Question of Access-list PIX

Similar Questions

• Question of access list for Cisco 1710 performing the 3DES VPN tunnel

  I have a question about the use of access lists in the configuration of a router Cisco 1710 that uses access lists to control traffic through the VPN tunnel.

  For example the following lines in a configuration on the remote router. My question is whether or not the traffic that matches the definition of list access-130 (something other than 192.168.100.0/24), cross the VPN tunnel or go directly to the Ethernet0 interface.

  My understanding is that traffic that matches the access list 120 would be encrypted and sent through the IPSec tunnel. If there was "ban" set out in the statements of 120 access-list, the traffic for those would be sent through the IPSec tunnel but not encrypted (if possible). And finally, given that the definition of crypto card reference only "adapt to 120", any traffic that matches 130 access list would be sent Ethernet0 but not associated with the card encryption and thus not sent through the IPSec tunnel. "

  Any input or assistance would be greatly appreciated.

  Map Test 11 ipsec-isakmp crypto

  ..

  match address 120

  Interface Ethernet0

  ..

  card crypto Test

  IP nat inside source overload map route sheep interface Ethernet0

  access-list 120 allow ip 192.168.100.0 0.0.0.255 10.10.0.0 0.0.255.255

  access-list 130 refuse ip 192.168.100.0 0.0.0.255 10.10.0.0 0.0.255.255

  access-list 130 allow ip 192.168.100.0 0.0.0.255 any

  sheep allowed 10 route map

  corresponds to the IP 130

  He would go through the interface e0 to the Internet in clear text without going above the tunnel

  Jean Marc

• Simple Question SSH Access-List

  I am allowing SSH access for all of our Cisco devices and you want to restrict access to all the following ip addresses: 192.168.200.1 - 192.168.200.50.  I forgot the exact configuration of access list to achieve this.  The subnet is 24 and I don't want the whole subnet - seulement.1-. 50.

  Thank you

  Thomas Reiling

  Hello

  If you use ssh, make sure that you have a domain name, host name and a rsa key is generated.  Assuing you have done this, the command vty ACL and following line will do the trick.  Note that the host 1-50 list is not on a subnet barrier.

  To get it exactly

  access-list 1 remark MANAGEMENT ALLOW
  access-list 1 permit 192.168.200.0 0.0.0.31

  access-list 1 permit 192.168.200.32 0.0.0.15

  access-list 1 permit 192.168.200.48 0.0.0.1

  host access-list 1 192.168.200.50

  access-list 1 refuse any newspaper

  It would be a good idea to put it on a limit, however, so the following would be much simpler and easier to read.

  access-list 1 remark MANAGEMENT ALLOW
  access-list 1 permit 192.168.200.0 0.0.0.63

  access-list 1 refuse any newspaper

  Apply the class of access on the vty lines and authentication, I would put something there too.

  line vty 0 4
  access-class 1
  entry ssh transport

  password Bonneau

  That should do it.

  Good luck!

  Brad

• 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.

• 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

• How PIX cross access lists?

  I'm new with PIX.

  I would like to know how this fw through access lists. I mean, it's in what order it checks the rules. I guess it can be quite an important issue if you want to keep performance with more than 400 rules and a flow of traffic.

  I thank the of for any comment.

  Hello

  the pix treats the ACL from top to bottom. Put the rules used most frequently at the top. After a match, the pix stop processing the ACL.

  Kind regards

  Tom

• 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.

• 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

• Cisco ASA tunnel access list question

  We have created a site to IPSec tunnel. Initially, only two IP address were allowed access to the tunnel.  They ask now addresses.  My question is, if I use access-list extended inside_access_in permit ip any host 10.60.55.10, I also have to make a statement of NAT that allows this?

  And when we change the VPN Site to Site connection profile, I have to allow all through this tunnel as well, correct?

  I thank you and I hope this makes sense.  We were originally political thought based routing on the nearest core of the source.

  Dwane

  Hi Sylvie,.

  If you use NAT so I say yes you must consider from... Normally, in a private LAN on L2L scenario, you might have used no. - NAT... If you have LAN identical at both ends, then you might have using a NAT to a diff of subnets at both ends... If you use the NAT public IP then it will be on the public IP based L2L address... So it depends on your current configuration.

  If you use one to 10.60.55.10 (then your site any subnet which flows through the VPN Firewall to 10.60.55.10 is allowed... here you may need to modify NAT as a source...)

  But the problem comes from the other end... for them the source will be 10.60.55.10 and destination would... then all traffic from host 10.60.55.10 is taken through the tunnel...

  So instead of making a statement as any visit its respective great nets 172.16.0/16 for example...

  Concerning

  Knockaert

• 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.

• ACCESS LIST QUESTIONS?

  I have a hand router Cisco 871 and 5 remote sites using the Cisco 850. The tunnel comes up fine and can ping back from the 850 to the 871. However, I think that I have a problem of access list because I can't open the main database which is on the main site of any of the 5 locations nor do I get on the internet that the proxy server get no not at other sites. I can ping these remote sites, but cannot use them in fact. These rules are very different, and then the PIX.

  192.168.1x

  * THE REMOTE SITE

  access-list 100 permit ip 192.168.1.0 0.0.0.255 192.168.0.0 0.0.0.255

  access-list 101 deny ip 192.168.1.0 0.0.0.255 192.168.0.0 0.0.0.255

  access-list 101 permit ip 192.168.1.0 0.0.0.255 any

  not run cdp

  sheep allowed 10 route map

  corresponds to the IP 101

  192.168.0.X

  HAND ROUTER

  recording of debug trap

  access-list 100 permit ip 192.168.0.0 0.0.0.255 192.168.1.0 0.0.0.255

  access-list 101 deny ip 192.168.0.0 0.0.0.255 192.168.1.0 0.0.0.255

  access-list 101 deny ip 192.168.0.0 0.0.0.255 192.168.6.0 0.0.0.255

  access-list 101 deny ip 192.168.0.0 0.0.0.255 192.168.7.0 0.0.0.255

  access-list 101 deny ip 192.168.0.0 0.0.0.255 192.168.5.0 0.0.0.255

  access-list 101 permit ip 192.168.0.0 0.0.0.255 any

  access-list 102 permit ip 192.168.0.0 0.0.0.255 192.168.6.0 0.0.0.255

  access-list 103 allow ip 192.168.0.0 0.0.0.255 192.168.7.0 0.0.0.255

  access-list 104. allow ip 192.168.0.0 0.0.0.255 192.168.5.0 0.0.0.255

  not run cdp

  sheep allowed 10 route map

  corresponds to the IP 101

  !

  IP tcp mss<68-10000>

  Hope this helps,

  Gilbert

• 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