求助指点ASA5520配置，谢谢

雪候鸟

     各位高手，我这里有一台web服务器地址为192.168.3.123，前面有一台ASA5520  inside口为 192.168.3.1，outside口为192.168.1.253，防火墙前面有一台路由器，ip为192.168.1.1， 因为防火墙后面只有一台web服务器，所以没有设置DMZ区，直接接到inside口上。
    现在配置后无法ping通192.168.1.253，也不能ping到192.168.1.1，外网也无法通过192.168.1.253访问到web服务器的网站，请指教 万分谢谢。    另外还想问下 要防DDOS攻击，还需要配置些什么？







ASA Version 8.2(5)
!
hostname ciscoasa
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface GigabitEthernet0/0
nameif guanli
security-level 100
ip address 192.168.4.1 255.255.255.0
!
interface GigabitEthernet0/1
nameif outside
security-level 0
ip address 192.168.1.253 255.255.255.0
!
interface GigabitEthernet0/2
nameif inside
security-level 100
ip address 192.168.3.1 255.255.255.0
!
interface GigabitEthernet0/3
shutdown
no nameif
no security-level
no ip address
!
interface Management0/0
nameif management
security-level 100
no ip address
management-only
!
ftp mode passive
access-list 101 extended permit ip any any
access-list 101 extended permit icmp any any
access-list 102 extended permit icmp any any
access-list 102 extended permit ip any any
pager lines 24
logging enable
logging asdm informational
mtu guanli 1500
mtu outside 1500
mtu inside 1500
mtu management 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
static (inside,outside) tcp 192.168.1.0 www 192.168.3.0 www netmask 255.255.255.
0
static (inside,outside) tcp interface www 192.168.3.253 www netmask 255.255.255.
255
access-group 101 in interface outside
access-group 102 in interface inside
route outside 0.0.0.0 0.0.0.0 192.168.1.1 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 192.168.1.0 255.255.255.0 management
http 192.168.4.0 255.255.255.0 guanli
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
telnet timeout 5
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
!
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
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:917701a3f5ff6a0df7eaaf2d88f41329
: end