PIX no DMZ access to

Similar Questions

• PIX: Allowing servers in the DMZ access inside Server

  Hello

  I'm building a PIX 520 from scratch using 6.2 (2) and PDM 2.1 (1). I have 3 interfaces:

  outdoors (sec0) - xx.xx.xx.xx

  inside (sec100) - 10.100.1.0/24

  DMZ (sec10) - 172.16.254.0/24

  All was well with the modules until I started the task to allow the dmz hosts access internal hosts. I'm having problems as soon as I create an access for example rule:

  access-list permits dmz_access_in tcp host 172.16.254.20 host 10.100.1.35 eq ldap

  Problem 1:

  PDM alerts must be a static translation for 10.100.1.35 between the inside network and the DMZ. I would like the 172.16.254.20 server to the access server to the 10.100.1.35 using his real address of 10.100.1.35. Can I just give these commands:

  static (inside, dmz) 10.100.1.0 10.100.1.0 netmask 255.255.255.0 0 0

  dmz_inbound_nat0_acl ip access list allow any 10.100.1.0 255.255.255.0

  NAT (dmz) 0-list of access dmz_inbound_nat0_acl outside

  and then:

  access-list permits dmz_access_in tcp host 172.16.254.20 host 10.100.1.35 eq ldap

  Access-group dmz_access_in in dmz interface

  .. .will this work without problems?

  Problem 2:

  The rule of implicit outbound traffic to DMZ is broken - why? I need servers DMZ in order to access the internet without any discomfort.

  When I try and insert another rule to this effect, the following is inserted in the PIX config:

  dmz_access_in ip 172.16.254.0 access list allow 255.255.255.0 any

  This command now allows any server DMZ access all devices on my internal network! How can I solve this?

  I hope someone can help... Thanks in advance,

  Tariq.

  A problem 1, you don't need the nat statement 0 and correospnding-access list. The static method is sufficient.

  Problem 2: as you apply an access list to the DMZ interface, you must expand to include Internet access as well. If this is what you need, I would try something like this:

  access-list permits dmz_access_in tcp host 172.16.254.20 host 10.100.1.35 eq ldap

  access-list permits dmz_access_in tcp host 172.16.254.30 host 10.100.1.35 eq ldap

  ...

  ...

  etc. to allow the required access to the Interior.

  deny the dmz_access_in of the ip access list any 10.0.0.0 255.0.0.0

  dmz_access_in ip access list allow a whole

  Of course, you want to settle this as requires it.

• Client VPN on PIX needs to access DMZ

  VPN clients 3.5 ending PIX 6.X cannot access hosts on a PIX DMZ interface. Journal reports of error that there is no 'translation group available outside' for the subnet of the VPN Client (from the vpngroup pool).

  I should add the VPN client subnet to a nat (outside) device?

  Can I add it to the nat inside?

  Can I just add static to the DMZ hosts within the subnet interface because VPN clients can access the inside hosts?

  (I have the subnets in the nat 0 sheep ACL)

  Thanks and greetings

  JT

  You'll need to add is nat 0. You say in your () you have an acl sheep, for the perimeter network or the inside interface? You use the same access list to the sheep inside and dmz? You should separate if you use separate access list. Is your pool of client on a different subnet than your home network and dmz? It must be something like this:

  Customer IP local pool 192.168.1.1 - 192.168.1.254

  IP, add inside 10.10.10.1 255.255.255.0

  Add 10.10.20.1 dmz IP 255.255.255.0

  access-list sheep by 10.10.10.0 ip 255.255.255.0 192.168.1.0 255.255.255.0

  nonatdmz list of access by IP 10.10.20.0 255.255.255.0 192.168.1.0 255.255.255.0

  NAT (inside) 0 access-list sheep

  NAT (dmz) 0-list of access nonatdmz

  If this is correct then clear x, wr mem, reload. I hope this helps.

  Kurtis Durrett

  PS

  If he did not, only can recommend the upgrade your client and pix because that is exactly how it should look, and if its does not work you are facing an additional feature you want.

• PIX 515 DMZ problem

  Hello

  We have some difficulty in moving traffic in and out of a Cisco PIx 515 firewall. We use it with two demilitarized. The first DMZ has a mail in her Server (before end mail server) that communicates with a different mail server (back end mail server) inside, it is called DMZ1. The second DMZ (DMZ2) has some users who are expected to pass through the firewall to the outside and use the internet and must have access to the e-mail DMZ1 server. Inside users must be able to use the Internet and can access DMZ1. Here's the important part of our Setup.

  What we were doing, we can correctly access from inside, inside users to access internet permit to join the DMZ1 e-mail server and the mail in DMZ1 server the inside. Our problem is that we are unable to browse the internet on the DMZ1 Messaging server if we put DMZ1 as gateway ip address on that server and the address ip of the DNS of the ISP is propely located on the same machine. Also, we could not do DMZ2 users browse the internet, although we allowed the www Protocol in the fromOut access list. One last question, can we do the DMZ2 a DHCP server on the interface on the PIX and do distribute ip addresses to users on that subnet only? Thanks for any help in advance.

  6.3 (3) version PIX

  interface ethernet0 car

  Auto interface ethernet1

  Auto interface ethernet2

  Auto ethernet3 interface

  !

  ethernet0 nameif outside security0

  nameif ethernet1 inside the security100

  nameif ethernet2 dmz1 security50

  nameif ethernet3 dmz2 security40

  !

  fixup protocol dns-length maximum 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 2000 skinny

  fixup protocol smtp 25

  fixup protocol sqlnet 1521

  fixup protocol tftp 69

  !

  names of

  !

  IP outside X.Y.Z.163 255.255.255.248

  IP address inside 192.168.0.9 255.255.255.0

  dmz1 192.168.10.1 IP address 255.255.255.0

  IP address dmz2 192.168.20.1 255.255.255.0

  !

  fromOut list of access permit icmp any host X.Y.Z.162 source-quench

  fromOut list of access permit icmp any host X.Y.Z.162 echo-reply

  fromOut list of access permit icmp any unreachable host X.Y.Z.162

  fromOut list of access permit icmp any host X.Y.Z.162 time limit

  fromOut list access permit tcp any host X.Y.Z.162 EQ field

  fromOut list access permit tcp any host X.Y.Z.162 eq telnet

  fromOut list access permit tcp any host X.Y.Z.162 eq smtp

  fromOut list access permit tcp any host X.Y.Z.162 eq www

  !

  fromDMZ1 list of access permit tcp host 192.168.10.2 192.168.0.0 255.255.255.0

  fromDMZ1 list of allowed access host ip 192.168.10.2 192.168.0.0 255.255.255.0

  !

  fromDMZ2 list of access allowed tcp 192.168.20.0 255.255.255.0 192.168.10.0 255.255.255.0

  !

  pager lines 24

  !

  Outside 1500 MTU

  Within 1500 MTU

  dmz1 MTU 1500

  dmz2 MTU 1500

  !

  Global (outside) 1 X.Y.Z.164 netmask 255.255.255.248

  Global (outside) 2 X.Y.Z.165 netmask 255.255.255.248

  NAT (inside) 1 192.168.0.0 255.255.255.0 0 0

  NAT (dmz1) 1 192.168.10.2 255.255.255.255 0 0

  NAT (dmz2) 2 192.168.20.0 255.255.255.0 0 0

  static (inside, dmz1) 192.168.0.0 192.168.0.0 netmask 255.255.255.0 0 0

  static (dmz2, dmz1) 192.168.0.0 192.168.0.0 netmask 255.255.255.0 0 0

  static (dmz1, external) X.Y.Z.162 192.168.10.2 netmask 255.255.255.255 0 0

  !

  Access-group fromOut in interface outside

  Access-group fromDMZ1 in interface dmz1

  Access-group fromDMZ2 in the dmz2 interface

  Route outside 0.0.0.0 0.0.0.0 X.Y.Z.161 1

  Hi jamil,.

  There is a sentence on the URL I sent you, you can now activate dhcp option within the interface. Just check this...

  REDA

• PIX 501 ICMP access list Question

  According to the book, I have the pix and firewall that I know of dealing with routers and switches access lists define what traffic is allowed outside the network. With pix access lists can only be applied one way, to the interface they enter, not leaving. It's my understanding, but when I do an ICMP command:

  PIX1 (config) # access - list ethernet1 permit icmp any any echo response

  PIX1 (config) # access - list icmp permitted ethernet1 everything all inaccessible

  Access-group ethernet1 PIX1 (config) # interface inside

  This does not work, but if I apply the access group to the external interface it works. I understand why it is like that.

  Thank you

  This works because the pix is not aware of session state for the way icmp traffic that it does for tcp and udp.

  By default, less access to a high to an interface is allowed, unless you have an acl applies to the interface of higer - then only what the acl permits will be allowed. So you can send outbound icmp echo request. However, for the response to be returned, you must allow that explicitly in an acl that is applied on the external interface, because the pix won't allow any outside traffic by default.

  Even for icmp unreachable, although I want to put in custody to be part of the config. Allow only the unattainable due to the ttl expired to facilitate detection of mtu path, not all unachievable.

  Let me know if it helps.

• PIX 535 and access lists

  Hello

  We have a Cisco PIX 535. By default, traffic on one more secure interface with a lower security level is allowed, what is?

  OK, I have a doubt, I had to define an access list entry to allow a telnet connection between inside and outside. There is no rule against that traffic, but without this rule the telnet connection cannot be established.

  And my question is: why? It is not supposed to be allowed by default?

  Thanks in advance.

  Higher default-> bottom is allowed... However, once you add instructions permit, it is implicitly deny all at the end. So, if you allow ftp and ssl web... so by default, any other traffic is denied and you need to be precise with your permit.

• PIX 515E DMZ NAT

  We have recently acquired a new partner that is connected by a frame relay to our DMZ.

  Here's my problem. The router (frame relay) is in our DMZ their public addresses to our addresses in the DMZ to NATS

  172.16.10.90 ftp port

  172.16.10.4 port 9100

  172.16.10.5 port 9100

  172.16.10.6 port 9100

  I want to take the source address and the NAT inside our network:

  10.10.2.90

  10.10.2.4

  10.10.2.5

  10.10.2.6

  I don't have physical devices in the DMZ for these addresses and I have not been able pass traffic back from the demilitarized zone. I have access lists allowing traffic to DMZ 172.16.10.x inside the 10.10.2.x via the appropriate ports.

  Currently, we have our Web server and a mail gateway in the demilitarized zone, I want to do this without changing the overall or to compromise the DMZ rules that are currently in place.

  Thank you for your help

  This feature is available in 6.3 + codes

  upgrade to the latest code what 6.3.4

• PIX 515E: blocks access to external sites

  We recently had an internal problem with the staff to access some Web sites of 'social' in the office. My supervisor asked me if we can easily block access to these types of sites using our current hardware. Is it possible or will we need to acquire another device?

  Thank you.

  I agree with the previous poster. But if you have only a few of these 'social' sites, you could do with your current PIX w/o too much administrative burden.

  Use DNS (nslookup) to find the IP address of the sites you want blocked and create an ACL and apply to the inside interface. You'll be in charge yourself to ensure that you keep the ACL is updated.

  or...............

  If you have a router Cisco IOS whereby all related Internet traffic transits, you can create a political and/or the route map map using nbar to match with a URL and everything just black hole / deny traffic.

  Here is a sample of 'code red' block by using these methods:

  http://www.Cisco.com/warp/public/63/nbar_acl_codered.shtml#MethodB

• VPN for PIX 515 allowing access to a single host

  I have already setup on my PIX 515 a VPN connection, which allows the user to connect to our network via a cisco VPN client to access network resources.

  I want to configure now is an another VPN connection that external users can use but would only allow access to a host.

  E.g. I would like to VPN in my site but would be allowed to access the 10.1.1.1 on my network.

  How can I do this? What I have to install VPNGROUP another and somehow an access list to allow only traffic to a host of configuration. Can anyone help with the correct syntax for the PIX.

  Thank you

  Scott

  You will now have a bunch of commands "vpngroup" in your PIX, simply go into config mode and add more commands 'vpngroup' but with a different groupname. The VPN client then uses this group name to connect to the PIX.

  Another way to allow only access to a host for this PIX is to split tunnelling on this group, as well as in the tunnel of split ACL set only as a host.

• PIX telnet/ssh access to the VPN Lan2Lan

  Scenario of several Lan - Lan IPSEC VPN between PIX F/Ws.

  I need to remotely access / these PIX via Telnet/SSH & would prefer to do it through the VPN tunnel.

  NB, I tried telnet/ssh configuration for both inside/outside of my source but can't hit the PIX.

  Because the Tunnel is actually inside-inside I'm trying to connect to the inside interface of the pIX.

  You can do it now in 6.3 code with the command "access management". See http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_sw/v_63/cmdref/mr.htm#1137951 for more details.

• PIX Firewall 525 access list problem

  Hello.

  I have the following problem. After insertion of an access list, despite seeing the packages associated with the list, they do not "match", that is, it is as if the list wasn't doing his job.

  Who can be the cause of this behavior?

  PIX 525 model

  IOS 6.3 (4)

  Thank you.

  Marulanda Ramiro Z.

  Are all of syslogs sent properly to the remote host? If so, I would say that the udp connection is never closed by the PIX. Let's say that the connection never hit the timeout in the pix config. If the connection remains open and doesnot increments the hit count for your access list. I have a PIX that makes the same behavior.

  The increase in the number of accesses is also based on the connection and not on each packet passing through the PIX.

  You can use a debug command to see the packets through the PIX.

  HTH

  Mike

• a site and on the same pix vpn remote access

  I was wondering if anyone had an example of configuration, pix running 6.3 (4).

  He attached in pdf format

• PIX and SSH - access to PIX via SSH

  Need help with PIX and SSH

  Objective: Connect to PIX via SSH from the 10.1.1.50 IP address behind inside the interface on the PIX using local aaa on PIX.

  Current settings:

  hostname pix1

  example.com domain name

  CA generates the key rsa 1024

  example username password abc123 privileges 15

  include authentication AAA ssh inside 10.1.1.50 255.255.255.255 local

  SSH 10.1.1.50 255.255.255.255 inside

  Thanks for any help!

  Try this:

  AAA-server local LOCAL Protocol

  the ssh LOCAL console AAA authentication

• Help the PIX 501 - cannot access startup.html

  I'm new to the network and has received a job to configure the PIX 501 firewall.

  The fact is:

  We use IP table rules as a firewall on a linux machine. My pc is connected to a switch. So I use the yellow network cable to connect the port of the Pix 501 0 to the port in the switch. Then I disconnect my pc of swich cable and plug into the port of the Pix 501 1.

  My pc is to use a static ip address before. I try to change to automatically get an IP address, but it will not work. So I changed the setting and use the IP address originally. Pop up message network connection icon says that the local connection is enabled. But when I try to ping 192.168.1.1, request time-out. Also I can't acess the https://192.168.1.1/startup.html.

  I have a look at Books Online cisco and shootings of disorder, but most of them talk about the configuration or more advance features. I'm still on the very basic level to try to connect to the firewall.

  I hope someone can help me. All ideas and questions are welcome. Thank you.

  Your IP address should be fine. You do not want to have the PIX connected to your local network, even if you have the Linux firewall as well as this will cause a conflict. Keep the PIX the LAN for now. Your DNS configuration will have no effect because the url you are trying to reach is based on the IP address and not the domain name if your PC has nothing to look for.

  You have to check the cable that you use - if your PIX has only an 'inside' interface, then you must use a crossover cable. If he has four so it's built in switch for a straight cable will be fine. Is what PIX model?

  After checking the cable - see if you can console in the firewall - use the blue cable that came with the PIX and set up a connection (hyper terminal) terminal with the help of 9600, 8, no 1. If you can console and then you can stick in a basic configuration you can get.

• Vpn client access to the DMZ host

  I'm having a problem where my customers who establish a VPN with Pix 515 cannot access hosts on the DMZ. VPN clients can access hosts inside network without any problems. I discovered that when I make a route to trace from a client computer that has established a VPN connection to a host on the DMZ, he tries to go through the default gateway of computers instead of the client from cisco. Any ideas?

  More information:

  When a client connects with the PIX over the VPN, it is given the internal DNS servers and the DNS Server internal, we have a host entry that says "www.whatever.com" 2.2.2.2 (this is the DMZ host). Customers within the network can access this host with problems, it's just the customers who establish a VPN connection. But the VPN Clients can access "www.whatever.com" using the public ip address. The problem is that if remove us the entry from the host on the DNS server so that the name of "www.whatever.com" decides the public ip address customers inside will not be able to access the DMZ host. The names and IP numbers are not real just using those as an example.

  Any help would be apperciated. Thank you

  You'll currently have something like this in your config file:

  sheep allowed ip access-list

  NAT (inside) 0 access-list sheep

  This tells the PIX not to NAT any traffic from inside interface, which is to go to a VPN client. You need the same thing but for the DMZ interface, then add the following:

  sheep allowed ip access-list

  NAT 0 access-list sheep (dmz)

  Who should you get.