Unable to access resolved names(xxx.com) from inside. 1

[wcadmin]

Hi,

I am new to the Pix world and I am having a problem setting up my pix to allow Internet access from the inside. So far I have gotten to the point where I can ping an ip address on the public network(outside) in the form of x.x.x.x from inside my firewall. I can also ping my outside interface from the public network. I know that once I move to production I should turn this off.

The main problem I am having right know is that I am unable to access(ping,telnet,tracert,http) any resolved address(name.com) from my inside network. I am also unable to access any outside web site's using the ip address(x.x.x.x) however I can ping(x.x.x.x).

My configuration is a single pix 506e. The inside is connected to a switch. Two w2k servers are also connected to the switch. The outside is connected to my dsl line via pppoe. I have listed the pix config file below. I have dhcp configured on the pix and it is assigning addresses to the servers correctly.

Any help with this problem would be greatly appreciated.

Thanks,

wc

:
PIX Version 6.2(2)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password xxxxxxxxxxxxx encrypted
passwd xxxxxxxxxxxx encrypted
hostname pixfirewall
domain-name mydomain.com
clock timezone EST -5
clock summer-time EDT recurring
fixup protocol ftp 21
fixup protocol http 80
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol ils 389
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol sip 5060
fixup protocol skinny 2000
names
access-list acl_out permit icmp any any
access-list acl_out permit ip any any
access-list acl_out permit udp any any
access-list acl_out permit tcp any any
access-list inside_access_in permit tcp any any
access-list inside_access_in permit ip any any
access-list inside_access_in permit udp any any
pager lines 24
logging on
logging buffered debugging
logging history debugging
interface ethernet0 auto
interface ethernet1 auto
mtu outside 1500
mtu inside 1500
ip address outside pppoe setroute
ip address inside x.x.x.x 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm logging debugging 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
access-group acl_out in interface outside
access-group inside_access_in in interface inside
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
http server enable
http 0.0.0.0 0.0.0.0 outside
http 0.0.0.0 0.0.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
no sysopt route dnat
telnet timeout 5
ssh timeout 5
vpdn group pppoe-verizon request dialout pppoe
vpdn group pppoe-verizon localname xxxxx
vpdn group pppoe-verizon ppp authentication pap
vpdn username xxxxxx password xxxxxxxx
dhcpd address x.x.1.10-x.x.1.50 inside
dhcpd lease 2073600
dhcpd ping_timeout 750
dhcpd enable inside
terminal width 80
Cryptochecksum:d1c637fa0f2762920142ca
: end

 

[baddos]

Yikes! Very scarry... You have the PIX allow everything in and everything out in your current configuration.

Are you sure you can access resolved names? Try to ping

http://www.somedomain.com

and see if you are getting replies. It might be that your inside clients aren't using DNS servers. I see you didn't mention any DNS servers in your DHCP configuration.

-Bad Dos

 

[wcadmin]

I know abbout the access list. I only have it set up that way as I am trying to resolve this problem.

I am not able to access resolved names(

http://www.somedomain.com).

That is the key problem. Maybe I phrased it wrong in my original message. What is to config param to associate the DNS server with the DHCP config? I thought that was taken care of by the following line

ip address outside pppoe setroute.

Am I mistaken?

Thanks

 

[baddos]

dhcpd dns xxx.xxx.xxx.1 xxx.xxx.xxx.2
!Two DNS servers
dhcpd wins xxx.xxx.xxx.1 xxx.xxx.xxx.2
!Two WINS servers

-Bad Dos

 

[wcadmin]

Hey Bad Dos,

The missing DNS entry was the problem. Name resolutin is now working on my inside network. Thanks much for your help. Now I need to go figure out how to shut down all those holes I opened up trying to make this thing work.

Thanks again,

W

 

[baddos]

Yes... You basically ran a bus through your firewall.

 

[dopehead]

Just for info, the "dhcpd auto_config outside" command will transfer all parameters given to you from the isp to your own dhcp server in the pix, i.e the DNS.

Jan