[c-nsp] unable to ping from some source IP

[Jimmy Halim]

Hi guys,
 
I have a very strange issue encountered.
I am not able to ping to one of customer's WAN IP (203.192.163.162) from
some source IP.
I am 100% sure that is nothing filtering it from our side.
 
Anything wrong prohibiting it from below customer router's config?
 
Cheers,
Jimmy
 
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Current configuration : 1340 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug datetime
service timestamps log datetime localtime
service password-encryption
!
hostname PAC_3640
!
no logging rate-limit
no logging monitor
!
clock timezone gmt 8
ip subnet-zero
!
!
no ip finger
no ip domain-lookup
!
call rsvp-sync
!         
!
!
interface FastEthernet1/0
 ip address 122.152.143.225 255.255.255.224
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 no keepalive
 speed 100
 full-duplex
 no cdp enable
!
interface Serial1/0               ----------------------> WAN Interface
 bandwidth 2048
 ip address 203.192.163.162 255.255.255.252
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 fair-queue
 no cdp enable
!
no ip classless
ip route 0.0.0.0 0.0.0.0 203.192.163.161
no ip http server
!
no cdp run
!         
dial-peer cor custom

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