How PIX cross access lists?

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• PIX 525 access-list

  I know it must be simple, however, I have some difficulty doing that work. I use version 5.3

  I'm trying to block access to the internet at 172.16.39.X. whatever it is on this network should NOT be able to access the internet.

  I use the list of access and access - group commands but I must have some syntax errors or something as there doesn't seem to be blocking access. Could someone provide a concrete syntax for this address with 255.255.255.0 subnet so I can see if perhaps I simply make a mistake in the entry. I am new to PIX so I wouldn't be really surprised.

  Thank you

  Dave

  You can do this in several ways:

  1. you can exclude this your NAT range. This will not allow this range out to the internet.

  2. on your inside interface, apply this rule:

  insideACL list access deny ip 172.16.39.0 255.255.255.0 any

  insideACL ip access list allow a whole

  I hope this helps.

• 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

• Pix access lists

  I am facing convert statements leads on our PIX 520 access lists. Is there a better way to do this will be as little as possible traffic interruption? For example, to create access lists and then remove the conduit, or vice versa?

  Second, is there a priority recommended in order to access list?

  Hello

  This is a very good paper on the conversion of lines to the ACL, also when writing ACL always have your most important ACL on top of the ACL work from the top down. When you make changes to the ACL or static lines always issue the command clear xlate and save with RAM command.

  http://www.giac.org/practical/GSEC/Bill_Donaldson_GSEC.pdf - by Bill Donaldson, GSEC.

  If you want more information/inf, then let me know.

  Thank you / Jay.

• (Update) Turbo access lists

  Hi all

  Can someone tell me how to compiled access lists make the decision on how they segment lists access in first level lookup tables

  I'm not looking for a doctoral thesis on how it works, but a general outline of how it decides and compiles.

  concerning

  Scott

  Scott,

  OK, c is always a foot 10 000 discovered here by reading the specifications made my brain hurt ;)

  Essentially, what we do with Turbo ACL, is we take the internal game of access lists and build a set of data tables. Each ACE in the ACL Gets a value of 'index' are entrusted to him. This index value is calculated according to an algorithm that looks at the IP address source IP dest, Protocol, port L4, etc... When a package arrives in a PIX which configured ACL turbo, this same 'indexing' occurs and a value is determined. We then use this value which is calculated for the new package and compare it to the assigned values to the individual ACE in the data tables to find the ACE the new package to match and then to process packets accordingly.

  This process of looking turned out be MUCH faster than the linear search standard, together with a linked list (normal) ACL.

  In any case, it's more or less the bottom of it. Hope this helps to enlighten us.

  Scott

• access-list [line-num]

  Too often, I see in the access list statement, there is a line number set to 1, like this:

  permit access-list id_test 1...

  Desc the doc said: "The line number to insert a note or an access control element (ACE)."

  I can understand his 'writing' but never 'really' understand. :)

  Someone could it explain by giving an example?

  Thank you for helping.

  Scott

  PIX (config) # access-list id_test sh

  id_test list of access; 5 elements

  id_test of access list row 1 will allow any host 1.1.1.1 (hitcnt = 0)

  id_test of access list row 2 allow accord any host 2.2.2.2 (hitcnt = 0)

  id_test of access list row 3 will allow any host 3.3.3.3 (hitcnt = 0)

  line 4 of the id_test of access list allow accord any host 4.4.4.4 (hitcnt = 0)

  access list id_test line 5 will allow any host 5.5.5.5 (hitcnt = 0)

  PIX (config) # access - list id_test line 2 Note Hello

  PIX (config) # access-list id_test sh

  id_test list of access; 5 elements

  id_test of access list row 1 will allow any host 1.1.1.1 (hitcnt = 0)

  Hello from note access-list id_test line 2

  id_test of access list row 3 will allow any host 2.2.2.2 (hitcnt = 0)

  line 4 of the id_test of access list allow accord any host 3.3.3.3 (hitcnt = 0)

  access list id_test line 5 will allow any host 4.4.4.4 (hitcnt = 0)

  id_test of access list line 6 will allow any host 5.5.5.5 (hitcnt = 0)

  allowed for pix (config) # access - list id_test line 1 icmp any host 1.1.1.1

  PIX (config) # access-list id_test sh

  id_test list of access; 6 items

  allowed to Access-list id_test line 1 icmp any host 1.1.1.1 (hitcnt = 0)

  id_test of access list row 2 allow accord any host 1.1.1.1 (hitcnt = 0)

  Note access-list id_test line 3 Hello

  line 4 of the id_test of access list allow accord any host 2.2.2.2 (hitcnt = 0)

  access list id_test line 5 will allow any host 3.3.3.3 (hitcnt = 0)

  id_test of access list line 6 will allow any host 4.4.4.4 (hitcnt = 0)

  access list id_test line 7 will allow any host 5.5.5.5 (hitcnt = 0)

  TRIS-NOC-FW1 (config) #.

  the golden rule of the acl, is that it works in order, from top to bottom. with the line number, you can precisely insert the new entry of acl or note everywhere where you want.

  for example, imagine you have a 200-entry acl, and now you want to allow one host before the other refuse registration. of course you don't want to interrupt the network by UN-apply and reapply the entire acl. in this case, the line number to save life.

• I am running xp sp3 and cannot find the movie maker software in the all programs list, how can I access this software application

  original title: access to Movie Maker

  I am running xp sp3 and cannot find the movie maker software in the all programs list, how can I access this software application?

  You are welcome and thank you for the comments.

• How can I access a journal or a report that lists the results of an operation of Disk Defragmenter?

  How can I access a journal or a report that lists the results of an operation of Disk Defragmenter?

  Windows Defrag is supposed to run silently in the background.
  Unlike XP, it does not offer a newspaper to the user, as far as I understand.

  If you schedule a defrag, you can let it run in the background and forget it.

  Schedule defragmentation
  Start button > Search box, type Task Scheduler > pressenter > invite uac, click on continue or enter the admin password >
  (click on the pointer before) to expand Task Scheduler Library >
  expnad Microsoft >
  Expand Windows >
  Click on Defrag > the middle column, click scheduled d.... >
  right column, click Properties > click triggers tab at the top > click on Edit > select / adjust how to defragment Appendix to be executed, select options >
  at the bottom of the box, place a check on " enable " >
  OK > OK yet > exit the Task Scheduler window.

• 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

• 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.

• Question of Access-list PIX

  The following access list works on a cisco router, however, the list will not work on the PIX (I change the mask to wildcards to a for the PIX subnet mask).

  Router (works)

  access allowed test tcp 192.168.1.50 list 0.0.0.5 host 10.10.10.1 eq 80

  PIX (does not work)

  access list permit test tcp 192.168.1.50 0.0.0.10 host 10.10.10.1 eq 80

  I get the error on the PIX:

  ERROR: Source, mask <192.168.1.50, 0.0.0.10="">address not pair

  Is it possible to group IP addresses as well as on the PIX in a similar way as Cisco IOS?

  Thank you!

  Domo Arigato!

  You can use

  192.168.1.48 255.255.255.248 for the source or if they are many hosts you must insert an individual entry for each source.

  Of course you can refuse the host 192.168.1.49 and

  Let the others allow 192.168.1.48 255.255.255.248

• New to pix, need help with "debug access list of all the" command

  I have a pix 515 v6.3. I am tring to use then "debug access list of all the" command to see what traffic is stopped by my access list. However, I don't get any output. I turn execution of the command, but nothing happens. Other debug commands give the console. Perhaps, I do not understand what "debug to access list of all the" is used for. Any help that can be provided would be greatly appreciated.

  Tim

  Also try following the commands of logging

  LOGG on

  LOGG buff 7

  term Lun

  M.

• Access list in a PIX?

  I have the access-list applied on my "external" my PIX interface and I'm trying to make it so pings coming from the 'inside' book, but those who come of the? outside? in case of failure.

  access-list outside permit icmp any any echo response

  list a whole outside access allowed icmp time-exceeded

  access outside allowed icmp list everything all inaccessible

  Using a VPN, you can create a rule/filter and apply it to the tunnel which verifies the established bit to be set. Is it possible to do this with a list of access a PIX?

  I have a 6.3 (5) PIX 501

  If you add (in config mode)

  ICMP deny everything outside

  The above will disable any ping/trace route or network scans of the internet (that is, your network will be in stealth mode), if you also add

  access-list outside permit icmp any any echo response

  list a whole outside access allowed icmp time-exceeded

  access outside allowed icmp list everything all inaccessible

  outside access-group in external interface

  This will then allow icmp traffic going out to the internet, BUT don't be do not allow anyone to ping/trace route internet or analyze your network!

  You can test this by visiting http://www.grc.com and using the program "shields up" to analyze your network. Try first without icmp deny out of any instruction and then with the statement added to your configuration.

  Hope this helps

  Jay

• 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