port range from outside to inside

Unanswered Question
Jul 8th, 2010
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For an ASA 5505 and I need to open up a range of ports from 28300 - 28400 and 28600 - 28700, all for access from the outside interface to any machine on the inside interface. Can anyone help out with this?

# sh running-config

: Saved                             


ASA Version 7.2(4)


hostname ciscoasa

enable password 8HgaP2T2asdbjsx1GBdq encrypted

passwd Ku287h/3Z9f25tj6 encrypted         



interface Vlan1

nameif inside

security-level 100

ip address


interface Vlan2

nameif outside

security-level 0

ip address dhcp setroute


interface Ethernet0/0

switchport access vlan 2


interface Ethernet0/1


interface Ethernet0/2


interface Ethernet0/3


interface Ethernet0/4


interface Ethernet0/5


interface Ethernet0/6


interface Ethernet0/7


ftp mode passive

pager lines 24 

logging asdm informational

mtu inside 1500           

mtu outside 1500

icmp unreachable rate-limit 1 burst-size 1

no asdm history enable                   

arp timeout 14400     

global (outside) 1 interface

nat (inside) 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                   

http server enable                                         

http inside

no snmp-server location             

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

telnet timeout 5                                                     

ssh scopy enable

ssh inside

ssh timeout 5                       

console timeout 0

dhcpd auto_config outside


dhcpd address inside

dhcpd enable inside                           



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                                        

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Nagaraja Thanthry Thu, 07/08/2010 - 20:04
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  • Cisco Employee,


Are you doing it for a specific application? I see from your configuration that you are using dynamic PAT. So, there is no point in opening those ports as they will not be mapped to any device. I would suggest you using inspects for opening those ports dynamically (as long as it is one of the standard applications supported by the firewall).

Hope this helps.



gary.grobe Thu, 07/08/2010 - 20:11
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Yeah, it's specific for a Matlab application. I will soon add a static IP to the outside interface. It's basically a default config right now.

Nagaraja Thanthry Thu, 07/08/2010 - 20:31
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  • Cisco Employee,


As long as you are assigning public IP to every host that needs the port to be opened, then you can use the following statement:

access-list permit tcp any host range 28300 28400

access-list permit tcp any host range 28600 28700

You need to repeat the above lines for every host.If every inside device has a corresponding public IP and you want it to be open for everybody, then replace the "host public IP" by "any".

Hope this helps.




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