topic Re: VPN client cannot access server on DMZ in Network Security

VPN client cannot access server on DMZ

IgorHamzic — Fri, 21 Feb 2020 09:26:10 GMT

Hi.

I have the following problem.I have created a new VPN user on Cisco ACS and allowed him access through downloadable ACL to a server in our inside network and server on the DMZ network.He can ping and access server in our inside network but cannot ping or access the server in DMZ.

Here is the configuration.

On the PIX:

access-list DMZ-NONAT permit ip 192.168.254.0 255.255.255.0 192.168.252.128 255.255.255.128

ip local pool Users2 192.168.252.193-192.168.252.222

nat (DMZ) 0 access-list DMZ-NONAT

aaa-server TACACS+ protocol tacacs+

aaa-server TACACS+ (inside) host 10.64.8.20 xxxx timeout 20

aaa-server RADIUS protocol radius

aaa-server RADIUS (inside) host 10.64.8.20 xxxx timeout 20

aaa-server LOCAL protocol local

aaa-server AuthInbound protocol radius

aaa accounting match 151 outside RADIUS

aaa accounting match 150 outside TACACS+

vpngroup myVpnGroup address-pool Users2

vpngroup myVpnGroup dns-server 10.64.8.20

vpngroup myVpnGroup split-tunnel nat0_2

vpngroup myVpnGroup idle-time 1800

vpngroup myVpnGroup max-time 86400

Cisco ACS ACL:

permit ip any host 10.64.8.166 - server on the inside network

permit ip any host 192.168.254.166 - server on the DMZ network

permit icmp any host 10.64.8.166

permit icmp any host 192.168.254.166

deny ip any any

Any advice?

Re: VPN client cannot access server on DMZ

kaachary — Tue, 06 Mar 2007 21:24:02 GMT

Do you have the subnet 192.168.254.0 in the split tunnel ACL ?

HTH,

-Kanishka

Re: VPN client cannot access server on DMZ

IgorHamzic — Tue, 06 Mar 2007 21:33:29 GMT

Part of the nat0_2 ACL:

access-list nat0_2 permit ip 192.168.254.0 255.255.255.0 192.168.252.0 255.255.255.0

I'm rather new to the PIX configuration so any advice will be useful.

Re: VPN client cannot access server on DMZ

kaachary — Tue, 06 Mar 2007 21:53:50 GMT

Do you have any Access group applied on the DMZ interface ?

-Kanishka

Re: VPN client cannot access server on DMZ

IgorHamzic — Tue, 06 Mar 2007 22:21:53 GMT

Found this in the DMZ ACL:

access-list DMZ_access_in6 deny icmp 192.168.254.0 255.255.255.0 192.168.252.0 255.255.255.0

That explains why there isn't any ping and that I'll have to read even more carefully the large PIX ACL configuration I inherited.Thanks for the direction.

Anything in there you see that could cause any other problem?

BTW I'll add 2 more lines to downloadable ACL that will permit user to access the servers using remote desktop.

Re: VPN client cannot access server on DMZ

kaachary — Wed, 07 Mar 2007 10:28:38 GMT

Hi,

If the ACL's are in place, I guess you are good to go.

*Please rate if the post helped.

-Kanishka

Re: VPN client cannot access server on DMZ

IgorHamzic — Thu, 08 Mar 2007 12:19:34 GMT

Everything works fine now.I added extra lines in the ACS ACL and didn't have any additional problems.

Thanks for your help Kanishka.