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Need fluid traffic between two same security level interfaces

Dear Sirs I am configuring an ASA5510 before implementing it on my network. I have 1 ISP for internet connected to Outside Interface, a DMZ Interfaces and 2 inside interfaces. One of these inside interfaces is Outside1 will be connected to a router that will have Fiber and Antenas for communicating with our small offices. I need fluid traffic between Inside an Outside1. I tried using some advices but still not working. Here's my configuration. Can you help me?
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ASA Version 8.2(1)
hostname ASAFCHFW
domain-name farmaciachavez.com.bo
enable password 6Jfo5anznhoG00fM encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
interface Ethernet0/0
nameif Outside
security-level 0
ip address X.X.X.X y.y.y.y
interface Ethernet0/1
nameif Outside1
security-level 100
ip address
interface Ethernet0/2
nameif DMZ
security-level 10
ip address
interface Ethernet0/3
nameif Inside
security-level 100
ip address
interface Management0/0
nameif management
security-level 100
ip address
boot system disk0:/asa821-k8.bin
ftp mode passive
dns server-group DefaultDNS
domain-name farmaciachavez.com.bo
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
access-list dmz_in extended permit ip any any
access-list dmz_in extended permit icmp any any
access-list Inside extended permit ip any any
access-list Inside extended permit icmp any any
access-list 100 extended permit tcp any host x.x.x..163 eq smtp
access-list 100 extended permit udp any host x.x.x.163 eq domain
access-list 100 extended permit tcp any host x.x.x.163 eq https
access-list 100 extended permit tcp any host x.x.x.163 eq www
pager lines 24
logging enable
logging asdm informational
mtu Outside 1500
mtu Outside1 1500
mtu DMZ 1500
mtu Inside 1500
mtu management 1500
icmp unreachable rate-limit 1 burst-size 1
icmp permit Outside1
icmp permit Inside
asdm image disk0:/asdm-647.bin
asdm history enable
arp timeout 14400
global (Outside) 101 interface
nat (DMZ) 101
nat (Inside) 101
static (Inside,DMZ) netmask
static (DMZ,Outside) x.x.x.163 netmask
static (DMZ,Inside) netmask
access-group 100 in interface Outside
access-group dmz_in in interface DMZ
route Outside x.x.x.161 1
route Outside1 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
dynamic-access-policy-record DfltAccessPolicy
http server enable
http management
http Inside
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
dhcpd address management
dhcpd enable management
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
class-map inspection_default
match default-inspection-traffic
policy-map type inspect dns preset_dns_map
  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
service-policy global_policy global
prompt hostname context
: end
Thanks in advanced
Eduardo Guerra
Hardware FirewallsSecurity

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8/22/2022 - Mon