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Re: PI X PPTP stopped working

From: "Charles Norton" <cnorton () centralnervous com>
Date: Wed, 26 Jul 2006 21:45:48 -0400
Possibly an expired certificate?

-Charles



-----Original Message-----
From: firewall-wizards-bounces () listserv icsalabs com
[mailto:firewall-wizards-bounces () listserv icsalabs com] On Behalf Of
vbwilliams () neb rr com
Sent: Tuesday, July 25, 2006 11:06 PM
To: Firewall Wizards Security Mailing List
Cc: Firewall Wizards Security Mailing List
Subject: Re: [fw-wiz] PI X PPTP stopped working

Couldn't tell you why it happened...but you should check to see if 
maybe there was a bug from 6.3(1) to maybe 6.3(5) that would cause 
something like this.  You're running a PIX OS that is over 3 years 
old.  I would imagine that running something recent might fix this 
issue as well as a bunch you haven't even come across yet.

Victor Williams
Network Architect


----- Original Message -----
From: Paolo Supino <paolo () actcom net il>
Date: Tuesday, July 25, 2006 2:39 pm
Subject: [fw-wiz] PI X PPTP stopped working
To: Firewall Wizards Security Mailing List <firewall-
wizards () listserv cybertrust com>


Hi

 A very strange thing happened to me today: A PIX firewall I 
have, 
stopped accepting PPTP connections. The only thing that happened 
before 
it stopped responding to PPTP connection was that I ran nmap 
scanner on 
the subnet this PIX is on (to try and find out whether someone 
decided 
to start another computer on it. Apart from this nothing has 
changed on 
this subnet for a while including the PIX' configuration. Trying 
to 
telnet to port 1723 gives the error: "Could not open a connection 
to 
host on port 1723 : Connection failed". Any help solving this 
problem 
will greatly appreciated.


the PIX configuration is (IP addresses, names and password hashes 
changed to protect the innocent):

: Written by enable_15 at 12:06:45.250 EDT Fri Jun 29 2006
PIX Version 6.3(1)
interface ethernet0 auto
interface ethernet1 auto
interface ethernet2 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 dmz security50
enable password 1234567890 encrypted
passwd 0987654321 encrypted
hostname fw1
domain-name supernova.com
clock timezone PST -8
clock summer-time PDT recurring
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol ils 389
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
names
name 10.29.22.10 JANEPC
name 10.143.103.249 JOHNPC
name 10.40.133.0 JACKSNET
object-group service SRVCGRP1 tcp
 port-object eq ftp-data
 port-object eq ftp
 port-object eq www
 port-object eq 990
 port-object eq https
 port-object range 23054 23154
object-group service SRVCGRP2 tcp
 port-object eq 28
 port-object eq 27
 port-object eq ftp-data
 port-object eq ftp
 port-object eq www
 port-object eq https
object-group service SRVCGRP3 tcp
 port-object eq ftp
 port-object eq ftp-data
 port-object eq https
 port-object eq www
access-list OUTIN permit tcp any host 192.165.164.7 object-group 
SRVCGRP1access-list OUTIN permit tcp any host 192.165.164.5 object-
group SRVCGRP2
access-list OUTIN permit icmp any any
access-list OUTIN permit tcp any host 192.165.164.8 object-group 
SRVCGRP3access-list INOUTNAT0ACL permit ip 172.16.25.0 
255.255.255.0 172.16.27.0 
255.255.255.224
access-list INOUTNAT0ACL permit ip 172.16.25.0 255.255.255.0 
172.16.25.0 
255.255.255.192
access-list DMZOUTNAT0ACL permit ip 172.16.26.0 255.255.255.0 
172.16.25.0 255.255.255.192
access-list DMZOUTNAT0ACL permit ip 172.16.26.0 255.255.255.0 
172.16.27.0 255.255.255.224
access-list VPN0SPLITTUNNELACL permit ip 172.16.25.0 255.255.255.0 any
access-list VPN0SPLITTUNNELACL permit ip 172.16.26.0 255.255.255.0 any
pager lines 24
logging on
logging trap informational
icmp permit any outside
icmp permit any inside
mtu outside 1500
mtu inside 1500
mtu dmz 1500
ip address outside 192.165.164.14 255.255.255.240
ip address inside 172.16.25.1 255.255.255.0
ip address dmz 172.16.26.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
ip local pool VPNIPPOOL 172.16.27.5-172.16.27.25
ip local pool x 172.16.99.1-172.16.99.2
pdm location 172.16.25.0 255.255.255.0 inside
pdm logging debugging 300
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list INOUTNAT0ACL
nat (inside) 1 172.16.25.0 255.255.255.0 dns 0 0
nat (dmz) 0 access-list dmz_outbound_nat0_acl
static (inside,outside) 192.165.164.4 172.16.25.4 dns netmask 
255.255.255.255 0 0
static (inside,outside) 192.165.164.5 172.16.25.5 dns netmask 
255.255.255.255 0 0
static (inside,outside) 192.165.164.6 172.16.25.6 dns netmask 
255.255.255.255 0 0
static (inside,outside) 192.165.164.7 172.16.25.7 dns netmask 
255.255.255.255 0 0
static (inside,outside) 192.165.164.10 172.16.25.27 netmask 
255.255.255.255 0 0
static (inside,outside) 192.165.164.11 172.16.25.28 netmask 
255.255.255.255 0 0
static (inside,outside) 192.165.164.8 172.16.25.8 netmask 
255.255.255.255 0 0
access-group OUTINACCESS in interface outside
route outside 0.0.0.0 0.0.0.0 192.165.164.1 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 uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
http server enable
http 172.16.25.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
sysopt connection permit-pptp
sysopt connection permit-l2tp
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto dynamic-map outside_dyn_map 20 set transform-set ESP-3DES-MD5
crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map interface outside
isakmp enable outside
isakmp policy 20 authentication pre-share
isakmp policy 20 encryption 3des
isakmp policy 20 hash md5
isakmp policy 20 group 2
isakmp policy 20 lifetime 86400
vpngroup VPN0 dns-server 172.16.25.7 192.165.160.179
vpngroup VPN0 default-domain supernova.com
vpngroup VPN0 split-tunnel VPN0SPLITTUNNELACL
vpngroup VPN0 idle-time 1800
vpngroup VPN0 password ********
telnet 172.16.25.0 255.255.255.0 inside
telnet timeout 5
ssh 172.16.25.0 255.255.255.0 inside
ssh timeout 5
console timeout 0
vpdn group VPN1 accept dialin pptp
vpdn group VPN1 ppp authentication pap
vpdn group VPN1 ppp authentication chap
vpdn group VPN1 ppp authentication mschap
vpdn group VPN1 ppp encryption mppe auto
vpdn group VPN1 client configuration address local VPNIPPOOL
vpdn group VPN1 client configuration dns 192.165.160.180 
192.168.100.47vpdn group VPN1 pptp echo 300
vpdn group VPN1 client authentication local
vpdn username user1 password ********
vpdn username user2 password ********
vpdn username user3 password ********
vpdn username user4 password ********
vpdn enable outside
username administrator password 0123456789 encrypted privilege 15
terminal width 80
Cryptochecksum: 00000000000000000000000000000000




TIA
Paolo


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