topic thank you Marius, in Network Security

Access internet - dns

aoun.ameur1 — Tue, 12 Mar 2019 07:24:53 GMT

Hi all,

I have an issue when connect from internal network to internet via ASA5515-x

I can't open web page.

Otherwise, i have configured the default router, the nat translation and the dns service on the firewall.

dns domain-lookup INTERNET
dns domain-lookup LAN
dns server-group DefaultDNS
name-server 8.8.8.8
name-server 4.2.2.2
domain-name *****.local

ping to 8.8.8.8 is working

from my pc , i can't access internet until i put 8.8.8.8 as dns secondary

an i fix this issue from the ASA without putting 8.8.8.8 on the card of my pc ?

This seems to be a DHCP issue

Marius Gunnerud — Sun, 28 Feb 2016 19:14:37 GMT

This seems to be a DHCP issue that is if the PC uses DHCP. If so then then the DHCP server is not issuing a DNS server when handing out DHCP. If it is a static IP you must configure a DNS server to be able to resolve URLs.

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Thank you Marius for replying

aoun.ameur1 — Tue, 01 Mar 2016 16:00:22 GMT

Thank you Marius for replying.

it is a static IP configuration, so I need to configure a DNS Server as you say. The configuration of DNS Server will be in ASA or just a simple DNS Server (expl: from Microsoft with active directory roles) ?

You need to configure DNS on

Marius Gunnerud — Wed, 02 Mar 2016 06:18:44 GMT

You need to configure DNS on the PC if you want to be able to browse the internet. Configuring the ASA with a DNS just means that the ASA will be able to resolve URLs aswell. Other than that, if you will use the asa as a DHCP server then you need to also configure the dhcp service to hand out an IP that the client PCs will use for DNS resolution.

Please remember to select a correct answer and rate helpful posts

thank you Marius,

aoun.ameur1 — Wed, 02 Mar 2016 09:38:41 GMT

thank you Marius,

The problem was resolved. I correct forwarder on DNS (Active Directory) and adding 8.8.8.8 as another Forwarder.

Thannks a lot !!