CIsco ASA 5505 v9.1 - NAT/ACL发布非军事区

Question

我有一个和这个问题中描述的完全相同的问题：思科ASA 5505 DMZ安装问题

然而，韦弗的最高投票的答案并没有解决我的问题，所以我再次问了一下社会。我非常仔细地跟踪了他的答案，但是在RPF检查中，数据包跟踪测试失败了：

packet-tracer input Outside tcp 1.1.1.1 12345 10.0.0.2 22

阶段:6类型: nat子类型:rpf-检查结果:下拉Config:对象网络主机-10.0.0.2- tcp 22 NAT (实验室，外部)静态接口服务tcp ssh ssh附加信息:结果:输入-接口:外部输入-状态:向上输入-行-状态:实验室输出-状态:向上输出-行-状态:向上操作:下降-原因：(acl- drop )流被配置规则拒绝。

如何通过RPF检查？我读过很多关于配置NAT的Cisco文档，但是没有一个能解决我的问题。

#sh run
: Saved
:
ASA Version 9.1(3)
!
hostname [omitted]
domain-name [omitted]
enable password [omitted] encrypted
passwd [omitted] encrypted
names
!
interface Ethernet0/0
!
interface Ethernet0/1
 switchport access vlan 2
!
interface Ethernet0/2
 switchport access vlan 2
!
interface Ethernet0/3
 switchport access vlan 3
!
interface Ethernet0/4
 switchport access vlan 3
!
interface Ethernet0/5
 switchport access vlan 3
!
interface Ethernet0/6
 switchport access vlan 3
!
interface Ethernet0/7
 switchport access vlan 3
!
interface Vlan1
 description OUTSIDE
 mac-address [omitted]
 nameif Outside
 security-level 0
 ip address dhcp setroute
!
interface Vlan2
 description HOME LAN
 nameif Home
 security-level 100
 ip address 192.168.1.1 255.255.255.0
!
interface Vlan3
 description LAB
 no forward interface Vlan2
 nameif Lab
 security-level 50
 ip address 10.0.0.1 255.255.255.0
!
ftp mode passive
clock timezone [omitted]
dns domain-lookup Outside
dns server-group DefaultDNS
 name-server 8.8.8.8
 name-server 8.8.4.4
 domain-name sylvarant
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
object network OBJ_INTERNAL_ALL
 subnet 0.0.0.0 0.0.0.0
object network Home-subnet
 subnet 192.168.1.0 255.255.255.0
 description PENDING - For use as Home LAN obj when Internet is available to modify
object network lab-subnet
 subnet 10.0.0.0 255.255.255.0
object network external-ip
 host [omitted]
object service SSH
 service tcp source eq ssh
object network host-10.0.0.2
 host 10.0.0.2
 description Lab Splunk server
object network host-10.0.0.2-tcp22
 host 10.0.0.2
 description Lab Splunk server SSH
object-group service svcgrp-10.0.0.2-tcp tcp
 port-object eq ssh
access-list Home_in extended permit icmp any any echo log
access-list outside_access_in extended permit tcp any object host-10.0.0.2 object-group svcgrp-10.0.0.2-tcp
access-list Lab_access_in extended deny ip any any
pager lines 24
logging enable
logging timestamp
logging asdm informational
mtu Outside 1500
mtu Home 1500
mtu Lab 1500
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
nat (Home,Outside) source dynamic any interface description PAT for HOME network
!
object network lab-subnet
 nat (Lab,Outside) dynamic interface
object network host-10.0.0.2-tcp22
 nat (Lab,Outside) static interface service tcp ssh ssh
access-group outside_access_in in interface Outside
route Home 192.168.0.0 255.255.255.0 192.168.1.2 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
aaa authentication ssh console LOCAL
http server enable
http 192.168.1.0 255.255.255.0 Home
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
crypto ipsec security-association pmtu-aging infinite
crypto ca trustpool policy
telnet timeout 5
ssh 192.168.1.0 255.255.255.0 Home
ssh timeout 60
ssh version 2
ssh key-exchange group dh-group1-sha1
console timeout 0

dhcpd address 192.168.1.2-192.168.1.33 Home
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server 129.6.15.30 source Outside prefer
username [omitted] password [omitted] encrypted
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum client auto
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect rsh
  inspect rtsp
  inspect esmtp
  inspect sqlnet
  inspect skinny
  inspect sunrpc
  inspect xdmcp
  inspect sip
  inspect netbios
  inspect tftp
  inspect ip-options
  inspect icmp
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
password encryption aes
Cryptochecksum:bbf2ff9baaf19bb46d6adec26d8db9c6
: end

数据包- tcp 1.1.1.1 12345 我的公共知识产权 22:

外的跟踪器输入

Phase: 3
Type: ACCESS-LIST
Subtype:
Result: DROP
Config:
Implicit Rule
Additional Information:

Result:
input-interface: Outside
input-status: up
input-line-status: up
output-interface: NP Identity Ifc
output-status: up
output-line-status: up
Action: drop
Drop-reason: (acl-drop) Flow is denied by configured rule

sh nat:

#sh nat
Manual NAT Policies (Section 1)
1 (Home) to (Outside) source dynamic any interface   description PAT for HOME network
    translate_hits = 6922, untranslate_hits = 2

Auto NAT Policies (Section 2)
1 (Lab) to (Outside) source static host-10.0.0.2-tcp22 interface   service tcp ssh ssh
    translate_hits = 0, untranslate_hits = 0
2 (Lab) to (Outside) source dynamic lab-subnet interface
    translate_hits = 0, untranslate_hits = 0

Answer 1

啊，好老asa 5500系列，变化多端的小玩意。

据我所见，你的acl有点差

access-list Home_in extended permit icmp any any echo log
access-list outside_access_in extended permit tcp any object host-10.0.0.2 object-group svcgrp-10.0.0.2-tcp
access-list Lab_access_in extended deny ip any any ***

似乎您没有在Lab10.0.0.0.x接口上为它配置入站规则

尝试添加以下规则Lab：

access-list lab_access_in extended permit tcp ssh  host-10.0.0.2 

或通过asdm (基本上允许实验室acl上的任何主机在端口22上访问10.0.0.2 )