راهنمایی در مورد nat

سلام
دوستان عزیز لطفا ببنید این کانفیگ برای nat درست است یا خیر ؟

Current configuration : 5084 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
aaa new-model
aaa authentication login default local group tacacs+
aaa authentication login no_tacacs enable
aaa authentication ppp default local group tacacs+
aaa accounting exec default start-stop group tacacs+
aaa accounting network default start-stop group tacacs+
enable password 555
!
username 8888 privilege 15 password 0 8888
spe 1/0 1/9
firmware location system:/ucode/mica_port_firmware
!
!
resource-pool disable
!
ip subnet-zero
ip name-server 217.218.155.104
ip name-server 217.218.127.104
ip name-server 217.218.155.105
!
!
controller E1 0
framing NO-CRC4
clock source line primary
ds0-group 1 timeslots 1-15,17-31 type r2-digital
cas-custom 1
!
controller E1 1
clock source line secondary 1
!
controller E1 2
clock source line secondary 2
!
controller E1 3
clock source line secondary 3
!
controller E1 4
clock source line secondary 4
!
controller E1 5
clock source line secondary 5
!
controller E1 6
clock source line secondary 6
!
controller E1 7
clock source line secondary 7
!
!
!
interface Ethernet0
no ip address
no ip route-cache
no ip mroute-cache
shutdown
!
interface Serial0
no ip address
no ip route-cache
no ip mroute-cache
shutdown
no fair-queue
clockrate 2015232
!
interface Serial1
no ip address
no ip route-cache
no ip mroute-cache
shutdown
no fair-queue
clockrate 2015232
!
interface Serial2
no ip address
no ip route-cache
no ip mroute-cache
shutdown
no fair-queue
clockrate 2015232
!
interface Serial3
no ip address
no ip route-cache
no ip mroute-cache
shutdown
no fair-queue
clockrate 2015232
!
interface FastEthernet0
ip address 172.20.1.2 255.255.255.0 secondary
ip address 78.39.x. 255.255.255.240 secondary
ip address 192.168.254.251 255.255.255.0
ip nat inside
no ip route-cache
no ip mroute-cache
duplex auto
speed auto
!
interface Group-Async0
ip unnumbered FastEthernet0
ip nat outside
encapsulation ppp
no ip route-cache
ip tcp header-compression
no ip mroute-cache
async mode interactive
peer default ip address pool e1
ppp authentication pap chap
group-range 1 120
!
ip local pool e1 172.20.1.10 172.20.1.50
ip nat pool e1 78.39.x.x 78.39.x.x netmask 255.255.255.240
ip nat inside source list 101 pool e1 overload
ip classless
ip route 0.0.0.0 0.0.0.0 172.20.1.1
no ip http server
!
access-list 50 permit 192.168.254.200
access-list 50 permit 192.168.254.253
access-list 101 permit ip 172.20.1.0 0.0.0.127 any
access-list 115 deny tcp any any range 3127 3198
access-list 115 deny tcp any range 3127 3198 any
access-list 115 deny icmp any any echo
access-list 115 deny icmp any any echo-reply
access-list 115 deny tcp any any range 133 139
access-list 115 deny tcp any range 133 139 any
access-list 115 deny udp any any range 133 netbios-ss
access-list 115 deny udp any range 133 netbios-ss any
access-list 115 deny tcp any any eq 445
access-list 115 deny tcp any eq 445 any
access-list 115 deny udp any any eq tftp
access-list 115 deny udp any eq tftp any
access-list 115 deny udp any any eq 593
access-list 115 deny udp any eq 593 any
access-list 115 deny tcp any any eq 593
access-list 115 deny tcp any eq 593 any
access-list 115 deny tcp any any eq 4444
access-list 115 deny tcp any eq 4444 any
access-list 115 deny udp any eq 3333 any
access-list 115 deny udp any any eq 3333
access-list 115 deny udp any any range 666 765
access-list 115 deny udp any range 666 765 any
access-list 115 deny udp any eq ntp any
access-list 115 deny udp any any eq ntp
access-list 115 deny udp any eq 8998 any
access-list 115 deny udp any any eq 8998
access-list 115 deny udp any any range 995 999
access-list 115 deny udp any range 995 999 any
access-list 115 deny tcp any eq 3333 any
access-list 115 deny tcp any any eq 3333
access-list 115 deny tcp any any range 666 765
access-list 115 deny tcp any range 666 765 any
access-list 115 deny tcp any eq 123 any
access-list 115 deny tcp any any eq 123
access-list 115 deny tcp any eq 8998 any
access-list 115 deny tcp any any eq 8998
access-list 115 deny tcp any any range 995 999
access-list 115 deny tcp any range 995 999 any
access-list 115 deny udp any any eq 1433
access-list 115 deny udp any any eq 1434
access-list 115 deny tcp any any eq 1433
access-list 115 deny tcp any any eq 1434
access-list 115 permit ip any any
route-map cache permit 10
match ip address 101
set ip next-hop 172.20.1.1
!
tacacs-server host 192.168.254.253
snmp-server community reza123 RW
!
line con 0
line 1 120
session-timeout 30
exec-timeout 0 0
no flush-at-activation
absolute-timeout 480
modem Dialin
autocommand ppp
transport preferred none
transport input all
transport output none
autoselect ppp
line aux 0
line vty 0 4
access-class 50 in
exec-timeout 0 0
password 444
transport preferred none
transport input pad telnet rlogin udptn
transport output pad telnet rlogin udptn
!
end



ممنون میشم بگید اشکالش کجاست

در group-async
ip nat inside
و در fast
ip nat outside
وارد کنید

جناب احمدی زاده

تنظیماتی که گفتید رو انجام دادم ولی وقتی کش خودم که ایزا است رو از مدار خارج کنم اینترنت از یوزرها قطع میشه و دیگه اینترنت ندارد

برای ByPass کردن Cache ، روی Group-async دستور no ip policy route-map cache را هم بزنید

جناب اقای حکیمی ممنون درست شد

ای بابا گیر دادید به حکیمی
برای کش هم که حدمتتون گفتم route رو عوض کنید

شرمنده ببخشید
من هم حتی شماره شما رو تو گوشی خودم به اسم حکیمی نوشتم
همش تقصیر مهندس علوی هست
یادم میمونه جناب احمدی زاده
ممنون