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New Member

PIX 515e intermittent vpn access to inside network


Company I work for has just got one of these and I have been trying to configure it using asdm but with limited luck.

I have finally managed to get the cisco vpn windows client to connect to it and I can then ping some servers and also remote desktop to some of them.

However this is intermittent and they suddenly stop responding. Odd thing is telnet to the unix servers works fine.

Even when they stop responding from the pc running the vpn software, the inside interface of the pix can still ping the servers without problems and also from servers

on the same network they can ping and remote desktop without any problems.

Im guessing I have probably misconfigured it as I am trying to get it running not knowing what to do with it but I have no option.

Any help would be appreciated as I have no idea why it works intermittently.

Result of the command: "show version"

Cisco PIX Security Appliance Software Version 7.0(4)

Device Manager Version 5.0(4)

Compiled on Thu 13-Oct-05 21:43 by builders

System image file is "flash:/image.bin"

Config file at boot was "startup-config"

xxxxx up 14 hours 52 mins

Hardware: PIX-515E, 128 MB RAM, CPU Pentium II 433 MHz

Flash E28F128J3 @ 0xfff00000, 16MB

BIOS Flash AM29F400B @ 0xfffd8000, 32KB

Encryption hardware device : VAC+ (Crypto5823 revision 0x1)

0: Ext: Ethernet0 : address is 0017.94aa.dfe3, irq 10

1: Ext: Ethernet1 : address is 0017.94aa.dfe4, irq 11

2: Ext: Ethernet2 : address is 000d.8811.bfc8, irq 11

3: Ext: Ethernet3 : address is 000d.8811.bfc9, irq 10

4: Ext: Ethernet4 : address is 000d.8811.bfca, irq 9

5: Ext: Ethernet5 : address is 000d.8811.bfcb, irq 5

Licensed features for this platform:

Maximum Physical Interfaces : 6

Maximum VLANs : 25

Inside Hosts : Unlimited

Failover : Active/Active

VPN-DES : Enabled

VPN-3DES-AES : Enabled

Cut-through Proxy : Enabled

Guards : Enabled

URL Filtering : Enabled

Security Contexts : 2

GTP/GPRS : Disabled

VPN Peers : Unlimited

This platform has an Unrestricted (UR) license.

Current running config is:

PIX Version 7.0(4)


hostname XXXX

domain-name XXXXXXXXX

enable password XXXXXXXXXX encrypted


name dpt-isp-network description net between ilab and isp

name ilab-network


interface Ethernet0

nameif outside

security-level 0

ip address


interface Ethernet1

nameif inside

security-level 100

ip address


interface Ethernet2


no nameif

no security-level

no ip address


interface Ethernet3


no nameif

no security-level

no ip address


interface Ethernet4


no nameif

no security-level

no ip address


interface Ethernet5


no nameif

no security-level

no ip address


<post 1 of 2>

New Member

Re: PIX 515e intermittent vpn access to inside network

passwd XXXXXXXXXXXXXXXX encrypted

ftp mode passive

dns domain-lookup inside

dns name-server XXXXXXXXXXXX

same-security-traffic permit intra-interface

access-list inside_nat0_outbound extended permit ip any ilab-network

access-list outside_nat0_outbound extended permit ip any ilab-network

pager lines 24

logging enable

logging asdm informational

mtu inside 1500

mtu outside 1500

ip local pool ilabvpnips mask

no failover

monitor-interface inside

monitor-interface outside

icmp permit any inside

asdm image flash:/asdm504.bin

no asdm history enable

arp timeout 14400

global (outside) 10 interface

nat (inside) 0 access-list inside_nat0_outbound

nat (inside) 10

nat (outside) 0 access-list outside_nat0_outbound

route outside 1

timeout xlate 3:00:00

timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02

timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00

timeout mgcp-pat 0:05:00 sip 0:30:00 sip_media 0:02:00

timeout uauth 0:05:00 absolute

group-policy DfltGrpPolicy attributes

banner none

wins-server none

dns-server value

dhcp-network-scope none

vpn-access-hours none

vpn-simultaneous-logins 3

vpn-idle-timeout 30

vpn-session-timeout none

vpn-filter none

vpn-tunnel-protocol IPSec

password-storage disable

ip-comp disable

re-xauth disable

group-lock none

pfs disable

ipsec-udp disable

ipsec-udp-port 10000

split-tunnel-policy tunnelall

split-tunnel-network-list none

default-domain none

split-dns none

secure-unit-authentication disable

user-authentication disable

user-authentication-idle-timeout 30

ip-phone-bypass disable

leap-bypass disable

nem disable

backup-servers keep-client-config

client-firewall none

client-access-rule none

group-policy ilabvpn internal

group-policy ilabvpn attributes

dns-server value xxxxxxxxxxxx

username xxxxxx password xxxxxx encrypted

username xxxxxx attributes

vpn-group-policy ilabvpn

http server enable

http ilab-network inside

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac

crypto dynamic-map outside_dyn_map 20 set transform-set ESP-3DES-SHA

crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map

crypto map outside_map interface outside

isakmp enable outside

isakmp policy 10 authentication pre-share

isakmp policy 10 encryption 3des

isakmp policy 10 hash sha

isakmp policy 10 group 2

isakmp policy 10 lifetime 86400

tunnel-group ilabvpn type ipsec-ra

tunnel-group ilabvpn general-attributes

address-pool ilabvpnips

default-group-policy ilabvpn

tunnel-group ilabvpn ipsec-attributes

pre-shared-key xxxxxxxxxx

no vpn-addr-assign aaa

no vpn-addr-assign dhcp

telnet ilab-network inside

telnet timeout 5

ssh timeout 5

console timeout 0

class-map inspection_default

match default-inspection-traffic



policy-map global_policy

class inspection_default

inspect dns maximum-length 512

inspect ftp

inspect h323 h225

inspect h323 ras

inspect rsh

inspect rtsp

inspect esmtp

inspect sqlnet

inspect skinny

inspect sunrpc

inspect xdmcp

inspect sip

inspect netbios

inspect tftp


service-policy global_policy global

tftp-server inside xxxxxxxxxxxx /pix


: end

New Member

Re: PIX 515e intermittent vpn access to inside network

just wondering if anyone has any ideas on this as it is staill causing problems. If I can provide any more information which may help, please just ask away.



Re: PIX 515e intermittent vpn access to inside network



nat (outside) 0 access-list outside_nat0_outbound

plus the corresponding crypto ACL, take a look at the following document:

Hope this helps or let us know if you need further assistance.

Please rate posts if it helps.


New Member

Re: PIX 515e intermittent vpn access to inside network


Thanks for the suggestion. I have commented out the 'nat (outside) 0 )' line but am not sure about the crypto acl line as there are several lines with the word crypto in.

I downloaded the pdf file for the link you advised but unfortunately at this time it does not make any sense to me at all as I am only recently starting to try and learn about this stuff.

I just don't understand why it works sometimes but not others. I have also attached a very basic network diagram incase that helps in any way.

If I can provide any other info or even if completely wiping the config and starting again would help in any way please feel free to advise as I really haven't a clue with this.

I should have realised there would be more to it than simply running the wizards and entering the info they asked for.

New Member

Re: PIX 515e intermittent vpn access to inside network

He was referring to

access-list outside_nat0_outbound extended permit ip any ilab-network

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