Doubt of the ACL

Similar Questions

• How the ACL runs fragmented packets?

  Hello

  I'm looking for documentation on how the acl managing fragmented packets. Let's say I have the following in my access switch:

  class-map correspondence-everything MyACL1

  match the name of group-access MyACL1

  class-map correspondence-everything MyACL2

  match the name of group-access MyACL2

  class-map correspondence-everything MyACL3

  match the name of group-access MyACL3

  class-map correspondence-everything MyACL4

  match the name of group-access MyACL4

  class-map correspondence-everything MyACL5

  match the name of group-access MyACL5

  class-map correspondence-everything MyACL6

  match the name of group-access MyACL6

  In what order the fragmented incomming package will be checked by my class-card rules? It is sequential? I doubt it.

  Concerning

  He travels class-cards until there is a match, and it applies to this category

  regarding treatment ACL of fragments, see this page:

  http://www.Cisco.com/en/us/Tech/tk827/tk369/technologies_white_paper09186a00800949b8.shtml

  and this

  http://www.Cisco.com/en/us/docs/iOS/12_3t/12_3t8/feature/guide/gt_vfrag.html

• WLAN Access Denied for active MAC address in the ACL

  I have a pretty great list ACL (Access Control) and I've never had a problem with it in the past, but I just got a new laptop and same computer when I save the MAC address and reboot the router I always get the "WLAN Access Denied" error for access from your laptop.

  I did all the "sanity checks" to ensure that the password is correct and that other devices still work.

  I had the MAC address of the laptop the same way, I always have, I see the MAC address in the Logs in the access denied message and copy it from there, in the access list. I did it with more than 20 other devices successfully, I'm not sure what is different about this one MAC address... I confirm through ipconfig on the laptop that the MAC address I use is correct.

  When I turn off ACL, I can connect without any problem of the laptop.

  Any thoughts? I am very familiar with computers and you can do an advanced troubleshooting, I do not know infrastructure and networks of the stuff so I don't know where to start here.

  Any ideas on how I can fix this would be appreciated!

  You may have hit a limit of the ACL. A test, remove a device from your list and see if your laptop will connect. This would confirm if you have contributed the most to list ACL on the router...

• Configuration of the ACL to restrict access via SSH/Telnet

  You want to shoot a SSH/Telnet access to ISP address/IP of my switch interface.  Since the Dells have no strict vty/con interface to apply an ACL I guess I just have to match on an interface instead.  Using the ACL below.  Problem is that applying it kills telnet/ssh sessions completely and does them in.  Replaced the iPs in the wrong example with IPs.  Confirm that my public IP address is 112.94.236.58.  You will see a 112.94.236.56/29 with a permit instruction.

  TEST from the list of access permitted tcp 111.126.50.0 255.255.255.0 111.126.50.16 255.255.255.0 eq 22

  TEST from the list of access permitted tcp 111.126.50.0 255.255.255.0 111.126.50.16 255.255.255.0 eq telnet

  TEST tcp allowed access list 112.94.236.56 255.255.255.248 111.126.50.16 255.255.255.0 eq 22

  TEST the access permitted tcp 112.94.236.56 list 255.255.255.248 111.126.50.16 255.255.255.0 eq telnet

  TEST from the list of access permitted tcp 112.94.254.0 255.255.255.128 111.126.50.16 255.255.255.0 eq 22

  TEST from the list of access permitted tcp 112.94.254.0 255.255.255.128 111.126.50.16 255.255.255.0 eq telnet

  TEST the access permitted tcp 112.94.248.176 list 255.255.255.248 111.126.50.16 255.255.255.0 eq 22

  TEST the access permitted tcp 112.94.248.176 list 255.255.255.248 111.126.50.16 255.255.255.0 eq telnet

  access list tcp TEST refuse any 111.126.50.16 255.255.255.0 eq 22

  access list tcp TEST refuse any 111.126.50.16 255.255.255.0 eq telnet

  TEST the ip access list allow a whole

  111.126.50.16 is the switch

  Maybe I should use a destination host in the ACL instead?  (edit, nope, tried with a subnet of 255 s all, same problem)

  The ACL is created using the command access-list config mode.  On the interface it won't let me use ip access-class.

  Figured it out.  Kept, see references to "MACL", think why I needed a MAC access control list.

  Nope.

  Dell world, this means access control list management.

• doubt to the wi - fi connection

  Hello

  I have a doubt about the WiFi with a device.  I have this in my source code:

     String URL = urlupdate + ";interface=wifi";
                         conn = (HttpConnection)Connector.open(URL);
                         //
                        int rc = conn.getResponseCode();
                         if (rc != HttpConnection.HTTP_OK)
                             throw new IOException("Error response code: " + rc);
                         is = conn.openInputStream();
  

  and his works in my Simulator. But the doubt is when I use the phone, do I have to change the source code with all the settings?

  Thank you

  Assuming that the device has WiFi and it works, so this code should run as is, on the device.

• Need help of the ACL for SMTP

  All,

  First thanks for all assistance.

  I am trying to configure my ASA5505 to accept SMTP relay and the ACL\Static I have created does not work.

  Here is the config:

  ASA Version 8.2 (2)

  !

  names of

  !

  interface Vlan1

  nameif inside

  security-level 100

  IP 192.168.1.2 255.255.255.0

  !

  interface Vlan2

  nameif outside

  security-level 0

  IP 12.12.12.1 255.255.255.248--> deleted

  !

  interface Ethernet0/0

  switchport access vlan 2

  !

  interface Ethernet0/1

  !

  interface Ethernet0/2

  !

  interface Ethernet0/3

  Speed 100

  full duplex

  !

  interface Ethernet0/4

  !

  interface Ethernet0/5

  switchport access vlan 3

  !

  interface Ethernet0/6

  !

  interface Ethernet0/7

  !

  passive FTP mode

  permit same-security-traffic inter-interface

  permit same-security-traffic intra-interface

  access-list 101 extended permit tcp any host 12.12.12.1 eq smtp

  inside_access_in of access allowed any ip an extended list

  access-list sheep extended 10.10.10.0 any allowed ip 255.255.255.0

  pager lines 24

  Enable logging

  debug logging in buffered memory

  asdm of logging of information

  Within 1500 MTU

  Outside 1500 MTU

  MTU 1500 dmz

  ICMP unreachable rate-limit 1 burst-size 1

  don't allow no asdm history

  ARP timeout 14400

  Global 1 interface (outside)

  NAT (inside) 0 access-list sheep

  NAT (inside) 1 0.0.0.0 0.0.0.0

  public static tcp (indoor, outdoor) interface smtp 192.168.1.5 netmask 255.255.255.255 smtp

  inside_access_in access to the interface inside group

  Access-group outside_in in external interface

  Route outside 0.0.0.0 0.0.0.0 12.12.12.2 1

  Timeout xlate 03:00

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

  Sunrpc timeout 0:10:00 h323 0:05:00 h225 mgcp from 01:00 0:05:00 mgcp-pat 0:05:00

  Sip timeout 0:30:00 sip_media 0:02:00 prompt Protocol sip-0: 03:00 sip - disconnect 0:02:00

  Timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute

  timeout tcp-proxy-reassembly 0:01:00

  dynamic-access-policy-registration DfltAccessPolicy

  Enable http server

  No snmp server location

  No snmp Server contact

  Server enable SNMP traps snmp authentication linkup, linkdown cold start

  Telnet timeout 5

  SSH timeout 5

  Console timeout 0

  management-access inside

  dhcpd outside auto_config

  !

  a basic threat threat detection

  Statistics-list of access threat detection

  no statistical threat detection tcp-interception

  !

  class-map inspection_default

  match default-inspection-traffic

  !

  !

  type of policy-card inspect dns preset_dns_map

  parameters

  maximum message length automatic of customer

  message-length maximum 512

  World-Policy policy-map

  class inspection_default

  inspect the icmp

  class class by default

  !

  context of prompt hostname

  Please help me :-(

  Thank you very much!

  Hi Jim,.

  The configuration guide will provide a few basic examples for setting up groups of items:

  http://www.Cisco.com/en/us/docs/security/ASA/asa82/configuration/guide/objectgroups.html

  Single network objects are only available in 8.3 and higher. However, a group of objects to 8.2 can certainly contain a single member.

  -Mike

• need help to understand the ACLs and security levels

  I use static NAT (nat (inside, outside) static interface) between a single host inside for the DHCP address used on the external interface. The inside interface has the security level of 100, and the outside has the security level of 0. My understanding is that for connections with State, I wouldn't need the ACL. However, nothing works unless I set up an ACL (for example, right now I have a global allow rule). What Miss me?

  Even if you 'dormant', but you still have the access list applied on the interface which, by default, will have the "deny ip any any" implicitly at the end of the access eventhough list you have existing line "inactive".

  To remove access from the inside of the interface completely list, you must remove the following line:

  inside_access_out access to the interface inside group

• ASA 5520 8.0 (4) port depending on the ACLs vpn works not

  Hi all

  I have a problem with an ASA (5520 8.0 (4)) for lack of working with a port based acl for remote clients. I have a simple acl from a single line to split traffic, if I allowed the tunnel IP works fine, if I lock it up to TCP 3389 rdp will not work. I don't see anything in the logs and debug output, I did have a problem with a similar configuration (5510 8.0 (4) and I'm at a loss to explain it.)

  Everyone knows about this problem before? I have nat exclusions etc and as I said, the tunnel only works if the acl permits all IP traffic between client and server.

  THX in advance

  Split-tunnel list cannot IP, if you want to restrict which ports are are sent via the tunnel vpn for your clients vpn, you need to use VPN filters under Group Policy:

  http://www.Cisco.com/en/us/products/HW/vpndevc/ps2030/products_configuration_example09186a00808c9a87.shtml

• What is is it possible to use the acl extended for split tunneling on ASA?

  I'm setting up VPN IPSEC RA on SAA and I would like to know if it is possible to use the ACL extended as part of the split tunneling?

  Thank you!

  Yes, you can use the extended ACL. See this example:http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-nex...

  Kind regards

  Averroès.

• The ACL of the NAC GuestUser

  I installation of the NAC for role based on the user assignment of VLAN deployed as OOB VG L2. I have a default access, authentication and configuration of VLAN user. The user VLANis for comments. Thus, a guest opens it broswer and the customer is prompted to enter credentials. Credentials are accepted. The browser refreshes IP and I get a "... limited connectivity. 169.254.etc... ». I get this error when I apply ACL below the interface ' user vlan "(i.e. ip access-group 110 in), when the ACL is not assign everything works fine and the comments can roam my entire internal network. My DHCP/DNS is on the 10.0.0.0 network. Anyone have any ideas why I get this error?

  access-list 110 deny ip 192.168.41.0 0.0.0.255 10.0.0.0 0.255.255.255

  access-list 110 deny ip 192.168.41.0 0.0.0.255 172.16.0.0 0.15.255.255

  access-list 110 permit ip 192.168.41.0 0.0.0.255 192.168.41.0 0.0.0.255

  access-list 110 deny ip 192.168.41.0 0.0.0.255 192.168.0.0 0.0.255.255

  access-list 110 permit ip 192.168.41.0 0.0.0.255 any

  Hi there-

  What Vlan and the property is intellectual property the guest user when he experiences the web page contestant powers?

  What vlan and IP do you want comments to have once the client authenticates as a guest?

  My first thought is that your ACL denies requests DHCP and DNS request, since you mention the DHCP and DNS are on the 10.0.0.0/8 network.

  thxs

  Peter

• At the start of my Toshiba laptop Windows 7, my password is correct, no doubt, but the system says that it is not. Why?

  From my computer, my password is not correct no doubts, but the system said that it is not, ran maleware advast and no problem. Would it be a glich in the updates? Is this a battery problem? When it is plugged in, it works after the 5 or greater.

  See the guide to recovering lost password Windows 7 Home Premium account user, can't connect, connection problem

  Him begins the article with some basic steps you can take and then work upwards through more complicated methods where the easiest do not solve the problem. Please read the intro, but this looks like a corrupted user profile that needs fixing or replacement.

  Follow the precautionary measures later in the thread as well.

  You could be up & running again within an hour, probably less.

• Remove the ACL

  Hello

  I participate in an exercise of Packet Tracer.

  I have to remove a 110 ACL extended a router (R1):

  I type: R1 #(config) no access-list 110

  Now the network devices warks as I want, but the output of "R1 #show running-config' always to show me the 110 ACL extended. Why?

  Thank you

  I don't see the ACL in the configuration.

  You use access-list 101 only under int S0/0/0 you want to delete this?

  You can then tap

  conf t

  int s0/0/0

  no out ip-group 101 access

  end

  So in fact, the ACL is gone (or removed from the configuration), but orders referring to the ACL (ie. ip access-group under interface or under SNMP community ACL or ACL under VTY) is still intact. You must remove them manually.

• IOS - XE 4500: Crash on the ACL configuration

  Hi all

  We have recently migrated from stand-alone to VSS on our switches C4500 with Sup 7 - E.

  but the switch hangs at every time we edit or modify the ACL with the below error message:

  % SYS-3-BADBLOCK: bad block pointer

  % SYS-6-MTRACE: mallocfree: addr, pc

  % SYS-6-BLKINFO: corrupted next pointer blk

  % SYS-6-MEMDUMP: 0X7E043FF8

  We have noticed that there is a new bug for this issue is to say

  CSCun33897 Symptom: 
  A series switch Catalyst 4500 running IOS - XE may restart unexpectedly when the configuration of the ACL is applied to an interface.

  but there is no solution available yet.

  Please let me know if anyone had this kind of issue. Appreciate your suggestion and comments thereon.

  Used current Image: cat4500e-universalk9. Spa.03.05.00.E.152 - 1.E.bin.

  Thanks in advance.

  its seems to be closely related to the bug you mentioned

  If you download crashinfo I can look at it and try to confirm.

  Concerning

  Naveen

  rate if it's useful. *

• How is the ACL name of the router for fleeing?

  I want to test running and have a question, the name of the ACL.

  I configured the device blocking on the IDM,

  -blocking interface Fastethernet0/0 =

  -direction = in

  -Pre IDS_PRE = ACL name

  -Ask the IDS_POST = ACL name

  Change a signature "ICMP-echo" to shunhost and update on the router but added new ACL under Fastethernet0/0 as the name IDS_Fastethernet0/0_in_0 and rocking it with IDS_Fastethernet0/0_in_1.

  Q. why the ACL name not follow my name on the IDM?

  Thanks in advance.

  I think that there is some confusion about what are PreACl and PostACL.

  The PreACL and PostACl entries in IDM do not affect what's name created sensor ACL on the router.

  The sensor will always create an ACL that is named with the following format:

  IDS___<0or1>

  So for you the configuration it would create the following names of ACL:

  IDS_Fastethernet0/0_in_0 and IDS_Fastethernet0/0_in_1

  E he uses 2 ACL because it cannot modify an ACL that is currently applied on the interface. So if ACL 0 is currently applied then it will create 1 ACL and then apply ACLs one (which Désimpute ACL 0).

  The sensor can then remove 0 and create a new ACL 0 when a change has to happen.

  So, what are the pre and Post ACL names used for?

  One of the biggest complaints we had with older versions of the probe was that the user could add no lines to the ACL that created the sensor.

  So we came to the top with the pre and Post ACL so that users can add entries to the ACL that creates the sensor.

  The user must connect on the router itself and create an ACL with little matter the name they want. Inside of the ACL, they put the entries they finally want to see at the top of the ACL that will create the sensor.

  When they set up the sensor, they take the name of the ACL, they created and enter it in the field for the name of PreACL.

  The user can do the same for the entries they want at the bottom of the ACL generated by the sensor by creating another ACL on the router. Put it in the Scriptures they want to see at the bottom of the created sensor ACL and then type the name in the name of PostACL field.

  If the names of pre and Post ACL aren't going to use to name the ACL created sensor.

  But on the contrary these ACL is read out of the router by the sensor, and these ACL entries will be placed inside the ACL, created by the sensor.

• Does not work from inside the DMZ after configuring the ACL.

  Hello

  According to the concept of ASA, trafuc of the Interior (100 s) DMZ (50 Sec) is allowed by default. When I try to write an acl (host to host block) on the Interface inside, no other traffic runs to and from the Interface on the inside.

  Everything is blocked. Previously no ACL has been mapped to the inside Interface.

  Kindly help me to solve this problem and also provide the document concerning the behavior of the firewall before and after configuring the ACL.

  Poster of the acl that you entered. Remember, there is an explicit deny a whole at the end of the acl. So if you want only to prevent access to a dmz machine, then it must be written correctly. Leave what you want enable dmz, deny the rest of the demilitarized zone, and then leave all the rest.