我的问题是：我有一个 Cisco ASA，其INSIDE接口设置为DHCP租用 IP 10.1.10.104 - 254 ……我有一些静态服务器使用“较低”IP 范围（即10.1.10.11）。问题是任何“低于”的内容.104都被阻止访问除10.1.10.0. 它还被 NAT 规则阻止，尝试PPTP从OUTSIDE网络转发端口流量 IE 。我在下面包含了我的运行配置。
结果：输入接口：内部输入状态：向上输入线状态：向上输出接口：外部输出状态：向上输出线状态：向上动作：允许
ASA Version 8.2(5)
!
names
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
interface Vlan1
nameif inside
security-level 100
ip address 10.1.10.100 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address 74.xx.xx.xx 255.255.255.248
!
ftp mode passive
object-group network DM_INLINE_NETWORK_1
network-object 10.xx.xx.0 255.255.255.0
network-object 10.xx.xx.0 255.255.255.0
access-list outside_access_in extended permit icmp any any
access-list outside_1_cryptomap extended permit ip 10.1.10.0 255.255.255.0 object-group DM_INLINE_NETWORK_1
access-list inside_nat0_outbound extended permit ip 10.1.10.0 255.255.255.0 10.xx.xx.0 255.255.255.0
access-list inside_nat0_outbound extended permit ip 10.1.10.0 255.255.255.0 10.xx.xx.0 255.255.255.0
pager lines 24
logging asdm informational
mtu inside 1500
mtu outside 1500
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_nat0_outbound
nat (inside) 1 10.1.10.0 255.255.255.0
route outside 0.0.0.0 0.0.0.0 74.xx.xx.xx 1
timeout xlate 3:00:00
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
http server enable
http 10.1.10.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac
crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac
crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac
crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto map outside_map 1 match address outside_1_cryptomap
crypto map outside_map 1 set pfs group5
crypto map outside_map 1 set peer xx.xx.xx.xx
crypto map outside_map 1 set transform-set ESP-3DES-SHA
crypto map outside_map interface outside
crypto isakmp enable inside
crypto isakmp enable outside
crypto isakmp policy 10
authentication crack
encryption aes-256
hash sha
group 2
lifetime 86400
crypto isakmp policy 20
authentication rsa-sig
encryption aes-256
hash sha
group 2
lifetime 86400
crypto isakmp policy 30
authentication pre-share
encryption aes-256
hash sha
group 2
lifetime 86400
crypto isakmp policy 40
authentication crack
encryption aes-192
hash sha
group 2
lifetime 86400
crypto isakmp policy 50
authentication rsa-sig
encryption aes-192
hash sha
group 2
lifetime 86400
crypto isakmp policy 60
authentication pre-share
encryption aes-192
hash sha
group 2
lifetime 86400
crypto isakmp policy 70
authentication crack
encryption aes
hash sha
group 2
lifetime 86400
crypto isakmp policy 80
authentication rsa-sig
encryption aes
hash sha
group 2
lifetime 86400
crypto isakmp policy 90
authentication pre-share
encryption aes
hash sha
group 2
lifetime 86400
crypto isakmp policy 100
authentication crack
encryption 3des
hash sha
group 2
lifetime 86400
crypto isakmp policy 110
authentication rsa-sig
encryption 3des
hash sha
group 2
lifetime 86400
crypto isakmp policy 120
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
crypto isakmp policy 130
authentication crack
encryption des
hash sha
group 2
lifetime 86400
crypto isakmp policy 140
authentication rsa-sig
encryption des
hash sha
group 2
lifetime 86400
crypto isakmp policy 150
authentication pre-share
encryption des
hash sha
group 2
lifetime 86400
crypto isakmp policy 170
authentication pre-share
encryption 3des
hash sha
group 5
lifetime 86400
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd dns 75.75.75.75 75.75.76.76
dhcpd auto_config outside
!
dhcpd address 10.1.10.104-10.1.10.254 inside
dhcpd enable inside
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
tunnel-group xx.xx.xx.xx type ipsec-l2l
tunnel-group xx.xx.xx.xx ipsec-attributes
pre-shared-key xx
!
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 pptp
inspect icmp
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
: end
有什么我明显缺少的吗？我是网络菜鸟，所以请记住这一点，如果需要更多信息等，请通知我...为简单起见，让我们使用单个 IP10.1.10.11作为“问题”IP。
＃＃＃＃＃＃＃＃＃＃＃＃＃编辑＃＃＃＃＃＃＃＃＃＃＃＃
我traceroute从下面的答案中添加了一个建议。我再次重申，我是一个菜鸟，所以要温柔。
Result of the command: "packet-tracer input inside tcp 10.1.10.11 80 75.75.75.75 80"
Phase: 1
Type: ROUTE-LOOKUP
Subtype: input
Result: ALLOW
Config:
Additional Information:
in 0.0.0.0 0.0.0.0 outside
Phase: 2
Type: IP-OPTIONS
Subtype:
Result: ALLOW
Config:
Additional Information:
Phase: 3
Type: VPN
Subtype: ipsec-tunnel-flow
Result: ALLOW
Config:
Additional Information:
Phase: 4
Type: NAT
Subtype:
Result: ALLOW
Config:
nat (inside) 1 10.1.10.0 255.255.255.0
match ip inside 10.1.10.0 255.255.255.0 outside any
dynamic translation to pool 1 (74.xx.xx.225 [Interface PAT])
translate_hits = 841385, untranslate_hits = 182888
Additional Information:
Dynamic translate 10.1.10.11/80 to 74.xx.Xx.225/120 using netmask 255.255.255.255
Phase: 5
Type: NAT
Subtype: host-limits
Result: ALLOW
Config:
nat (inside) 1 10.1.10.0 255.255.255.0
match ip inside 10.1.10.0 255.255.255.0 inside any
dynamic translation to pool 1 (No matching global)
translate_hits = 0, untranslate_hits = 0
Additional Information:
Phase: 6
Type: IP-OPTIONS
Subtype:
Result: ALLOW
Config:
Additional Information:
Phase: 7
Type: FLOW-CREATION
Subtype:
Result: ALLOW
Config:
Additional Information:
New flow created with id 1635639, packet dispatched to next module
然而
这失败了：
Result of the command: "packet-tracer input outside icmp 75.75.75.75 0 0 10.1.10.11 detailed"
Phase: 1
Type: ROUTE-LOOKUP
Subtype: input
Result: ALLOW
Config:
Additional Information:
in 10.1.10.0 255.255.255.0 inside
Phase: 2
Type: ACCESS-LIST
Subtype:
Result: DROP
Config:
Implicit Rule
Additional Information:
Forward Flow based lookup yields rule:
in id=0xc95e4128, priority=0, domain=permit, deny=true
hits=343309, user_data=0x9, cs_id=0x0, flags=0x1000, protocol=0
src ip=0.0.0.0, mask=0.0.0.0, port=0
dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0
Result:
input-interface: outside
input-status: up
input-line-status: up
output-interface: inside
output-status: up
output-line-status: up
Action: drop
Drop-reason: (acl-drop) Flow is denied by configured rule