谁帮我解析一下思科PIX525的配置啊

Destination

pix-sk# show run
: Saved
:
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname pix-sk
domain-name hzghj.gov.cn
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names         
access-list 100 permit ip 131.107.3.0 255.255.255.0 131.107.2.0 255.255.255.0
access-list 100 permit ip 131.107.3.0 255.255.255.0 192.168.1.0 255.255.255.252
access-list 100 permit ip 131.107.3.0 255.255.255.0 131.107.3.0 255.255.255.0
access-list 100 permit ip 131.107.3.0 255.255.255.0 131.107.5.0 255.255.255.0
pager lines 24
logging host outside 131.107.2.30
mtu outside 1500
mtu inside 1500
ip address outside 192.168.2.2 255.255.255.224
ip address inside 131.107.3.254 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
no failover
failover timeout 0:00:00
failover poll 15
no failover ip address outside
no failover ip address inside
pdm history enable
arp timeout 14400
global (outside) 1 192.168.3.23
nat (inside) 0 access-list 100
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
conduit permit icmp any any
route outside 0.0.0.0 0.0.0.0 192.168.2.1 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout sip-disconnect 0:02:00 sip-invite 0:03:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
http server enable
http 131.107.2.30 255.255.255.255 inside
no snmp-server location
no snmp-server contact
snmp-server community hzghj
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set ghj esp-3des esp-sha-hmac
crypto map vpn 20 ipsec-isakmp
crypto map vpn 20 match address 100
crypto map vpn 20 set peer 192.168.2.1
crypto map vpn 20 set transform-set ghj
crypto map vpn interface outside
isakmp enable outside
isakmp key ******** address 192.168.2.1 netmask 255.255.255.255
isakmp policy 1 authentication pre-share
isakmp policy 1 encryption 3des
isakmp policy 1 hash sha
isakmp policy 1 group 1
isakmp policy 1 lifetime 1000
telnet timeout 5
ssh 192.168.2.0 255.255.255.224 outside
ssh timeout 60
console timeout 0
dhcpd address 131.107.3.100-131.107.3.250 inside
dhcpd wins 131.107.2.50
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd enable inside
terminal width 80
Cryptochecksum:05693c3c23b060dbee729e0135e7a834
: end