60
unset ike ikeid-enumeration
unset ike dos-protection
unset ipsec access-session enable
set ipsec access-session maximum 5000
set ipsec access-session upper-threshold 0
set ipsec access-session lower-threshold 0
set ipsec access-session dead-p2-sa-timeout 0
unset ipsec access-session log-error
unset ipsec access-session info-exch-connected
unset ipsec access-session use-error-log
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit
set url protocol websense
exit
set anti-spam profile ns-profile
set sbl default-server enable
exit
set policy id 1 from "V1-Untrust" to "V1-Trust" "Any" "Any" "ANY" permit
set policy id 1
exit
set policy id 2 from "V1-Trust" to "V1-Untrust" "Any" "Any" "ANY" permit
set policy id 2
exit
set nsmgmt bulkcli reboot-timeout 60
set ssh version v2
set config lock timeout 5
unset license-key auto-update
set telnet client enable
set snmp port listen 161
set snmp port trap 162
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
unset add-default-route
set route 0.0.0.0/0 gateway 192.168.1.254
exit
set vrouter "untrust-vr"
exit
set vrouter "trust-vr"
exit
