NAT overlapping networks

I know that this topic is in every sense, but I can't find one that exactly matches my scenario. I have 3 (or more) systems all with the same subnet that need to access a central NAS. There is no external network here is version independent of all, but I thought I'd put the SIN on the outtermost router WAN. I know I can do this with 4 linksys routers at low cost.

My main questions are:

(1) can I do this with a single cisco device using NAT to replace all of the routers in the dotted red box.

(2) if so does anyone have a recommendation or a model on a device?

Diagram is below:

Please forgive me if my terminology / diagrams are not accurate, I'm pretty new to this.

Should not make a difference. Instead of Fas0/0.x interfaces, you will use the VLANx interfaces.

Tags: Cisco Security

Similar Questions

NAT overlapping with remote VPN access

Hi all

My client has an ASA 5510 at the main location. We're shooting for their remote access VPN SSL needs. 30 or so remote users.

The problem is that the main site has a number of network 192.168.1.0/24. The number of Linksys routers bought on shelf at any store of default.

Obviously, by default, it does not work. When users connect to the VPN from home, it connects but network resources are not available.

I read about overlapping NAT with tunnels of site to another, but that all remote access? Is it possible as well?

Any help to point me in the right direction would be much appreciated.

Thank you!

Look at the PIX / ASA 7.x and later: VPN Site to Site (L2L) with the example of setting up IPsec policy NAT (overlapping of private networks) for more information

http://www.Cisco.com/en/us/products/HW/vpndevc/ps2030/products_configuration_example09186a00808c9950.shtml

LAN-to-LAN IPsec VPN with overlapping networks problem

I am trying to connect to two networks operlapping via IPsec. I already have google and read

http://www.Cisco.com/en/us/products/ps6120/products_configuration_example09186a0080b37d0b.shtml

Details:

Site_A use ASA 5510 with software version 8.0 (4) 32. Site_A use 10.100.0.0/24, 10.100.1.0/24 and 10.100.2.0/24 inside networks. 10.100.0.0/24 is directly connected to ASA (like vlan10), 10.100.1.0/24 and 10.100.2.0/24 are routed.

Site_B use Linux box and networks 10.100.1.0/24, 10.100.2.0/24, 10.100.3.0/24 and so on (mainly 10.100.x.0/24). I have not implemented this ASA, we took over this infrastructure without other documentation whatsoever.

According to the above link I should use double NAT. Site_B will see the Site_A as 10.26.0.0/22 networks, and Site_A see networks in Site_B as 10.25.0.0/24. Site_A is allowed access only 10.100.1.0/24 in the Site_B, and Site_B is allowed access to all the networks of the Site_A 10.100.x.0/24 - so / 22 10.26.0.0/22 mask. I would like, for example, ssh to host in the Site_B to host the Site_A using 10.26.1.222 as the destination ip address (and it should be translated in 10.100.1.222 on the side Site_A). I'm looking for something like ip nat type match-host in Cisco routers - I want to translate only a part of the network address leave the intact host Party. Anyway, following the steps from the link displayed above everything is ok until the command:

static (companyname, outside) 10.26.0.0 access list fake_nat_outbound

which translates into:

WARNING: address real conflict with existing static

TCP companyname:10.100.0.6/443 to outside:x.x.x.178/443 netmask 255.255.255.255

WARNING: address real conflict with existing static

TCP companyname:10.100.0.20/25 to outside:x.x.x.178/25 netmask 255.255.255.255

WARNING: address real conflict with existing static

TCP companyname:10.100.0.128/3389 to outside:x.x.x.178/50000 netmask 255.255.255.255

WARNING: address real conflict with existing static

TCP companyname:10.100.0.26/3389 to outside:x.x.x.181/2001 netmask 255.255.255.255

WARNING: address real conflict with existing static

TCP companyname:10.100.0.27/3389 to outside:x.x.x.181/2002 netmask 255.255.255.255

WARNING: address real conflict with existing static

TCP companyname:10.100.0.28/3389 to outside:x.x.x.178/2003 netmask 255.255.255.255

Those are redirects to port on Site_A used for mail, webmail, etc. What should I do to keep the redirects from the Internet to companyname vlan and at the same time to have work l2l ipsec tunnel linking networks that overlap?

Thank you in advance for any help or advice.

The ASA config snippet below:

!

ASA 4,0000 Version 32

!

no names

name 10.25.0.0 siteB-fake-network description fake NAT network to avoid an overlap of intellectual property

name 10.26.0.0 description of siteA-fake-network NAT fake network to avoid an overlap of intellectual property

!

interface Ethernet0/0

Shutdown

nameif inside

security-level 100

IP 10.200.32.254 255.255.255.0

!

interface Ethernet0/1

nameif outside

security-level 0

IP address x.x.x.178 255.255.255.248

!

interface Ethernet0/2

No nameif

no level of security

no ip address

!

interface Ethernet0/2.10

VLAN 10

nameif companyname

security-level 100

IP 10.100.0.254 255.255.255.0

!

interface Ethernet0/2.20

VLAN 20

nameif wifi

security-level 100

the IP 10.0.0.1 255.255.255.240

!

interface Ethernet0/2.30

VLAN 30

nameif dmz

security-level 50

IP 10.0.30.1 255.255.255.248

!

interface Ethernet0/3

Shutdown

No nameif

no level of security

no ip address

!

interface Management0/0

nameif management

security-level 100

IP 10.100.100.1 255.255.255.0

management only

!

permit same-security-traffic inter-interface

permit same-security-traffic intra-interface

object-group Protocol TCPUDP

object-protocol udp

object-tcp protocol

Group of objects in the inside network

object-network 10.100.0.0 255.255.255.0

object-network 10.100.1.0 255.255.255.0

object-network 10.100.2.0 255.255.255.0

DM_INLINE_TCP_1 tcp service object-group

port-object eq 2221

port-object eq 2222

port-object eq 2223

port-object eq 2224

port-object eq 2846

DM_INLINE_TCP_5 tcp service object-group

port-object eq ftp

port-object eq ftp - data

port-object eq www

EQ object of the https port

object-group service DM_INLINE_SERVICE_1

the eq field tcp service object

the eq field udp service object

DM_INLINE_TCP_6 tcp service object-group

port-object eq 2221

port-object eq 2222

port-object eq 2223

port-object eq 2224

port-object eq 2846

the DM_INLINE_NETWORK_1 object-group network

object-network 10.100.0.0 255.255.255.0

object-network 10.100.2.0 255.255.255.0

standard access list securevpn_splitTunnelAcl allow 10.100.0.0 255.255.255.0

outside_access_in list extended access permit tcp any host x.x.x.178 eq 50000

outside_access_in list extended access permit tcp any host x.x.x.178 eq smtp

outside_access_in list extended access permit tcp any host x.x.x.178 eq https

outside_access_in list extended access permit tcp any host x.x.x.179 DM_INLINE_TCP_1 object-group

outside_access_in list extended access permit tcp any host x.x.x.181 eq ftp

outside_access_in list extended access permit tcp any host x.x.x.181 eq ftp - data

outside_access_in list extended access permit tcp host 205.158.110.63 eq x.x.x.180 idle ssh

access extensive list ip 10.100.0.0 inside_access_in allow 255.255.255.0 10.100.1.0 255.255.255.0

inside_access_in list extended access allowed ip-group of objects to the inside network 10.100.99.0 255.255.255.0

inside_access_in list extended access allowed ip-group of objects to the inside network 10.0.30.0 255.255.255.248

inside_access_in list extended access permit tcp host 10.100.0.6 any eq smtp

inside_access_in list extended access permitted tcp object-group network inside any eq www

inside_access_in list extended access permitted tcp object-group network inside any https eq

inside_access_in list extended access permitted tcp-group of objects to the inside-network WG 1023 any eq ftp - data

inside_access_in list extended access permitted tcp-group of objects to the inside-network WG 1023 any ftp eq

inside_access_in list extended access allowed object-group objects TCPUDP-group to the network inside any eq 9999

inside_access_in list extended access allowed object-group objects TCPUDP-group to the network inside any eq 3389

inside_access_in list extended access allowed object-group network inside udp any eq field

companyname_access_in list extended access allowed ip-group of objects to the inside network 10.100.1.0 255.255.255.0

companyname_access_in list extended access allowed ip-group of objects to the inside network 10.100.99.0 255.255.255.0

companyname_access_in list extended access allowed ip-group of objects to the inside network 10.0.30.0 255.255.255.248

companyname_access_in list extended access permit tcp host 10.100.0.6 any eq smtp

companyname_access_in list extended access permitted tcp object-group network inside any eq www

companyname_access_in list extended access permitted tcp object-group network inside any https eq

companyname_access_in list extended access permitted tcp-group of objects to the inside-network WG 1023 any eq ftp - data

companyname_access_in list extended access permitted tcp-group of objects to the inside-network WG 1023 any ftp eq

companyname_access_in list extended access allowed object-group objects TCPUDP-group to the network inside any eq 9999

companyname_access_in list extended access allowed object-group objects TCPUDP-group to the network inside any eq 3389

companyname_access_in list extended access allowed object-group network inside udp any eq field

wifi_access_in list extended access permitted tcp 10.0.0.0 255.255.255.240 host 10.100.0.40 eq 2001

access extensive list ip 10.100.0.0 companyname_nat0_outbound allow 255.255.255.0 10.100.99.0 255.255.255.0

access extensive list ip 10.100.0.0 companyname_nat0_outbound allow 255.255.255.0 10.0.0.0 255.255.255.240

access extensive list ip 10.100.0.0 companyname_nat0_outbound allow 255.255.255.0 10.0.30.0 255.255.255.248

access extensive list ip 10.100.0.0 companyname_nat0_outbound allow 255.255.255.0 10.100.2.0 255.255.255.0

access extensive list ip 10.100.2.0 companyname_nat0_outbound allow 255.255.255.0 10.0.30.0 255.255.255.248

access extensive list ip 10.100.1.0 companyname_nat0_outbound allow 255.255.255.0 10.100.99.0 255.255.255.0

access extensive list ip 10.100.2.0 companyname_nat0_outbound allow 255.255.255.0 10.100.99.0 255.255.255.0

wifi_nat0_outbound to access ip 10.0.0.0 scope list allow 255.255.255.240 10.100.0.0 255.255.255.0

dmz_access_in list extended access permitted tcp 10.0.30.0 255.255.255.248 any DM_INLINE_TCP_5 object-group

dmz_access_in list extended access permitted tcp 10.0.30.0 255.255.255.248 host 10.100.0.2 object-group DM_INLINE_TCP_6

dmz_access_in list extended access allowed object-group DM_INLINE_SERVICE_1 10.0.30.0 255.255.255.248 object-group DM_INLINE_NETWORK_1

dmz_access_in list extended access deny ip 10.0.30.0 255.255.255.248 all

access extensive list ip 10.0.30.0 dmz_nat0_outbound allow 255.255.255.248 10.100.0.0 255.255.255.0

access extensive list ip 10.0.30.0 dmz_nat0_outbound allow 255.255.255.248 10.100.99.0 255.255.255.0

access extensive list ip 10.0.30.0 dmz_nat0_outbound allow 255.255.255.248 10.100.2.0 255.255.255.0

outside_1_cryptomap to access extended list ip 10.26.0.0 allow 255.255.252.0 10.25.0.0 255.255.255.0

access extensive list ip 10.100.0.0 fake_nat_outbound allow 255.255.252.0 10.25.0.0 255.255.255.0

IP local pool clientVPNpool 10.100.99.101 - 10.100.99.199 mask 255.255.255.0

IP verify reverse path inside interface

IP verify reverse path to the outside interface

IP audit name IPS attack action alarm down reset

IP audit name IPS - inf info action alarm

interface verification IP outside of the IPS - inf

verification of IP outside the SPI interface

NAT-control

Global (inside) 91 10.100.0.2

Global (inside) 92 10.100.0.4

Global (inside) 90 10.100.0.3 netmask 255.255.255.0

Global interface 10 (external)

Global x.x.x.179 91 (outside)

Global x.x.x.181 92 (outside)

Global (outside) 90 x.x.x.180 netmask 255.0.0.0

interface of global (companyname) 10

Global interface (dmz) 20

NAT (outside) 10 10.100.99.0 255.255.255.0

NAT (companyname) 0-list of access companyname_nat0_outbound

NAT (companyname) 10 10.100.0.0 255.255.255.0

NAT (companyname) 10 10.100.1.0 255.255.255.0

NAT (companyname) 10 10.100.2.0 255.255.255.0

wifi_nat0_outbound (wifi) NAT 0 access list

NAT (dmz) 0-list of access dmz_nat0_outbound

NAT (dmz) 10 10.0.30.0 255.255.255.248

static (companyname, outside) tcp https 10.100.0.6 https interface subnet 255.255.255.255 mask

static (companyname, outside) tcp interface smtp 10.100.0.20 smtp netmask 255.255.255.255

static (companyname, outside) interface 50000 10.100.0.128 TCP 3389 netmask 255.255.255.255

static (companyname, external) x.x.x.181 2001 10.100.0.26 TCP 3389 netmask 255.255.255.255

static (companyname, external) x.x.x.181 2002 10.100.0.27 TCP 3389 netmask 255.255.255.255

static (companyname, outside) interface 2003 10.100.0.28 TCP 3389 netmask 255.255.255.255

static (dmz, outside) tcp x.x.x.181 ftp 10.0.30.2 ftp netmask 255.255.255.255

static (companyname, companyname) 10.100.1.0 10.100.1.0 netmask 255.255.255.0

static (companyname, companyname) 10.100.2.0 10.100.2.0 netmask 255.255.255.0

inside_access_in access to the interface inside group

Access-group outside_access_in in interface outside

Access-group companyname_access_in in interface companyname

Access-group wifi_access_in in wifi interface

Access-group dmz_access_in in dmz interface

Route outside 0.0.0.0 0.0.0.0 x.x.x.177 1

Companyname route 10.0.1.0 255.255.255.0 10.100.0.1 1

Companyname route 10.100.1.0 255.255.255.0 10.100.0.1 1

Companyname route 10.100.2.0 255.255.255.0 10.100.0.1 1

dynamic-access-policy-registration DfltAccessPolicy

!

Crypto-map dynamic outside_dyn_map 20 set pfs

Crypto-map dynamic outside_dyn_map 20 the transform-set ESP - 3DES - SHA TRANS_ESP_3DES_MD5 value

life together - the association of security crypto dynamic-map outside_dyn_map 20 28800 seconds

Crypto-map dynamic outside_dyn_map 20 kilobytes of life together - the association of safety 4608000

PFS set 40 crypto dynamic-map outside_dyn_map

Crypto-map dynamic outside_dyn_map 40 value transform-set ESP-3DES-SHA

life together - the association of security crypto dynamic-map outside_dyn_map 40 28800 seconds

Crypto-map dynamic outside_dyn_map 40 kilobytes of life together - the association of safety 4608000

Crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 value transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA MD5-ESP-3DES ESP-DES-SHA ESP-DES-MD5

Dynamic crypto map SYSTEM_DEFAULT_CRYPTO_MAP 65535 define security association lifetime 28800 seconds

cryptographic kilobytes 4608000 life of the set - the association of security of the 65535 SYSTEM_DEFAULT_CRYPTO_MAP of the dynamic-map

card crypto outside_map 1 match address outside_1_cryptomap

card crypto outside_map 1 set pfs Group1

outside_map 1 counterpart set a.b.c.1 crypto card

card crypto outside_map 1 set of transformation-ESP-3DES-SHA

map outside_map 20-isakmp ipsec crypto dynamic outside_dyn_map

outside_map interface card crypto outside

!

internal DefaultRAGroup group strategy

attributes of Group Policy DefaultRAGroup

value of server WINS 10.100.0.3

value of server DNS 10.100.0.3

nom_societe.com value by default-field

internal DefaultRAGroup_1 group strategy

attributes of Group Policy DefaultRAGroup_1

value of server DNS 10.100.0.3

Protocol-tunnel-VPN l2tp ipsec

internal group securevpn strategy

securevpn group policy attributes

value of server WINS 10.100.0.3 10.100.0.2

value of 10.100.0.3 DNS server 10.100.0.2

VPN-idle-timeout 30

Protocol-tunnel-VPN IPSec

nom_societe.com value by default-field

attributes global-tunnel-group DefaultRAGroup

address clientVPNpool pool

authentication-server-group COMPANYNAME_AD

Group Policy - by default-DefaultRAGroup_1

IPSec-attributes tunnel-group DefaultRAGroup

pre-shared-key *.

tunnel-group securevpn type remote access

tunnel-group securevpn General attributes

address clientVPNpool pool

authentication-server-group COMPANYNAME_AD

Group Policy - by default-securevpn

tunnel-group securevpn ipsec-attributes

pre-shared-key *.

tunnel-group securevpn ppp-attributes

ms-chap-v2 authentication

tunnel-group a.b.c.1 type ipsec-l2l

a.b.c.1 group tunnel ipsec-attributes

pre-shared-key *.

Are you sure that static-config does not make to the running configuration?

By applying this 'static big' you're essentially trying to redirect the ports, which have already been transmitted by the rules in your existing configuration. This explains the caveat: what you are trying to do has some overlap with existing static.

(Sorry for the use of the transmission of the word, but this behavior makes more sense if you look at it like this; although "port forwarding" is not Cisco-terminology.)

But... whenever I stumbled upon this question, the warning was exactly that: a WARNING, not an ERROR. And everything works as I want it to work: the specific static in my current config simply have priority over static grand.

If you would like to try to do the other opposite you would get an error (first static major, then try to apply more specific) and the config is not applied.

So could you tell me the config is really not accepted?

Several tunnels to Datacenter VPN with overlapping networks

Hello guys,.

We are starting to host applications for customers who need trusts (maybe?) Windows and full access to a class C subnet in our IP data center.

My problem is most of our customers are small MOM and pop stores IPed to 192.168.1.x. I intend to install my own Cisco ASA in each of these sites and create a VPN to the data center to access the application. The last 2 sites I've done, I have re-IPed network to a mine plan. I start to run in many customers that we simply host the app for and I can't really make them Re - IP network if they do not want.

My question is what are my options here? I guess some kind of NAT, but I don't really know how it works. With a Windows trust communication must be 2 tracks. If we did not trust, I could see this work without problem with a simple NAT right? Firewall guy would you NAT on? The remote end or Data Center?

Any help and advice is appreciated.

I'm a complete network of Cisco, ASAs, catalysts, routers, etc...

Hi Billy,

Basically, for the overlap of networks, you will run natting on both sites for interesting traffic.
If you have networks that overlap, you can follow this link if you use Cisco ASA and this link for Cisco routers as a VPN endpoint devices.

Kind regards
Dinesh Moudgil

PS Please rate helpful messages.

Assign a static IP to guest with NAT Virt network adapter?

I'll put up a * nix VM that I want to give out-bound network connectivity, but I want to make its services available only on my local machine (for example MySQL). VMWare Player with NAT assigned a DHCP address, but because it is not update my host name resolution, to access a service on the client, I need to use the IP address.
I would like to assign a static IP address on the guest, so I can add an easy to use in the host of my host file. I can update my guest network interface file to not assign no problem. I'm worried that I can use an IP address that overlaps the VMWare DHCP pool (and may occur a conflict of address when I turn on a new virtual machine), or outside the range of the virtual switch.
Is this possible with VMWare Player, and is there something in the configuration files, that I might be able to change this?

Default 192.168.x.1 address is used for the adapter to the virtual host, 192.168.x.2 as the address of the NAT gateway and 192.168.x.128... 254 for DHCP, which means that you can assign static IP addresses between 192.168.x.3 and... 127.

However, you can configure rather a reserve in the vmnetdhcp.conf file by adding for example

host LuckyLuke {}
Hardware ethernet 00: 0C: 29:23:b6:12;
fixed-address 192.168.156.77;
}

just in front of the brand ' # end ' . Please replace "156" by your own subnet. In the example above, the VMS with MAC address "00: 0C: 29:23:b6:12" will receive the IP "192.168.156.77". BTW. hostname (in this case "LuckyLuke") does not matter, it must just be unique in the file.

André

VPN access to site-toSite to servers of HO with remote site with overlapping network...

Hi all

I have an obligation to create a tunnel vpn site-to-site on ASA 5510 from a remote location to my HO, I have already other site to site tunnels are on the rise and running on the ASA. This is what my remote site got the network address that is part of a subnet used in HO(192.168.10.0/24). My requirement is only my need to access remote site couple of my servers in HO, who is in the subnet 192.168.200.0/24.

Veuileez help how can I achieve this... your advice at the beginning is very appreciated...

Thanks in advance
Mikael

Hi Salem,

I think the installer at your end is a bit like this:

You want the remote location to access the subnet 192.168.200.0/24 behind the ASA HQ servers. In this case, you can NAT traffic from the remote site to a different subnet when you go to 192.168.200.0/24.

i.e. the 192.168.10.0/24 subnet resemble 192.168.51.0/24 when he goes to 192.168.200.0

This can be done by using political based natting:

permit access-list policy-nat ip 192.168.10.0 255.255.255.0 192.168.200.0 255.255.255.0

public static 192.168.51.0 (inside, outside) access-l policy-nat

In the encryption of the remote side access list, you will have:

cryptoacl ip 192.168.51.0 access list allow 255.255.255.0 192.168.200.0 255.255.255.0 (this is because the remote side will see 192.168.51.0/24 and not the 192.168.10.0/24)

Similarly on the end of HQ the accesslist crypto will be

XXXXX 192.168.200.0 ip access list allow 255.255.255.0 192.168.51.0 255.255.255.0

Please try this and let me know if it helps.

Thank you

Vishnu Sharma

Merger of NAT private network 6.0.2

I have Fusion running on 10.9.2 6.0.2. I created a custom vmnet2 network that is just installed to enable NAT. I changed to 192.168.10.0/24 subnet. I installed Windows Server 2012 Standard on guest, then assign the adapter vmnet2. I configured a static IP address on the server of 192.168.10.11/24 comments. Where it is documented, or where I can check to see what I should use it as a gateway address to come down from my private network? On my host, I checked the line of command: ifconfig - a that does not list all interfaces on the private network. Since the server OS comments I tried to ping 192.168.10.1 and nothing, however 192.168.10.2 responded. I put this on my doorstep and I'm good to go. I can get out to the Internet and other networks. His work and I am pleased, could someone point me in the direction where it is documented?
Thank you
John

Note that although this is in VMware Workstation Documentation however it is applicable to VMware Fusion as well.

Take a look on: Conventions DHCP to assign IP addresses in Host-Only and NAT networking

need help with natted routing networks

Hello
1 VMWorkstation on the 192.168.1.0 network
2. virtual machines on natted 10.0.0.0 255.255.0.0 Gateway 10.0.0.1
I have 2003 domain on this network. I have DC, Exchange and work station.
I have no problem with access for network 10.0.0.0 192...
But I can't ping 10.0.0.0... from 192.0.0.0 machines, beside the host 192.168.1.130.
Yes, I can ping the host virtual.
I added the road to 10.0.0.0 on one of the 192... machines, it can't do on 10.0.0.0 machine
What does take to ping network 10...
THX.
Michael.

If 10.0.0.0 is your virtual network of NAT (VMnet8) you cannot ping it because it is hidden to the outside (because it's NAT). You can only join in this network of specific port forwarding, but packages must go to the IP address of the host (and then they are redirected to the virtual prompt appropriate depending on the configuration of port forwarding).

AWo
VCP / VMware vEXPERT 2009

= Due to a lack of employees, human beings humans are working here. -Treat it with care, they are rare. =

Unable to connect the host server alone on the bridge or a NAT server network

I have configuered 5 comments OS (windows server 2003) on Vmware workstation (on a single host). Among them three servers are on the network host and two others respectively is on the bridge network and NAT. All the guest OS is on a local network (i.e. team).
I can connect on the bridge or a NAT server to the internet. But I can't ping on the server (on the bridge or NAT) servers (on the single host network). IP address assigned to the host only network is the subnet of class A. And on the bridge or a NAT server is dynamically assigned by the DHCP service.
Can someone help me?

whether you are able to connect all the virtual machines, you have 2 options:

-connect all your virtual machines on the host network

-If you really need to keep your 2 VMs on the bridge and NAT, you must assign the 2 network cards to those virtual machines. One of the cards connected in Bridged/NAT and the other network card NETWORK connected to host only.

concerning

Jose

Problem VPN site to Site with overlapping networks

We currently have a PIX 515E firewall as a headboard with many tunnels of site-to-site configured for her with the enpoints of PIX 506. Our internal LAN addressing scheme is 172.18.0.0 255.255.0.0. Addresses of local network in two of the remote networks with congigured VPN site-to-site are 172.18.107.0 255.255.255.224 and 172.18.107.32 255.255.255.0. Remote network access to all services on our internal network very well. We have 20 other network segments configured the same way. The 172.18.107.32.0 network needs to communicate with the 172.18.107.0 network for the services of file on the other remote PIX. Since the station PIX will not allow traffic to leave the same interface it came we thought with him we would just set up a tunnel from site to site between the two remote LAN. After the configuration of the site to another remote firewalls do not appear to try to establish tunnels when sending valuable traffic. I turned on debug for ISAKMP and nothing is either sent or received on a remote Firewall with regard to these tunnels. It's almost like since we already have a tunnel set to our 172.18.0.0 internal LAN that the remote PIX will not build specifically to 172.18.107.0 tunnel. I am able to ping each remote peer with each other and hear protection rules, but nothing has ever been established.

Is what we are trying to do possible? Sorry for the long post but the kind of a strange scenario. Thanks in advance for any help.

In what order are the numbers of seqence card crypto for configuring vpn on pix distance units? It could be that you are trying to install is a lot and will be checked later as head of pix. If this is the case, then yes the 172.18/16 road prevail the 172.18.107/24. Try to rebuild the entrance card crypto with a lower number so that traffic to 172.18.107/24 comes first.

I would like to know how it works.

NAT overlapping by IPSec VPN

I followed the instructions on http://cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a00800b07ed.shtml

and have been able to establish the VPN and through each host ping. I have problems with some of the packets getting dropped. I use low-cost hardware (routers 1812 and 1841) and I wonder if this is the reason why he lost half of my packages. Or is there another reason this is happening. I would like to know if I can impliment QOS on this traffic that must pass from one site to the other. Since 50% of packet losses are unacceptable.

Joe,

Depending on the amount of traffic you send through the tunnel, the 1800 series router may or may not be allowed. But, we need to know if the packets are getting lost oversubscription of the link or because the processing power of the router is maxed out.

Here's the datasheet model 1800 router fixed and the number of performances of IPSEC is 40 Mbps 3DES @ 1400-byte packets.

http://www.Cisco.com/en/us/products/ps5853/products_data_sheet0900aecd8028a95f.html

BTW, you could use QOS to prioritize, shape, font, etc. packages but if another network device is down packages, then it won't make a difference and you will always have ignored packets.

Kind regards

Arul

* Please note all useful messages *.

NAT and Network Configuration in VM Player 6

Hello
In version 5, I used to run
Rundll32.exe VMNetUI_ShowStandalone vmnetui.dll
In version 6, I have no idea! anyone?

I mean, sure, I tried workaround by copying the files vmnetcfg.exe and vmnetcfglib.dll from VMware Workstation 10 in a single system with VMware Player 6 installed, altered VMnets with it otherwise I would have posted what I did!

In addition, I used appropriate utilities to examine the files .exe and .dll sizes in the two VMware Workstation 10 and VMware Player 6 to examine the function calls available in each and found no call necessary (s) in the .exe or .dll to VMware Player 6 files to reproduce what can do the files vmnetcfg.exe and vmnetcfglib.dll from VMware Workstation 10. Even though I admit that it was a quick review, however I am confident that the way to access a graphical user interface in VMware Player 6 fully functional virtual network Editor is to use the files vmnetcfg.exe and vmnetcfglib.dll from VMware Workstation 10.

I only am not the slightest bit surprised that VMware has completely removed the virtual network Editor GUI in the VMware Player 6 version!

Post edited by: WoodyZ... Also note that before WS10 only the vmnetcfg.exe file was needed, and I did not test the pre-WS10 vmnetcfg.exe file to see if it can also work in VMware Player 6. When I had the chance, I'll have to test this.

NAT on the VPN traffic

Hello everyone, I need help in a vpn configuration, this is the problem that I need nat all vpn traffic because I net to put into place a vpn but I already have another vpn with the same network, so that overlap with the new one, then how I can nat overlaps all traffic to another network in order to avoid the network?.

Please I really need help

Thank you

You say that the 192.168.1.100 is able to go through the tunnel and the internet now?

Try to add another...

IP nat inside source static 192.168.1.101 10.10.44.101 map route VPN

for example.

Federico.

Rule of NAT for vpn access... ?

Hey, putting in place the vpn ssl via the client Anyconnect on a new ASA 5510, ASA ASDM 6.4.5 8.4.2.

I am able to 'connect' through the anyconnect client, & I am assigned an ip address from the pool of vpn that I created, but I can't ping or you connect to internal servers.

I think that I have configured the split tunneling ok following the guide below, I can browse the web nice & quickly while connected to the vpn but just can't find anything whatsoever on the internal network.

http://www.Cisco.com/en/us/products/ps6120/products_configuration_example09186a0080975e83.shtml

I suspect her stockings for a nat rule, but I am a bit stuck if it should be a rule of nat object network or if it must be dynamic/static & if its between the external interface or external ip & network inside or the VPN (I created the pool on a different subnet), or a 'Beach' (but then I am getting overlapping ip errors when I try to create a rule for a range of IP addresses.

Any advice appreciated,

Hi Eunson,

After have connected you to the ASA that clients receive an IP address, let's say 192.168.10.0/24 pool, the network behind the ASA is 192.168.20.0/24.

On the SAA, you would need an NAT exemption for 192.168.20.0 to 192.168.10.0

Create two groups of objects, for pool VPN and your itnernal LAN.

object-group network object - 192.168.20.0

object-network 192.168.20.0 255.255.255.0

object-group network object - 192.168.10.0

object-network 192.168.10.0 255.255.255.0

NAT (inside, outside) 1 source static object - 192.168.20.0 object - 192.168.20.0 destination static object - 192.168.10.0 object - 192.168.10.0 non-proxy-arp-search to itinerary

At the inside = interface behind which is your LOCAL lan

Outside = the interface on which the Clients connect.

If you can't still access then you can take the shot on the inside interface,

create and acl

access-list allowed test123 ip host x.x.x.x y.y.y.y host

access-list allowed test123 ip host host x.x.x.x y.y.y.y

interface test123 captures inside test123 access list

view Cape test123

It will show if the packages are extinguished inside the interface and if we see that the answers or not. If we have all the answers, this means that there might be a routing on the internal LAN problem as devices know may not be not to carry the traffic of 192.168.10.0 return to the ASA inside the interface.

Or maybe it's that there is a firewall drop packets on your internal LAN.

HTH

2 1 modem from comcast networks, cable ISP using 2 linksys wrt routers

I need to have 2 separate networks my comcast cable modem.

I expected to plug a hub 5 ports on the cable moden, then plug the wrt610n both the wrt54g in the hub. Seems that only routers will get an ip address assigned from comcast.

Is it possible to have a cable modem ISP and create two home networks with both routers linksys, so two networks independent serperate?

Network 1: i ' public use and family (wireless computer laptop Jane, domestic PC etc.).

Household/enterprise network 2: private and separate from the family public network (Wireless laptop / company PC, server multimedia not secure).

Thank you

Your ISP only allows you to have a single public IP (i.e. a single active internet connection) at any time. This is part of your contract. If you want to use two internet connections at the same time as you need to update your contract with your ISP. Then, you can use two public IP addresses.

Otherwise, it depends on how 'independent' you want. The best and complete separation of networks is exactly the way that you set up for the moment.

You can get a separation in chaining the two routers. A router default configuration does NAT (network address translation) which makes it basically on the side inaccessible LAN from the internet side except if you configure the router to do otherwise (i.e. set up the forwarding port or UPnP or similar).

So, you can connect a router to your ISP modem. The first router using LAN IP 192.168.1.1 and has the public IP address on the internet. All connected to the first router is your network 'public '.

Then, you change the LAN IP of the router address second of 192.168.1.1 192.168.2.1. On the side of the internet, the static value IP 192.168.1.2 mask 255.255.255.0, gateway 192.168.1.1 subnet and DNS 192.168.1.1 (or your DNS servers of the ISP, for example check the first router status page). All connected to the router second is "your" private network.

Because of NAT private network is inaccessbile from the network 'public '. Any connection to the private network must be initiated by a computer inside the private network. It's how any internet router protects the LAN from the internet.

Of course, the 'protection' does not work the other way: anything either in the private network can try to access anything in the public network. With this type of installation you cannot protect the public network on the private network. But this kind of separation is usually enough for people.

There is a certain security risk for the private network as all internet traffic through the public network travel and the first router. The first router should be very well protected, i.e. use a router password very strong (instead of the default "admin") and the wireless should also be very well protected (i.e. use WPA2 with AEA and a password strong). The router password is the only thing that protects the router configuration. There is no other coverage, on the side of the router LAN, for example there is no locking if you are trying to connect with the password three times. Thus, the web interface of the router with the password is vulnerable to brute force attack or dictionary. If someone is able to decipher the router password from the first router, it is possible to Flash a custom firmware to analyze all your traffic network, including the internet traffic of the network private. Maybe it's a more theoretical security threat but you should keep in mind that it is possible with this type of installation.

If you want to have separate private network, as well from the public network, you can use three router configuration, i.e. the modem connects to the first router. First router connects to the router to second and third. Now the 'second' and 'third' LAN are entirely separate. The security risk that is mentioned on the first router remains valid.

However, there may be some disadvantages with chained routers: first light passes through two routers. If a router is slower, then the second, it can slow down all of the network connections. For example if you have 50 Mbps internet connection and one of your routers can handle 25 Mbps internet high speed, then all through this router won't be able to use the full speed of the internet. You need to test if there is a problem in your case.

Furthermore, some people have problems with disconnects or Internet unstable when you use a router chained configuration. It may be necessary to restart your routers to get again to the internet.

NAT overlapping networks

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