PIX 501 VPN : Cannot ping inside network

Posted on 2005-03-07
Medium Priority
Last Modified: 2008-02-01
When I have a VPN connection I cant ping the inside network. It used to work but now for a certain reason it doesnt work.

Here is my log, please advice :) thanks in advance..

PIX Version 6.3(3)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password /OX5C4a10/k9cRrN encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname pixfirewall
domain-name RELAX
clock timezone CEST 1
clock summer-time CEDT recurring last Sun Mar 2:00 last Sun Oct 3:00
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 pptp 1723
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
access-list from-outside-coming-in permit tcp host host eq smtp
access-list from-outside-coming-in permit tcp host host eq smtp
access-list from-outside-coming-in permit tcp host host eq smtp
access-list from-outside-coming-in permit tcp any host eq www
access-list from-outside-coming-in permit tcp any host eq ftp-data
access-list from-outside-coming-in permit tcp any host eq ftp
access-list from-outside-coming-in permit tcp any host eq 5900
access-list from-outside-coming-in permit icmp any any
access-list inside_outbound_nat0_acl permit ip any
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside
ip address inside
ip audit info action alarm
ip audit attack action alarm
ip local pool VPN
pdm location inside
pdm location outside
pdm location outside
pdm location outside
pdm location outside
pdm location outside
pdm location inside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_outbound_nat0_acl
nat (inside) 1 0 0
static (inside,outside) tcp interface smtp smtp netmask 0 0
static (inside,outside) tcp interface ftp-data ftp-data netmask 0 0
static (inside,outside) tcp interface ftp ftp netmask 0 0
static (inside,outside) tcp interface www www netmask 0 0
static (inside,outside) tcp interface 5900 5900 netmask 0 0
access-group from-outside-coming-in in interface outside
route outside 1
timeout xlate 0:05:00
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 uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
http server enable
http inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-pptp
isakmp nat-traversal 20
telnet timeout 5
ssh timeout 5
console timeout 0
vpdn group PPTP-VPDN-GROUP accept dialin pptp
vpdn group PPTP-VPDN-GROUP ppp authentication mschap
vpdn group PPTP-VPDN-GROUP ppp encryption mppe auto
vpdn group PPTP-VPDN-GROUP client configuration address local VPN
vpdn group PPTP-VPDN-GROUP pptp echo 60
vpdn group PPTP-VPDN-GROUP client authentication local
vpdn username Mike password *********
vpdn username Mark password *********
vpdn enable outside
dhcpd address inside
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd auto_config outside
terminal width 80
: end
Question by:relaxsoftware
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Accepted Solution

alex_yala earned 250 total points
ID: 13483755
First of all, you need to exclude from your dhcpd ranges, because 253.2 is your server (by the looks of it).

Secondly, next time don't put your password in the question, it can be unencrypted (not easy, but do-able)

Thirdly, there is no real reason why you can't ping to your inside network from the PIX.

Just a few questions:
1. Could you ping from the server to the PIX firewall?
2. Could you ping from/to any devices within network?
3. Is email still coming in and out? Or everything does not work at the moment? (If yes, most likely there is a hardware failure somewhere on your network. It could be your switch or your server nic?)

Author Comment

ID: 13484217
Thanks for you response.

The DHCP has indeed been set but it isnt enabled. I use our server wich is indeed 253.2 to play as DHCP server with a range of 253.10-253.100
Ok on the password, I just changed the password on the PIX just to be sure.

Answers to your questions:

1. Yes I can ping/connect from the server to the firewall inside address without a problem.
2. No I cant ping anything when on VPN on the inside range.
3. The other functionality, such as our FTP, email and even the webserver are working as they are supposed to. The only malfunction I can find is this problem with VPN.

Could it be that the DHCP is on another server? Second a little weird addition, when I have VPN and I try to ping the first time I get a response - after that It times out.
I have restarted the PIX multiple times and reloaded the configuration just to be sure.


Expert Comment

ID: 13666763
Ping isn't exactly a perfect network connectivity test.

I think a good test is to connect via www, ftp, and vnc (5900) to your server while you have the VPN connected.

See how you go.


Author Comment

ID: 13669404
Well I bypassed the VPN to a RAS server now. I couldnt get it working

Author Comment

ID: 13669407
Ill accept alex_yala's answer altho that didnt give me the answer.

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