PIX firewall Security Guide

Similar Questions

• PIX firewall Image issue

  Hello

  I'm without a firewall PIX 7.0 to 6.3 decommissioning. I faced the problem during the restart of the PIX.

  The error given below,

  Start the first image in flash

  Image must be at least 7-0-0-0 error in the flash file: / pix635.bin

  No bootable Flash image. Please download an image from a network server

  in monitor mode

  CISCO PIX FIREWALL SYSTEMS

  BIOS version shipped 4.3.207 01/02/02 16:12:22.73

  Compiled by Manu

  128 MB OF RAM

  Did you follow the exact downgrade procedure indicated on this link... you point the image as shown 6.3.x

  downgrade tftp://tftpserverip/pix63x.bin

  PIX downgrade procedure 7.x to 6.3.x

  http://www.Cisco.com/en/us/docs/security/ASA/asa70/pix_upgrade/upgrade/guide/pixupgrd.html#wp1810347

  in any case, you can always redownload the 6.3.5 new code in monitor mode.

  http://www.Cisco.com/en/us/products/HW/vpndevc/ps2030/products_tech_note09186a0080094a5d.shtml#upbootormon

  Let us know how it works.

  Rgds

  Jorge

• How to limit the ICMP on the PIX firewall.

  Guys good day!

  I have a dilemma with regard to limiting ICMP users browsing to other networks such as other demilitarized interns.

  I know that, to allow ICMP to pass through interfaces, you will need to create an ACL such as below:

  access-list DMZACL allow icmp a whole

  Users require this config ping a server on the DMZ, but it is a security risk.

  To minimize, I have a group of objects created in order to identify hosts and networks is allowed to have access to the echo-replies.

  Again, this is a problem since many host who extended pings just to monitor the connectivity server and its application.

  Do you have other ideas guys?

  As to limiting the echo answers on the PIX. As first 5 echo request succeed with 5 echo-replies and the rest would be removed.

  This could be done?

  Thank you

  Chris

  Hello.. I don't think you can do this by using an ACL on the PIX, however, you might be able to stop the ICMP sweeps by activating CODES signatures using the check ip command you... For more information see the link below

  Guidelines of use Cisco Intrusion Detection System (IDS Cisco) provides the following for IP-based systems:

  ? Audit of traffic. The application of signatures will be audited only as part of an active session.

  ? Apply to the verification of an interface.

  ? Supports different auditing policies. Traffic that matches a signature triggers a range of configurable

  actions.

  ? Disables signature verification.

  ? Always turns the shares of a class of signature and allows IDS (information, attack).

  The audit is performed by looking at IP packets to their arrival at an input interface, if a packet triggers

  a signature and the action configured does not have the package, and then the same package may trigger another

  signatures.

  Firewall PIX supports inbound and outbound audit.

  For a complete list signatures of Cisco IDS supported, their wording and whether they are attacking or

  informational messages, see Messages in Log System Cisco PIX Firewall.

  See the User Guide for the Cisco Secure Intrusion Detection System Version 2.2.1 for more information

  on each signature. You can view the? NSDB and Signatures? Chapter of this guide at the following

  website:

  http://www.Cisco.com/univercd/CC/TD/doc/product/iaabu/csids/csids1/csidsug/SIGs.htm

• PIX firewall software

  Hi guys,.

  I am looking to download IOS ver 4,0000 for PIX 515E, but can't seem to find anywhere in the downloads/security section. The only version they have is 8.0.4.

  Anyone know where I could find all earlier versions?

  Thank you very much

  Elena

  Elena, when you go to download box, choose any version 8.0, then window right side you will see a text saying previous software release click on this hyperlink and it will take you to all versions including 7.x

  http://tools.cisco.com/support/downloads/go/ImageList.x?relVer=8.0.4&mdfid=277072390&sftType=PIX+Firewall+Software&optPlat=&nodecount=2&edesignator=ED&modelName=Cisco+PIX+515E+Security+Appliance&treeMdfId=268438162&treeName=Security&modifmdfid=&imname=&hybrid=Y&imst=N&lr=Y

  but here's the direct link

  http://www.Cisco.com/cgi-bin/tablebuild.pl/PIX

  Concerning

• Allowing L2TP to pass through PIX Firewall

  Hi all

  Can someone help me on how to allow inbound l2tp connection on a pix? Behind the pix firewall, there is an ISA server as a vpn l2tp server. I can't allow l2tp on the pix.

  Thank you very much!

  Please use this doc as a guide-

  http://www.Cisco.com/en/us/products/HW/vpndevc/ps2030/products_configuration_example09186a0080094a5a.shtml

  Jon

• Access list ID # on a PIX firewall

  Is anyone know what of the identifier access list on a pix firewall?

  Standard IOS = 1-99

  Extended IOS is 100-199.

  SW = PIX?

  There is no "limit" by Word to say in the Pix. These limits are in IOS because they define what 'type' of acl, it's IE APPLETALK, IPX, IP etc etc. Pix IP is therefore not necessary for this type of identification.

  access-list 100000000000000; 1 items

  allow line of the access list 1 100000000000000 ip any a (hitcnt = 0)

  Jason

• Cisco ACS and Pix Firewall

  I have configured the aaa authentication in the pix firewall to see the ACS RADIUS Server for verification of the user. If the ACS server becomes unavailable, then I could not connet the pix firewall.

  In the router, I have the configuration option

  AAA authentication login default group Ganymede + local

  that tells the router first looking for a radius server and if is not available connect through the local database.

  Is there an option in the Cisco pix firewall to connect using local information if ACS is not available?

  Thanks in advance

  Hello

  PIX back up method to entered the unit in the event of server failure aaa works on 6.3.4 code and above. In the codes plus late 6.3.4 If the RADIUS server fails it is impossible to get in unless password recovery. "However if we have not configured for console aaa authentication than user name: pix and password: cisco" works by default.

  Kind regards

  Mahmoud Singh

• PIX firewall problem

  I have two servers, one in pix inside and the other in the demilitarized zone. I wanted to set them up so that they can communicate with routers and switches

  Located outside the pix firewall.

  My inner Server works fine, able to go Internet and able to comminicate with all devices located outside the Pix Firewall. Here is reference configuration

  of insideserver.

  outside_acl list extended access allowed host x.223.188.0 255.255.255.0 172.28.32.50 ip

  outside_acl list extended access permit ip host host x.219.212.217 172.28.32.50

  access-list extended sheep permit ip host 172.28.32.50 host x.219.212.217

  access-list extended sheep permit ip host 172.28.32.50 x.223.188.0 255.255.255.0

  inside_acl list extended access permit ip host 172.28.32.50 all

  But my DMZ server does not work. However, I made the same configuration with respect to the server on the inside. Not able to communicate with outside DMZ server

  network.

  outside_acl list extended access allowed host x.223.188.0 255.255.255.0 172.28.92.72 ip

  outside_acl list extended access permit ip host host x.219.212.217 172.28.92.72

  access-list extended sheep permit ip host 172.28.92.72 host x.219.212.217

  access-list extended sheep permit ip host 172.28.92.72 x.223.188.0 255.255.255.0

  dmz_acl list extended access permit ip host 172.28.92.72 all

  If I create a static entry for your DMZ SNMP server.

  static (edn, external) 172.28.92.72 172.28.92.72 netmask 255.255.255.255

  He starts to communicate with external devices, but stops Internet run on this server. same configuration

  works with the server on the inside, but not with dmz server.

  NAT (inside) 0 access-list sheep

  NAT (inside) 3 172.28.32.0 255.255.255.0

  NAT (dmz) 3 172.28.92.0 255.255.255.0

  Global interface 3 (external)

  Your static entry is bypassing your nat (dmz) 3 entry. You can do NAT exemption instead, as you do to your home

  1. remove the static entry (followed by clear xlate)

  Add - nat 0 access-list sheep (dmz)

  I suggest to use two acl different sheep, one for each interface.

  Ex: nonat_inside

  nonat_dmz

• How can I clear counters access-list on a pix firewall

  How can I erase the hitcounts on an on a pix firewall access list without resetting the pix?

  It would be clear access-list on a router counters.

  Thanks in advance

  Steve

  access list counters Clear

• To block P2P traffic on the PIX firewall

  What will be the mechanism, and how we can block the traffic of P2P applications like eDonkey, KaZaa and Imesh etc on the PIX firewall.

  Hello

  You can find the info here:

  http://www.Cisco.com/en/us/Tech/tk583/TK372/technologies_tech_note09186a00801e419a.shtml

  I hope this helps.

  Jay

• PIX firewall vpn Sonicwall

  Hello.

  My question is this.

  It is possible to establish a VPN between a PIX Firewall and Sonicwall firewall?.

  To be like that, where I can find documentation on the matter?

  Thanks in advance.

  Dear.

  Both Sonicwall conforms to standards, which they do, then Yes, you can create a VPN between them.

  I don't think we have PIX, Sonicwall example config specifically, but the config on the PIX is still pretty standard, no matter what you connect to.

  SonicWALL has an example here: ftp://ftp.sonicwall.com/pub/info/vpn/CiscoPIX.pdf

• Place a server behind a PIX firewall production

  Hi all

  We currently have a web server that is connected to the Internet directly (multiple addressable IPs belonging to 5 different ranges of class C, with a soft firewall).

  There are several Web sites, some of them with their own IP addresses, some of them sharing IPs with other sites.

  We intend to put a server behind a PIX firewall and convert addressable IP addresses to private IPs with the static mapping on the PIX.

  We plan use a PIX with two (2) interfaces.

  You think it of feasible or are there things that I'm on?

  Some things I'm not sure about:

  Since there are several C class IPs assigned to the server and therefore 5 gateways defined on a NIC, one for each class, how that is defined on the PIX? 5 separate roads or...?

  We need to use a kind of "virtual interfaces", one for each class C subnet?

  This is an example of a "final product":

  Web request to the 204.xxx.85.10 IP addressable would be directed to the private IP address: 10.xxx.85.10.

  Web request to the 204.xxx.86.10 IP addressable would go to 10.xxx.86.10 etc etc.

  Any help you could provide in this regard will be GREATLY apprechiated!

  Hello

  Please provide a topology (plain text would work). I can't tell from your description, if you have a perimeter router in front of the Pix. In addition, when you write statements of static road on the Pix, you must include an interface as follows

  Route if_name IPAddress netmask gateway_ip

  Once you post this information, I'll take another reading to better understand your situation.

  Thank you

• Username in the Pix Firewall

  When I do a command 'See logging' in my Cisco Pix Firewall (6.3), I am able to see the message below

  605005: x.x.x.x/33652 for eth1:y.y.y.y/telnet for the user authorized login «»

  In the message above, why the user name is not printed?

  your config has.

  Console telnet AAA authentication GANYMEDE + | RAY | LOCAL '?

• Security IOS vs PIX Firewall / ASA

  Could someone point me to some docs on cisco.com in comparing the use of an IOS on a secure router & using a cisco firewall? I want to use a SRI w/fix ios if possible but don't know if I can lock the outside of the network as well as I could with a pix or asa, so I want to make sure I'm doing everything I can and do the right thing. Any help is greatly appreciated.

  Hello

  There is a discussion in this forum on this topic; Check "Firewalling: PIX vs IOS Firewall" last conversation was released January 10, 2006. Let me know then if it helps.

  Rgrds,

  Haitham

• As a transparent (bypass) PIX firewall?

  I'm doing a school project that involves the use of a firewall PIX between the ISP and the edge of the network router. The goal is to make the network as secure as possible using only the PIX. Ideally, I'd like that it if an attacker could not even see the PIX was there. It made me think if the PIX can act as a transparent firewall, otherwise said, not having all the IPS assigned to the interfaces nor do no routing, simply inspect/forward traffic between inside/outside interface. Otherwise, I'll have to create a small 30 between the ISP and the PIX from the outside, and the border router and the route PIX inside and between them.

  If I do the latter, can you give me advice on how to secure more PIX? Here is my config:

  interface ethernet0 10full

  interface ethernet1 100full

  ethernet0 nameif outside security0

  nameif ethernet1 inside the security100

  activate the password encrypted x

  passwd encrypted x

  pixfirewall hostname

  domain pix.local

  fixup protocol dns-length maximum 512

  No 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

  access-list 100 permit icmp any any echo response

  pager lines 24

  Outside 1500 MTU

  Within 1500 MTU

  IP 10.0.0.1 address outside 255.255.255.252

  IP address inside 10.0.0.5 255.255.255.252

  IP verify reverse path to the outside interface

  IP verify reverse path inside interface

  IP audit name AttackPolicy attack action alarm down reset

  IP audit name InfoPolicy info action alarm down reset

  verification of IP outside the InfoPolicy interface

  interface IP outside the AttackPolicy check

  verification of IP within the InfoPolicy interface

  verification of IP within the AttackPolicy interface

  disable signing verification IP 2000

  disable signing verification IP 2004

  don't allow no history of pdm

  ARP timeout 14400

  NAT (inside) 0 0.0.0.0 0.0.0.0 0 0

  Access-group 100 in external interface

  Route outside 0.0.0.0 0.0.0.0 10.0.0.2 1

  Timeout xlate 03:00

  Timeout conn 01:00 half-closed 0:10:00 udp 0: CPP 02:00 0:10:00 01:00 h225

  H323 timeout 0:05:00 mgcp 0: sip from 05:00 0:30:00 sip_media 0:02:00

  Timeout, uauth 0:05:00 absolute

  GANYMEDE + Protocol Ganymede + AAA-server

  RADIUS Protocol RADIUS AAA server

  AAA-server local LOCAL Protocol

  No snmp server location

  No snmp Server contact

  SNMP-Server Community public

  No trap to activate snmp Server

  enable floodguard

  Telnet timeout 5

  SSH timeout 5

  Console timeout 5

  Terminal width 80

  Any help is appreciated! Thank you!

  Chris

  The PIX can now act as a layer 2 firewall, this feature will be in the next major version of the code should be out later this year. For now you will need a small subnet between the ISP and the PIX.

  If you do not want to see the PIX then the first thing is to make sure it does not meet the pings. Use the "icmp" command (http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_sw/v_63/cmdref/gl.htm#wp1026574) for. Make sure you allow ICMP unreachable to the outside interface well and Path MTU Discovery can work properly (http://www.cisco.com/warp/public/105/38.shtml#pmtud_fail).

  Other than that, it seems very good, pretty standard.