05-12-2006 06:56 AM - edited 02-21-2020 12:53 AM
Hi all,
I have one Cisco PIX 501 connect by outside interface to a Telecom Router. This Router show his state by web page. The router automatically each 5 minutes updates his tables and publish IP Addresses of each host connected, on his web page.
I think that Router capture IP Adresses of any host connect, by sending Gratuitous Arp. When this happens, my PIX 501 outside interface becomes not operational however its state is UP - UP.
It seams doesn't work to Router's IP only.
In this situation internet results unrechable.
Cane anyone help me???
Tks all.
Here is my Pix configuration:
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password xxxx
passwd xxx
hostname xxx
domain-name intranet.kkk.com
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
access-list outside permit icmp any any echo-reply
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside 10.0.0.253 255.255.255.0
ip address inside 192.168.1.254 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
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 in interface outside
route outside 0.0.0.0 0.0.x.x.x.0.254 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout sip-disconnect 0:02:00 sip-invite 0:03:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
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
telnet 192.168.1.0 255.255.255.0 inside
telnet timeout 5
ssh timeout 5
console timeout 0
terminal width 80
05-12-2006 07:43 AM
Hello
It seems like you are having a conectivity issue.
If you are suspicious about your provider link then you will have to capture all the information and events you can.
1.- Start by testing your inside network , enable icmp on the inside interface of the pix
conf term
icmp permit any inside
then , from a host at your inside network do a ping to the PIX inside IP
ping -t 192.168.1.254
2.- Test and check the connectivity to your router from an inside workstation , by pinging continuosly to 10.0.0.254 which is your default ip address with a
ping -t 10.0.0.254
then , see how it goes , packet loss , variable response time.
3.- You can also enable your pix log , telnet to your pix and go into configuration mode and type :
conf term
telnet timeout 60
ssh timeout 60
logg mon 7
! this command will log all events to your teminal telnet or ssh session
term mon
!
logg buff 7
!this command will log all avents to buffer
logg on
!will start logging
Try to capture the log events at the moment you loose conectivity to correlate any possible event.
Hope this helps ... !
Regards
05-12-2006 08:12 AM
Hello, tks for answer!
1) The problem is between router and PIX, it happen also when inside interface is down.
2) I test by ping (I'm connect to PIX by his serial interface to my PPC) connection between router and pix. On my PPC I have also open Internet Explorer on Router Web Page, when I refresh this page the Router update connected Host IP Address list in this moment it is systematic: connection loose.
3) I also enable pix log but last log information is ping to router.
Tks for your time.
05-12-2006 08:42 AM
Let me ask you a couple of questions
What type of router is it ? Is it a DSL router ?
Are you the administrator of the router ?
How is DHCP configured on the router ? enabled ? disabled ? (it should be disabled on the interface connected to your PIX)
Have you checked speed and duplex ¿? (try fixing it to 10 full on the router and on the outside interface of the PIX)
In any case it seems like this is a conectivity issue not a malfunctioning PIX or a configuration related problem.
05-14-2006 01:52 AM
Hi Federico, tks for answer.
Router is DSL Router, I'm Administrator of Router but it is a Italian Telecom "Black Box".
On Router I can configure basic parameters by web interface only.
DHCP is disabled.
I already Fix speed of PIX to 10full, on Router it is impossible to fix (It is autosensing)
Telecom have already change Router and I already have change PIX but the problem is the same.
Perhaps the isuue is the Router IP discovering mechanism. In fact when I refresh router webpage were router listing inside IP connection, connection lost.
Any other idea???
05-17-2006 08:28 AM
It seams possible problem related to Router ARP Sending, in fact by Frame capture I find this information inside Router ARP frame informations:
Sender IP Address: 0.0.0.0 (0.0.0.0)
Note: Pix doesn't show anything inside log.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide