From: Don (seadon@attbi.com)
Date: Sat Dec 14 2002 - 18:43:11 GMT-3
Here is the config. A sniffer shows a response coming back to the outside
port, but not making it throught to the inside port. I wonder if it has
anything to do with the 501 acting as a client and so sending NTP respones
to itself?
Thanks for the help, Don
PIX Version 6.2(2)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password ???????????? encrypted
passwd ????????????? encrypted
hostname pixfirewall
domain-name ???????????
clock timezone PST -8
clock summer-time PDT 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 inside_access_in permit ip any any
access-list outside_access_in permit icmp any any
pager lines 24
logging on
interface ethernet0 10baset
interface ethernet1 10full
mtu outside 1500
mtu inside 1500
ip address outside dhcp setroute
ip address inside 192.168.1.1 255.255.255.0
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 outside_access_in in interface outside
access-group inside_access_in in interface inside
timeout xlate 0:05:00
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
ntp server 207.46.248.43 source outside
http server enable
http 192.168.1.0 255.255.255.0 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 192.168.1.0 255.255.255.0 inside
telnet timeout 5
ssh timeout 5
dhcpd address 192.168.1.100-192.168.1.131 inside
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
dhcpd enable inside
terminal width 80
Cryptochecksum:??????????: end
pixfirewall#
----- Original Message -----
From: "Brian T. Albert" <brian.albert@worldnet.att.net>
To: "Don" <seadon@attbi.com>; <ccielab@groupstudy.com>
Sent: Friday, December 13, 2002 5:59 PM
Subject: RE: NTP through a PIX 501
> Don,
>
> I have a setup in my lab with a router outside the pix configured as a NTP
> master and a router inside the firewall configured as a NTP server. My 501
> runs 6.22 and has no problem allowing the return connection from the
master
> back to the server. I have no entry in my acl on the outside interface to
> accomplish this. Can you supply your configs?
>
> Brian T. Albert
> CCIE #9682
> brian.albert@worldnet.att.net
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Don
> Sent: Friday, December 13, 2002 6:13 PM
> To: ccielab@groupstudy.com
> Subject: NTP through a PIX 501
>
>
> Anyone know how to allow NTP clients behind a PIX 501 running 6.22 to do a
> time request? In my network, the NTP clients try to contact the time
server
> on the Internet, but the PIX does not allow the response from the server
> back into the network.
> Thanks, Don
> .
.
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