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VPN connects but no access to the LAN.

By dryflies ·
I have a pix 506e configured with inside as 192.168.1.0/24 I want to configure an ipsec vpn to use 192.168.1.192 and up and have assigned that pool to the vpn. DHCP is not provided by the Pix but by a win2k3 dhcp server. locally everything works fine. when I connect using the cisco VPN client I connect fine, everything says I am connected, but I have no access to internal LAN resources.
the ipsec pool is delivering an ip of 192.168.1.192/26 which to me seems to say that I am no allowed to view resources below 192 in the 192.168.1.* ip space. Any suggestions?

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PIX Config

by jpeoples In reply to VPN connects but no acces ...

If you're connecting to the PIX using the Cisco client then you really don't have the option to use an internal server for DHCP. The "Pool" must be a seperate subnet from the internal. Use the [nat] command to control nating from the pool to the internal network and [vpnpool] to control the options assigned to your clients. Hope that steers you in the right direction. If you need more help let me know.

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ok,

by dryflies In reply to PIX Config

so i should set my pool to be in the 192.168.2.0/26 network and then set up nat to map that set of addresses to 192.168.1.192-254? that actually sounds reasonable. I'll give it a try

on another network I have a /24 network and the pool is a range within that /24 and it works. the only difference I can see is the hardware. one is a 515e and the other is a 506e. that is why it was so confusing.

Thanks!

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IP addressing and subnets

by jpeoples In reply to ok,

All the PIX's use pretty much the same IOS. Your /24 & /26 were probably both using .0 for broadcast so you may have just gotten lucky.

You should review your IP addressing tutorials. IP uses the first and last address of a subnet for broadcast traffic. Basically it's how machines advertise their presence to the network. If you are using an address of Z.Y.X.193/26 your broadcast addresses are .192 & .255. The same address (Z.Y.X.193) with a /24 mask uses .0 & .255 as broadcasts. A machine looking for traffic on .0 will not hear or respond to traffic found on .192 and vice versa. You can't overlap addresses between subnets and all machines within a subnet have to use the same net mask.

The action of attaching to the PIX with the Cisco client is your DHCP. All clients are issued an address when they attach. The PIX will handle the routing of the traffic from the clients to your secure interface dynamically. You just need to authorize it to pass through. The [vpnpool] command I told you about will allow you to give the clients the information you would normally hand out as DHCP options.

Let me know if you have any more problems.

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ip addressing and routing.

by dryflies In reply to IP addressing and subnets

I have a fairly good knowledge of the OSI model. What I have trouble with is the cryptic terminology and language in the IOS.

here is my config with some changes to protect the guilty.

Result of firewall command: "show running config"

: Saved
:
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password QrrAFH/qLpPIurMi encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname sapix
domain-name changed.for.security
clock timezone GAMT -9
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 inside_cryptomap_dyn_20 permit ip any 192.168.2.192 255.255.255.224
access-list outside_access_in deny tcp any any
pager lines 24
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
ip local pool vpnpool 192.168.2.192-192.168.2.208
pdm location 10.10.11.117 255.255.255.255 outside
pdm location 192.168.1.192 255.255.255.192 outside
pdm location 192.168.2.192 255.255.255.255 outside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
static (outside,inside) 192.168.1.192 192.168.2.192 netmask 255.255.255.255 0 0
static (outside,inside) 192.168.1.231 10.10.11.117 netmask 255.255.255.255 0 0
access-group outside_access_in in interface outside
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 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 10.10.11.117 255.255.255.255 outside
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
sysopt connection permit-ipsec
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 dynamic-map inside_dyn_map 20 match address inside_cryptomap_dyn_20
crypto dynamic-map inside_dyn_map 20 set transform-set ESP-3DES-MD5
crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map client authentication LOCAL
crypto map outside_map interface outside
crypto map inside_map 65535 ipsec-isakmp dynamic inside_dyn_map
crypto map inside_map interface inside
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 hortcrops address-pool vpnpool
vpngroup hortcrops dns-server 192.168.1.5
vpngroup hortcrops wins-server 192.168.1.5
vpngroup hortcrops default-domain changed.for.security.edu
vpngroup hortcrops idle-time 1800
vpngroup hortcrops password ********
vpngroup mygroup address-pool vpnpool
vpngroup mygroup dns-server 192.168.1.5
vpngroup mygroup wins-server 192.168.1.5
vpngroup mygroup default-domain changed.for.security.edu
vpngroup mygroup idle-time 1800
vpngroup mygroup password ********
telnet timeout 5
ssh 10.10.11.117 255.255.255.255 outside
ssh timeout 5
console timeout 30
dhcpd dns 192.168.1.4 10.10.10.223
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd domain changed.for.security.edu
dhcpd auto_config outside
username lovedayt password lJe4UrSXzrzmUBZH encrypted privilege 15
username jlee password FeNEm9MQlHrBRw6H encrypted privilege 15
username kshellie password YcQuTm/eVd30RGv4 encrypted privilege 15
terminal width 80
Cryptochecksum:c1ede2f296b8ed38de38f1be620e8271
: end

thanks!

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which gateway you using?

by sgt_shultz In reply to VPN connects but no acces ...

could this be that one where you need to check the box that says 'use gateway on remote lan?'

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