hi guys,i am fairly new to firewall pls help in opening port

have configured and put on my live network the problem is i am getting internet conn very slow i mean some packets are droping and internal servers are getting packets from outside servers(from another n/ws).I am facing these two problems so please kindly any one help me .thankx alot in advance.My total ASA5510 and router1841 configuration is follows

---

…
TESASA(config)# sh run
: Saved
:
ASA Version 8.0(2)
!
hostname TESASA
enable password 8Ry2YjIyt7RRXU24 encrypted
names
!
interface Ethernet0/0
nameif OUTSIDE
security-level 0
ip address 213.X.X.X X.X.X.X
!
interface Ethernet0/1
nameif INSIDE
security-level 100
ip address 192.X.X.X X.X.X.X
!
interface Ethernet0/2
shutdown
no nameif
no security-level
no ip address
!
interface Ethernet0/3
shutdown
no nameif
no security-level
no ip ad

Looking at this configuration I do not see any issues. Just check the port settings of the port connected etc.