Firewall router ios commands

Similar Questions

• Site to site VPN with router IOS

  I want to create a VPN site-to site on the Internet. On the remote site, aside from the VPN to the head office, there should be no traffic not allowed in internal from the Internet to the network and that there should be no traffic from the internal network to the Internet allowed. The internal network will run a private 192.168.x.x address range.

  I'm going to use a Cisco 2811 router integrated of services on the remote site and this will last an IPSec VPN that will end a hub at Headquarters. I understand that this router has an IOS and IPS firewall built in.

  Would I be right in thinking that because I don't want to have access to the Internet (except VPN) or should I configure IOS firewall features on the router? And there is no point in the configuration of the features IPS wouldn't?

  My thought is that only an entry in list of unique access to deny pi a whole applied inbound to the interface that connects to the Internet would be the best strategy. I think that the command "sysopt connection permit-ipsec" should allow the VPN to form even with the ip address to deny any any ACL (or is it just a Pix command? If Yes, then I have to allow ESP and UDP 500 (ISAKMP) from the public address of the hub at Headquarters to allow the VPN to form wouldn't I?).

  Think I'll probably expand slightly the access list to allow the icmp Protocol, ssh and https traffic from the IP address of firewall seat outside so that I can monitor the remote site and access it safely if the fail VPN.

  And I wouldn't need one access list on the interface connected to the internal network I would like because the range of addresses would be not routable, so they would not be able to initiate connections to the Internet (all the trffic to the remote site is specified under a valuable traffic to bring up the VPN)

  Use one of the IOS Firewall inspect commands or the IPS would be useless and have no effect in this case wouldn't it?

  I really just need to know if the ip address to deny any any ACL on the external interface on the remote site is the best solution (and the simplest), and whether it will be safe.

  We used to use fiewalls Pix for remote VPN site to site, Amazon refuse incoming connections on the external interface by default but now I have been informed that these series 2800 routers will be used later, so I would get my thoughts straight and be able to build safe to do the same work all existing PIX are doing (they are all installed for just the VPN at Headquarters as in) the first paragraph).

  I would like any advice or thoughts on the subject. I don't know there must be a ton of people who put routers for the same purpose.

  Thank you in advance.

  Pete.

  Pete

  I did a lot of implementations site VPN to another using IOS routers. They work very well. Based on my experience I offer these comments and I hope that they will help you:

  -you don't want a list of incoming access on the external interface, but you want more in it than simply refuse an ip. There is no permit-ipsec sysopt connection in IOS so you want to certainly allowed ISAKMP and IPSec/ESP. I suggest that you also want to allow SSH. I would like to allow ICMP but only starting from the address space of the network head end. I do not allow HTTPS since I generally do not allow the http server on the router. If you want HTTPS then certainly enable it. To facilitate the ping and traceroute on the remote I frequently allow icmp echo-reply, timeout and unreachable port from any source.

  -I want to put an inside interface access list. There are certain types of traffic that I don't want to send from the Remote LAN. I have usually refuse any trap SNMP or snmp for LAN devices and refuse out of the local network icmp redirects. I also often configure RPF controls inside interface to catch any device which is misconfigured.

  -If you want to allow SSH when the VPN is not active (and I highly recommend that you do) then you will probably need to configure at least 1 (and maybe more) users and password of the router ID. And you want to configure authentication on the vty use local authentication if the head end authentication server is not available.

  -I'm not clear from your description if you plan to run a dynamic routing via the VPN Protocol. I wish I had a dynamic routing protocol because I want to announce a default route to the remote control via the VPN. I do not locally configure a default route on the remote router. This way if the VPN tunnel is up there is a default route pointing to the tunnel and if the VPN tunnel is not up then there is no local route by default and users on the remote database can not access the Internet. It is a simple and very effective method to ensure that all user traffic must pass through the central site.

  -regarding the routes defined on the remote router, my approach is that I define a static route for the endpoint of the tunnel to allow the tunnel to implement and I set up static routes for the subnet to the head of line I can SSH. And I do not configure other static routes the on the remote router.

  -You probably want to disable cdp on the external interface and also to disable the proxy-arp (and I don't make any ip unreachable).

  -There is frequently a problem when using VPN site-to-site with fragmentation. If a device on the local network sends a frame of maximum size, and then the router needs to add additional headers for IPSec, then the frame is too large and requires fragmentation. I like to use tcp adjust-mss ip to control the chunk size for TCP traffic and avoid any problems with fragmentation.

  -I don't think you want to set up the firewall or IPS from the features of IOS on the 2811.

  I hope that your application is fine and that my suggestions could be useful.

  [edit] after posting my response, I read through your post again and realize that you make to a VPN concentrator. The approach I have proposed on the execution of a routing protocol works for me because I usually have a router IOS in mind. It would not work to connect to a hub.

  HTH

  Rick

• Termination of VPN on Pix behind router IOS with private subnet

  OK, basically, I wonder if it is possible to terminate a VPN connection on a Pix 506 Firewall which is behind a router IOS. The public interface of the Pix 506 have a private on a 29 ip address will IOS within the interface. Network is configured as follows:

  Internet as 10Base T

  | (5 public - X.X.X.34. 38)

  | (In WIC-1ENET)

  | (.34 assigned to interface)

  Cisco 1760

  | (Pomp) | (WIC-4PORTSWITCH)

  | | (10.0.0.1 29 on 1760)

  Net private Pix 506

  (192.168.1.0) (10.0.0.2 29 on Pix)

  Now, two internal interfaces of the 1760 are configured to PAT on the IP of the interface of the 1760 and all internet traffic goes perfectly. None of the access lists are currently applied anywhere on the 1760 and a static translation on the 1760 is configured pour.35 to 10.0.0.2 ('public' ip pix). RDP and other services authorized in the pix access list work perfectly well from the outside world when you enter a.35, but if I try to terminate a VPN from a pix 501 for the pix 506 offsite using the Intellectuelle.35 property, it does not work.

  Is it possible to do this type of work setting.

  I realize I could put an external switch to 1760 and run the public subnet directly and individually in the 1760 and Pix 506, however, I really would prefer not no need to do so if it is possible to avoid it.

  Remove the crypto map to the interface on the PIX and reapply.

• tunnel from site to site between router IOS and ASA

  I've combed through the configs on both sides of this tunnel 4 x now and the look of policies as they match. I applied the http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_configuration_example09186a0080094498.shtml note

  My crypto lsits access are good and my nat on the side of IOS are provided with a map of the route and look good. On the SAA traffic side on the side of the remote tunnel ASA is exempt from NAT. Each side already has a site to another tunnel configuration, so I added the appropriate lines to the existing cryptographic cards which include peers, transform set and match address 'access-list. The polcies crypto isakmp on both ends are compatible. I have attached some configs and debugs (from router IOS), but essentially the newspaper on the SAA starts with the phase 1 is complete and then routing not received notification message, no proposal chosen readings and then it goes to IKE lost the connection to a remote peer, connection, drop table correlator counterpart has failed, no match, the deletion and finally disconnected session reason lost service.

  Their other tunnel stay standing as well as the configuration of remote access vpn connection is good.

  I found a note that recommends checking any access security-list, so I removed the, but no luck, and a Cisco associated with a hub, but had a healthy logic

  Is displayed normally with the

  Cisco VPN 3000 correspondent

  message hub: no proposal

  Chosen (14). This is a result of the

  being host-to-host connections.

  The configuration of the router has the

  IPSec proposals ordered so that the

  proposal selected for the router

  with the access list, but not the

  peer. The access list has a larger

  network including the host that

  a cutting traffic.

  Make the router for this proposal

  hub to router connection

  first in line, so that it corresponds to the

  specific to the host first.

  but that didn't work either.

  Thank you

  Bill

  Bill,

  Take a look at this

  000610: * PCTime 10:42:15.094 Sep 27: ISAKMP: (2039): need XAUTH

  000611: * 10:42:15.094 PCTime sep 27: ISAKMP: node set 920927400 to CONF_XAUTH

  000612: * 27 sep 10:42:15.094 PCTime: ISAKMP/xauth: application XAUTH_USER_NAME_V2 attribute

  000613: * 27 sep 10:42:15.094 PCTime: ISAKMP/xauth: application XAUTH_USER_PASSWORD_V2 attribute

  000614: * 27 sep 10:42:15.094 PCTime: ISAKMP: (2039): launch peer 74.92.97.166 config. ID = 920927400

  000615: * 27 sep 10:42:15.094 PCTime: ISAKMP: (2039): lot of 74.92.97.166 sending peer_port my_port 4500 4500 (R) CONF_XAUTH

  -Other - 000616: * PCTime 10:42:15.094 Sep 27: ISAKMP: (2039): entry = IKE_MESG_INTERNAL, IKE_PHASE1_COMPLETE

  000617: * PCTime 10:42:15.094 Sep 27: ISAKMP: (2039): former State = new State IKE_P1_COMPLETE = IKE_XAUTH_REQ_SENT

  It should not go to extend the authentication. Since you have the client and the L2L on the same router and clients are configured for Extended authentication, the router will ask for XAUTH unless you configure the "No.-xauth" command after the pre-shared key

  Please implement the command:

  ISAKMP crypto keys in clear text address 74.92.97.166 No.-xauth

  Thank you

  Gilbert

• After the death of firewall router in an outtage power yesterday I replaced my router have restored internet access, but none of my corporate office offices can access our network printer/scanner.

  yerterday morning, that we had a power outage at my place of business. When power has been restored we can't access internet from any one of our desktop computers. After working with a material MFG co troubleshotter. our firewall router NETGEAR, it has been determined that the equipment was defective. They offered to replace the camera for only the shipping charges, I felt an acceptable solution. Then I was told that with bureaucracy, it would take two weeks to get the new unit. Well, my choice was then to set for two weeks and slowly go out of business or buying a new router. I have relpaced the unit with another mod. Netgear router and this quickly got back up again, at least if we could access our system of internal accounting and the internet. My problem is as it is now that I can't access our office network printer.scanner (kyoceraMita) of any one of my desktops. At this point, I'd appreciate any help. I own my business, but am not a computer guy of any measurment known to man. I have this idea, maybe it's a simple software for all fit everyone access to what they need, but I don't know what it is maybe. If sufficient information, in my view, that I could probably fix the problem myself without providing any benefits of outdoor programming.

  The problem now is that the router has changed, the addresses IP, subnet mask, default gateway address, network security wireless network wireless security password and other settings no longer correspond to the original router.  As you said that the SCP can all see each other, you need to see Kyocera and network user's guide 'unit' in order to find the IP address, subnet mask and other network setting the configuration parameters 'method '.

• When you try to add a network route with the "route add" command in the command line, I get the message "the requested operation requires a rise."

  Elevation required to route add command

  When you try to add a network route with the "route add" command in the command line, I get the message "the requested operation requires a rise."  What is the correct syntax to use?

  You can watch using the PowerShell...

  http://TechNet.Microsoft.com/en-us/library/bb978526.aspx

  http://TechNet.Microsoft.com/en-us/scriptcenter/dd742419.aspx

  .. .and post questions about Windows PowerShell forum...

  http://social.technet.Microsoft.com/forums/en/winserverpowershell/threads

• I try to add a route using the route add command, the command response is "the requested operation requires a rise."

  I'm traying to add a route using the route add command, the command response is "the requested operation requires a rise."

  Command: route add 10.1.1.0 mask 192.168.31.3 192.168.31.33

  Whay can I do, because I had tried in many cases

  original title: route command

  In response to a previous and similar thread...

  You can watch using the PowerShell...

  http://TechNet.Microsoft.com/en-us/library/bb978526.aspx

  http://TechNet.Microsoft.com/en-us/scriptcenter/dd742419.aspx

  .. .and post this question on the forum of Windows PowerShell...

  http://social.technet.Microsoft.com/forums/en/winserverpowershell/threads

• Automatic demotion of the Anyconnect Client (router IOS)

  Hello

  We run a Cisco Anyconnect client with a router IOS environment (2921) as the lead aircraft.

  We have upgraded the client package on the router to the latest version 3.1.13015. After installing this package on the customers, we discovered a bug. Windows-based computers are not able to establish a VPN connection more (authentication and auto-package-level still works, but then an error message is displayed ("unable to cannot" or similar).)

  I returned the package on the router back to an older version (3.1.11004), but is not beeing auto-installe when a client with the new version (buggy) connects.

  Is it possible to configure the router to force a downgrade to the customers, or is the only way to workaround to manually uninstall the package on clients?

  Thank you

  Heinz

  No you can't auto-downgrade the station clients.

  Unfortunately, you will need to uninstall it from the client end, then get the right package (older) of the router.

• 'Restart now' IOS command for 1310 Wireless Bridge

  I have 2 Setup bridges wireless Cisco Aironet 1310, the line-of-sight, 3/4 mile, one as Root as Non-Root.  Sometimes they drop their connection, but a hard reboot, one or two bridges will re-establish the connection.  What is the equivalent IOS command to the

  "GUI > system software > System Configuration > reboot now" command?  I would like to be able to telnet to the units and issue/script, the appropriate command.

  the command is "recharge".

  BRIDGE # reload

  Concerning

  Surendra

• Aironet 1242 IOS commands

  I'm trying to make airnoet 1242 access point model #AIR - LAP1242AG - A - K9 and I use the guide to

  http://www.Cisco.com/en/us/docs/wireless/access_point/12.3_7_JA/configuration/guide/s37frst.html

  The IOS version is 12.3 (11) JX1 but when I try the commands standard IOS (configure Terminal is not a valid command) I get an error 'order unreconized' I can not access the web GUI. I put the ip address and can ping but when I navigate to it I get nothing.

  I would be grateful for any help.

  You are not able to access the GUI, or enter the usual IOS commands because your AP running LWAPP software that is used when you want to use a wireless network centralized with controllers (WLC) wireless local area network.

  If you want to use this AP as a standalone access point, then you must download an IOS image on it.

  To achieve this (IMO), the simplest method is to follow the following steps:

  1. enable ios on the AP controls by running the command "debug lwapp console cli".

  2 - configure the IP address on the physical interface and make the point of access to a tftp server.

  3 - Place an IOS image on the tftp server

  4 - AP, type the command: "archive download-sw / overwrite/reload tftp: / // '.

  HTH,

  Tiago

  --

  If this helps you or answers to your question if it you please mark it as 'responded' or write it down, if other users can easily find it.

• ESXi and Vyatta as a firewall/router before

  Hello

  I'm looking for the solution network on ESXi with Vyatta as fron firewall/router configuration. Basically, I would like to define Vyatta, therefore all VPS traffic will go through it, so I could limit the bandwidth IPs ect null routed.

  Please note that I can't use NAT, I have public IP for access to the VPS. For now, I have two VLANs, please refer below because I'm not sure if it is actually possible with ESXi without any external hardware device.

  

  How many public IP addresses will be you?  To deal with the VMs you will configure the firewalls VM with a NETWORK adapter on the vSwitch with Internet connectivity, then a 2nd NETWORK card on a vSwitch "DMZ".  The vSwitch DMZ can be physical isolation (disconnected from any NETWORK adapter).  All traffic on the road to wil VMs through the firewall VM.

  The other question becomes how you access ESXi for management purposes.  Ideally, you do not directly connected to the Internet but place behind a firewall.  Ideally, it would be a separate device.   You could do it with a virtual machine, but you risk a complete access loss if the virtual machine is down.

  Dave

  VMware communities user moderator

  Now available - vSphere Quick Start Guide

  You have a system or a PCI with VMDirectPath?  Submit your specifications to Officieux VMDirectPath HCL.

• Traffic generated by router IOS inspect IPv6

  I try to configure the IPv6 packets on a router 2911 deep inspection (IOS 15.1 (2) T5) but I'm not able to inspect the traffic generated by router. It is not an option "ipv6 inspect name xxxx udp router-traffic' as in IPv4. So I am unable to ping to the router to a remote host.

  I could solve the problem of ping by simply adding a "permit any any icmp echo response" on my ACL, but I still can't access TCP or UDP based services (DNS, HTTP,...).

  Anyone knows if it is possible to activate the traffic generated by IPv6 router, or is there another solution for this problem? If so, how can I do that?

  Partial configuration:

  ipv6 unicast-routing
  
  ipv6 inspect name SPI_DIALER1_OUT tcpipv6 inspect name SPI_DIALER1_OUT udpipv6 inspect name SPI_DIALER1_OUT icmpipv6 inspect name SPI_DIALER1_OUT ftp

  interface Dialer1 ipv6 inspect SPI_DIALER1_OUT out ipv6 traffic-filter acl6_dialer1_in in

  ipv6 access-list acl6_dialer1_in sequence 10 permit icmp any any nd-ns sequence 20 permit icmp any any nd-na sequence 30 permit icmp any any router-advertisement sequence 40 permit icmp any any echo-reply deny ipv6 any any log

  Former Cisco's IOS 'inspect' system has indeed been deprecated.  You should use zone based firewall now.

  Here is the guide for the care of the IPv6 zone based firewall.

  http://www.Cisco.com/c/en/us/TD/docs/iOS-XML/iOS/sec_data_zbf/configuration/XE-3s/sec-data-ZBF-XE-book/sec-ZBF-IPv6.html

  If you want to go at a faster speed for the area based ipv4 firewall, try to use my Config Wizard and copy the bits you need.

  http://www.IFM.NET.nz/cookbooks/890-ISR-Wizard.html

• IPS/ACL/ZBF precedence on router IOS

  I have a number of 891 routers deployed for VPN connectivity to a central site. Routers have an ACL so focused on the area of firewall and IPS/IPS configured on their public interfaces. They run IOS universal 15.1.1. They have been for more than six months.

  Last week I started having newspapers like that of the instance of IPS:

  Jan 12 09:51:21 ss260 378: Jan 12 15:51:20.551: % 4-IPS-SIGNATURE: Sig:3041 Subsig:0 SEV:100 package of TCP SYN/DEF [Source that I can't identify me - MY-ROUTER:25-> IP - IP:25] VRF: NONE RiskRating:100

  I know that the ACL interface is processed before the ZBF. I was assuming that IPS happens after the ACL as well, but this package should never have gotten past my ACL. The ACL only allows ESP, IKE, SSH and pings and then only if they are from about a half dozen source IPs. The source of the trigger package is NOT among those permitted.

  Because my ACL does not all traffic not encrypted (with the exception of the pings I generate), I really didn't expect the instance of IPS to see whatever it is likely to trigger an alert, and until last week, it was true.

  So far, all the newspapers are for the same signature SYN/DEF. It is a type of special cases for some reason signature any or can I wait to see alerts whenever a packet that will block anyway, the ACL matches a signature?

  Hello

  First of all, I noticed that packages fell by IPS have the port source and destination 25 - weird ;-)

  If you are interested in the operation with new code CEF order you can check 'show cef interface INTERFACE_NAME IFC_NUMBER', it is reliable and in order, they are done, but perhaps more detail you need ;-)

  Router#sh cef interface fa0/0
  
  FastEthernet0/0 is down (if_number 4)
  
    Corresponding hwidb fast_if_number 4
  
    Corresponding hwidb firstsw->if_number 4
  
    Internet address is 10.1.1.1/24
  
    ICMP redirects are always sent
  
    Per packet load-sharing is disabled
  
    IP unicast RPF check is disabled
  
    Input features: Access List
  
    Output features: Firewall (NAT), Firewall (inspect)
  
    Inbound access list is 101
  
    Outbound access list is not set
  
    IP policy routing is disabled
  
    BGP based policy accounting on input is disabled
  
    BGP based policy accounting on output is disabled
  
    Hardware idb is FastEthernet0/0
  
    Fast switching type 1, interface type 18
  
    IP CEF switching enabled
  
    IP CEF switching turbo vector
  
    IP CEF turbo switching turbo vector
  
    IP prefix lookup IPv4 mtrie 8-8-8-8 optimized
  
    Input fast flags 0x1, Output fast flags 0x0
  
    ifindex 3(3)
  
    Slot  Slot unit 0 VC -1
  
    Transmit limit accumulator 0x0 (0x0)
  
    IP MTU 1500
  
  

  HTH,

  Marcin

• VPN Client TCP connection to router IOS

  Hello

  I try to get a VPN client to connect via TCP to a router. I currently have the router put in place (and work) in using a VPN - UDP. Unfortunately one of the sites I visit will not allow VPN traffic outside of their firewall. I have searched all over the site of Cisco and can't find any information on the IOS configuration to accept TCP - VPN connections. I would like to change the TCP port 80, so my VPN traffic looks like just standard internet browsing my client firewall. Any links/pointer would be greatly appreciated.

  Thanks in advance!

  -Joe

  Take a look at this:

  http://www.Cisco.com/en/us/docs/iOS/12_2t/12_2t8/feature/guide/ftunity.html#wp1310210

  http://www.Cisco.com/en/us/docs/iOS/12_2t/12_2t8/feature/guide/ftunity.html#wp1305478

  http://www.Cisco.com/en/us/docs/iOS/12_2t/12_2t8/feature/guide/ftunity.html#wp1315635

  Please rate if useful.

  Concerning

  Farrukh

• firewall router

  I don't know anything on the routers or firewalls except what they essentially. On my home system, I have 3 PC Windows XP and 2 sons printers connected by 2 Linksys routers to share internet access and printers (a router has also wireless iPod of my daughter). A friend 'helper' has helped me put in place several months ago and it worked fine. The second router has been added so that we can add this to the "network". It has worked well.

  But I replaced one of the PC and my 'friend' is not available to help me set it up again. I would like to ask for help on the configuration of the built-in firewall to one or two routers to allow me to access documents on a pc with this new pc.

  Caution - was a problem and now it is solved.

  Someone told me to go on the desktop pc and open My Documents > properties and then select the sharing tab. I had already done that and it has been verified in the two boxes in sharing network. He had me deselect the and click on apply, and then select both and click on apply.

  Cool - that fix! Now I can access My Documents on the desktop of the tablet pc.