IPSec Transport Mode question

Similar Questions

• IPSEC in Transport mode: what don't understand me?

  Hello world

  Please, consider the following example:

  R1-F1/0(12.12.12.1)---(12.12.12.2) R2 f1/0

  R1 has loopback1: 1.1.1.1, R2 has loopback:2.2.2.2

  Interesting traffic is between 1.1.1.1 and 2.2.2.2. We must use ipsec in transport mode. But for some reason, no matter how many times I typed transport mode under ipsec encryption, traffic get transferred via IPSEC tunnel in tunnel mode.

  R1 config:

  crypto ISAKMP policy 10
  BA aes 256
  preshared authentication
  Group 2
  address key crypto isakmp 12.12.12.1 CISCO

  Crypto ipsec transform-set ESP-AES-192-SHA-384-esp - aes 192 esp-sha-hmac
  transport mode

  ZEE 10 ipsec-isakmp crypto map
  defined by peer 12.12.12.1
  transformation-ESP-AES-192-SHA-384 game
  match address ZEE

  interface FastEthernet1/0
  IP 12.12.12.2 255.255.255.0
  automatic duplex
  automatic speed
  card crypto ZEE

  Route IP 1.1.1.1 255.255.255.255 12.12.12.1

  ZEE extended IP access list
  permit ip host 2.2.2.2 1.1.1.1

  R2 config

  crypto ISAKMP policy 10
  BA aes 256
  preshared authentication
  Group 2
  address key crypto isakmp 12.12.12.1 CISCO
  !
  !
  Crypto ipsec transform-set ESP-AES-192-SHA-384-esp - aes 192 esp-sha-hmac
  transport mode

  ZEE 10 ipsec-isakmp crypto map
  defined by peer 12.12.12.1
  transformation-ESP-AES-192-SHA-384 game
  match address ZEE

  interface FastEthernet1/0
  IP 12.12.12.2 255.255.255.0
  automatic duplex
  automatic speed
  card crypto ZEE

  Route IP 1.1.1.1 255.255.255.255 12.12.12.1

  ZEE extended IP access list
  permit ip host 2.2.2.2 1.1.1.1

  #########################

  Then I delete the SA on R1/R2:

  R2 #clear crypto isa
  R2 #clear isakmp crypto
  R2 #show crypto isakmp his
  status of DST CBC State conn-id slot
  12.12.12.1 12.12.12.2 MM_NO_STATE 1 0 ACTIVE (deleted)

  R2 #show crypto ipsec his

  Interface: FastEthernet1/0
  Tag crypto map: ZEE, local addr 12.12.12.2

  protégé of the vrf: (none)
  local ident (addr, mask, prot, port): (2.2.2.2/255.255.255.255/0/0)
  Remote ident (addr, mask, prot, port): (1.1.1.1/255.255.255.255/0/0)
  current_peer 12.12.12.1 port 500

  Truncated!

  local crypto endpt. : 12.12.12.2, remote Start crypto. : 12.12.12.1
  Path mtu 1500, mtu 1500 ip, ip mtu IDB FastEthernet1/0
  current outbound SPI: 0x0 (0)

  SAS of the esp on arrival:

  the arrival ah sas:

  SAS of the CFP on arrival:

  outgoing esp sas:

  outgoing ah sas:

  outgoing CFP sas:

  R1 #show crypto isakmp his
  status of DST CBC State conn-id slot

  R1 ipsec crypto #show her

  Interface: FastEthernet1/0
  Tag crypto map: ZEE, local addr 12.12.12.1

  protégé of the vrf: (none)
  local ident (addr, mask, prot, port): (1.1.1.1/255.255.255.255/0/0)
  Remote ident (addr, mask, prot, port): (2.2.2.2/255.255.255.255/0/0)
  current_peer 12.12.12.2 port 500

  Truncated!

  local crypto endpt. : 12.12.12.1, remote Start crypto. : 12.12.12.2
  Path mtu 1500, mtu 1500 ip, ip mtu IDB FastEthernet1/0
  current outbound SPI: 0x0 (0)

  SAS of the esp on arrival:

  the arrival ah sas:

  SAS of the CFP on arrival:

  outgoing esp sas:

  outgoing ah sas:

  outgoing CFP sas:

  ###############

  Then, I have ping to 1.1.1. source 2.2.2.2 on R2:

  capture23.PNG

  

  Above, we see the traffic between 1.1.1.1/2.2.2.2 is sent in tunnel mode, even though I configured IPSEC transport mode.

  It seems that it does not matter if we have configured ipsec for the mode of transport or not, when using the crypto traffic map is transmitted using tunnel mode.

  Thoughts?

  Thank you

  You cannot use the mode of transport in this situation. You need two-heads IP here: one for end tp (1.1.1.1 to 2.2.2.2) communication and one for transport of IPsec (12.12.12.1 to 12.12.12.2). This is the reason that your router automatically in tunnel mode.

• GET VPN tunnel mode and transport mode multicast

  Hello

  I really don't understand why GET VPN uses a tunnel for packets in multicast mode:

  Examples of a @multicast = 239.0.0.37:

  (1) here a package to GET VPN: | 239.0.0.37 | ESP | 239.0.0.37 | transport layer. Payload: : This way, he uses (two IP headers) IPSec tunnel mode.

  (2) here a package that I imagine to be better: | 239.0.0.37 | ESP | transport layer. Payload: : Mode of transport IPsec, 1 registered IP header = fewer bytes used.

  In both cases, the IP header cannot be secured, cause GET VPN Tunnel using the same multicast IP header (this is why it works so well...)

  I don't understand why Cisco uses model IPsec in tunnel mode to encapsulate packets instead of the mode of transport. I can't find a descent of answer to this question... Maybe my question is not relevant?

  Thanks for your replies.

  Concerning

  Stone,

  I quote DIG it

  It is worth noting that tunnel header preservation seems very similar to IPsec transport mode.
  However, the underlying IPsec mode of operation with GET VPN is IPsec tunnel mode. While
  IPsec transport mode reuses the original IP header and therefore adds less overhead to an IP
  packet (5% for IMIX packets; 1% for 1400-byte packets), IPsec transport mode suffers from
  fragmentation and reassembly limitations when used together with Tunnel Header Preservation
  and must not be used in GET VPN deployments where encrypted or clear packets might require
  fragmentation.
  

  In practice, reassambly concerns and initially odd behaviors with some encryption engines caused the recommendation to be tunnel mode.

  That being said, for large packages (where fresh important generals) overhead costs are minimal. For small packages (voice), the overhead is large, but the packet (after encapsulation) size should not be a problem.

  M.

• transport mode, AH in IPSec AH tunnel mode

  Hello world.

  I read about Ipsec that contains two main protocols among others: AH and ESP.

  For now, I'm focused on AH only. I read the theory on AH and two modes AH may work: mode and tunnel Transport mode.

  (201.201.201.1) h1 - R1 (199.199.199.1) s0 - s0 (199.199.199.2) R2 - H2 (200.200.200.2)

  I would like to implement the following:

  Whenever R1 receives the ip packet to the H1 to H2, R1 must use AH in transport mode before it sends the packet to R2, in the same way, R2 must use AH in transport of packets sent by H2 H1, before mailing in R1.

  I just need an example on how we can configure R1 and R2 to accomplish the task above...

  Thanks for your help and have a great day.

  .

  Hi Sara,.

  Please find the example configuration for the GRE IPsec VPN using the mode of transport.

  (201.201.201.1) h1 - R1 (199.199.199.1) s0 - s0 (199.199.199.2) R2 - H2 (200.200.200.2)

  You can use the ACL to restrict to only the ports required for the vpn as udp 500, ah, gre and 4500 and you can check. I hope this helps.

  Also, you can find the site mentioned described to better understand the differences between the modes of transport or tunnel.

  R1:

  ===

  version 12.4

  !

  hostname R1

  !

  IP cef

  !

  !

  crypto ISAKMP policy 10

  preshared authentication

  address key crypto isakmp 199.199.199.2 CISCO

  !

  Crypto ipsec transform-set esp-3des esp-sha-hmac MyTransSet

  transport mode

  !

  Profile of crypto ipsec MyProfile

  game of transformation-MyTransSet

  !

  interface Tunnel0

  IP 10.10.10.1 255.255.255.252

  tunnel source 199.199.199.1

  tunnel destination 199.199.199.2

  ipv4 ipsec tunnel mode

  Profile of tunnel MyProfile ipsec protection

  !

  interface serial0

  199.199.199.1 IP address 255.255.255.0

  automatic duplex

  automatic speed

  !

  IP route 0.0.0.0 0.0.0.0 199.199.199.2

  !

  Line con 0

  line to 0

  line vty 0 4

  !

  !

  end

  ======================================================================

  R2

  =====

  version 12.4

  !

  hostname R2

  !

  !

  !

  IP cef

  !

  !

  crypto ISAKMP policy 10

  preshared authentication

  address key crypto isakmp 199.199.199.1 CISCO

  !

  !

  Crypto ipsec transform-set esp-3des esp-sha-hmac MyTransSet

  transport mode

  !

  Profile of crypto ipsec MyProfile

  game of transformation-MyTransSet

  !

  interface Tunnel0

  10.10.10.2 IP address 255.255.255.252

  tunnel source 199.199.199.2

  199.199.199.1 tunnel destination

  ipv4 ipsec tunnel mode

  Profile of tunnel MyProfile ipsec protection

  !

  interface serial0

  IP 199.199.199.2 255.255.255.0

  automatic duplex

  automatic speed

  !

  IP route 0.0.0.0 0.0.0.0 199.199.199.1

  !

  !

  Line con 0

  line to 0

  line vty 0 4

  !

  !

  end

  Please assess whether the information provided is useful.

  By

  Knockaert

• VTI and NAT IPsec Tunnel mode

  Hello world

  I don't know that this subject has been beaten to death already on these forums.  Nevertheless, I have yet to find the exact solution, I need.  I have three machines, two routers and an ASA.  One of the routers sits behind the ASA and I have a GRE VTI configuration between two routers with ASA NATting, one of the routers to a public IP address.  I can guarantee the tunnel mode IPsec transport, but as soon as I pass in tunnel mode, the communication fails even if the SA is established.

  Please see the configuration below and tell me what I am missing please.  I changed the IP addresses for security.

  The following configuration works when transform-set is set to the mode of transport

  Note: The Router 2 is sitting behind the ASA and is coordinated to the public IP 200.1.1.2

  Router 1:

  Crypto ipsec transform-set SEC esp - aes 256 esp-md5-hmac

  tunnel mode

  !

  Crypto ipsec IPSEC profile

  transformation-SEC game

  !

  !

  interface tunnels2

  IP 172.16.1.1 255.255.255.252

  tunnel source 200.1.1.1

  tunnel destination 200.1.1.2

  Ipsec IPSEC protection tunnel profile

  !

  SECURITYKEY address 200.1.1.2 isakmp encryption key

  !

  crypto ISAKMP policy 1

  BA aes 256

  md5 hash

  preshared authentication

  Group 2

  ASA:

  public static 200.1.1.2 (indoor, outdoor) 10.1.1.1 netmask 255.255.255.255

  Router 2:

  interface Tunnel121

  address 172.16.1.2 IP 255.255.255.252

  IP nat inside

  IP virtual-reassembly

  tunnel source 10.1.1.1

  tunnel destination 200.1.1.1

  Ipsec IPSEC protection tunnel profile

  !

  Crypto ipsec transform-set SEC esp - aes 256 esp-md5-hmac

  tunnel mode

  !

  Crypto ipsec IPSEC profile

  transformation-SEC game

  !

  SECURITYKEY address 200.1.1.1 isakmp encryption key

  !

  crypto ISAKMP policy 2

  BA aes 256

  md5 hash

  preshared authentication

  Group 2

  There is no access-lists on the SAA except to allow a whole ICMP

  I am very grateful for any guidance you can provide in advance guys.

  Hello

  MTU, and the overhead was in this case.

  You changed encapsulating ipv4 instead of LIKING - which have less overhead (no GRE inside). This is why it started working.

  If you want to continue using GRE you decrease the MTU as described.

  ---

  Michal

• Integration and Radian mode Question on HP 50 g calculator

  It seems every time I change radian to degrees and OK mode mode, it will be always a few minutes later. I don't know if I accidentally activated a flag to cause it to happen or not, but how can I keep the calculator in degree mode always?

  I have a question about integration on the HP 50 g as well. Here is a picture of what I seek to accomplish on the HP 50g: http://i.imgur.com/qTt9kHp.png

  I'll tie it also via this post.

  My problem is this: I need to take the integral on x while having a 'B' variable in the integral so. I want my final answer to appear as 1 333 + 0.333 B as does in the attached picture and the link above. But every time I entered the variables and constants and take the integral, I get the following error message:

  Error: Name not set

  What exactly what I need to change in order to calculate the integral?

  Hi VitaX,

  You want to integrate it in exact mode to get the desired response.  To switch between exact and about modes, hit shift to the right (hold) and enter.  The equal sign upward into the annunciator area of the screen indicates the exact mode.  Punching in your problem, I had (B + 4000) / 3, which is the exact shape of 1 333 +. 333 B.

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  Best regards, Hal

• Satellite M70-144: standby mode question

  Hi all just bought an M70 and upgraded to WIN XP PRO ED.

  And now I have two questions that I can't find a solution.

  1. when I shut down my computer, I get a message saying.
  And ask me if I want to stop it.
  ----
  WMS TS NOTIFY WINDOW 000006 has...
  ----
  If I Don t closed manually down it not shut down the computer.

  WMS is something to do with Windows media player 10, which is installed with the computer?
  Any solution?

  2 when the computer falls down pending / sleep mode, and I want to use it again after a while, the screen remains black and the only way to get on again is to press and hold the power button and turn it off.
  Yesterday the powerbutton light was red.

  Any solution on this?

  I now set the time forever for the wait / "sleep" mode so it will not happen again.

  Hello

  1.) sometimes the Windows OS peut t close because some different background processes are running and won t stop automatically. Most 3rd party applications or / and bad registry entries are responsible for these issues.

  2.) are you sure that the laptop don t goes into sleep mode? If the laptop is in sleep mode so usually it of necessary to use the power button.

• SRX5308 IPsec Config Mode - [IKE] ERROR: no configuration is found for...

  I have a real simple setup for Client-to-gateway VPN installation. Base tunnels seem to work fine, but when I try to install

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  The local IP address at the end of check-in Mode Config is 192.168.1.0. The manual says to leave the field empty and it will default to the address of the gateway, which is 192.168.1.1. If I leave the field blank this wrong address gets automatically enrolled and if I try to manually enter the right one I get an error saying it's an invaild address?

  

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  I think that is the question. How to work around this problem or do it properly? The manual is not any help and I googled my old brian dead.

  Thanks for any idea that you can give me!

  CC

  Thanks for the reply okadis and thanks for the link to this site, it is very useful!

  I was able to find a solution. Turns out that the works of very good firewall configuration. All I had to do was use the remote configuration of the CLIENT as the LAN address 192.168.1.0, and then everything worked.

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  Maybe I'm missing something here, but it works perfectly after using what is there in the end customer.

  Should have been simple. Well...

  CC

• Mobile HP 8570w workstation: HP 8570w, Windows 10 Ent, sleep mode question

  Hello

  I have just upgraded to Windows Enterprise 10 with clean install.  I used to use Softpaq Download manager patch my drivers on previous versions of Windows, but now I see only the subset of drivers for Windows 10. I tried to research forum if someone had questions as I have but has not been able to find.

  This is when I press Fn + F3, 8570w actually turns off without going into standby mode, so I can quickly return to work when I need.

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  Thank you

  D

  and this has solved the problem with sleep:

  http://h20564.www2.HP.com/hpsc/SWD/public/detail?swItemId=ob_151366_1&swEnvOid=4192

  HP does a bad job, keep the driver for some models to update pages...

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  Hello

  The question you posted would be better suited in the TechNet Forums; We recommend that you post your question in the TechNet Forums to get help:

  http://social.technet.Microsoft.com/forums/en-us/w7itprovirt/threads

  Keep us updated on the status of the issue.

• Cisco ASA Site to Site VPN IPSEC and NAT question

  Hi people,

  I have a question about the two Site to Site VPN IPSEC and NAT. basically what I want to achieve is to do the following:

  ASA2 is at HQ and ASA1 is a remote site. I have no problem setting a static static is a Site to IPSEC VPN between sites. Guests residing in 10.1.0.0/16 are able to communicate with hosts in 192.168.1.0/24, but what I want is to configure the NAT with IPSEC VPN for this host to 10.1.0.0/16 will communicate with hosts in 192.168.1.0/24 with translated addresses

  Just an example:

  N2 host (10.1.0.1/16) contacted N1 192.168.1.5 with destination host say 10.23.1.5 No 192.168.1.5 (notice the last byte is the same in the present case,.5)

  The translation still for the rest of the communication (host pings ip destination host 10.23.1.6 N3 N2 not 192.168.1.6 new last byte is the same)

  It sounds a bit confusing to me, but I've seen this type of configuration before when I worked for the supplier of managed services where we have given our customers (Ipsec Site to Site VPN with NAT, don't know how it was setup)

  Basically we contact the customer via site-to-site VPN hosts but their real address were hidden and we used as translated address more high 10.23.1.0/24 instead of (real) 192.168.1.0/24, last byte must be the same.

  Grateful if someone can shed some light on this subject.

  Hello

  OK so went with the old format of NAT configuration

  It seems to me that you could do the following:

  • Configure the ASA1 with static NAT strategy
    • access-list L2LVPN-POLICYNAT allowed ip 192.168.1.0 255.255.255.0 10.1.0.0 255.255.0.0
    • public static 10.23.1.0 (inside, outside) access-list L2LVPN-POLICYNAT
  • Because the above is a static NAT of the policy, this means that the translation will be made only when the destination network is 10.1.0.0/16
  • If you have for example a PAT basic configuration to inside-> external traffic, the above NAT configuration and the custom of the actual configuration of PAT interfere with eachother
  • ASA2 side, you can normally configure NAT0 / NAT Exemption for the 10.1.0.0/16 network
    • Note of the INTERIOR-SHEEP access-list SHEEP L2LVPN
    • the permitted INSIDE SHEEP 10.1.0.0 ip access list 255.255.0.0 10.23.1.0 255.255.255.0
    • NAT (inside) 0-list of access to the INTERIOR-SHEEP
  • You will need to consider that your access-list defining the VPN encrypted L2L traffic must reflect the new NAT network
    • ASA1: allowed to access-list L2LVPN-ENCRYPTIONDOMAIN ip 10.23.1.0 255.255.255.0 10.1.0.0 255.255.0.0
    • ASA2: list L2LVPN-ENCRYPTIONDOMAIN allowed ip 10.1.0.0 access 255.255.0.0 10.23.1.0 255.255.255.0

  I could test this configuration to work tomorrow but I would like to know if it works.

  Please rate if this was helpful

  -Jouni

• Try to import tables datapump file that makes use of the transportable mode

  
  

  
  

  Hi using impdp on oracle 11.2.0.3 and have a dumpfile that contains export of tables which makes use of the transportable tablespace mode.

  
  

  
  

  To import 3 of the cobncerned file just form tables in another database using DME, but does not

  
  

  Error
  

  ORA-39002: invalid operation

  ORA-39061: import conflicts FULL mode with the TRANSPORTABLE export mode

  
  

  {code}
  

  UserID = archive / MDbip25

  DIRECTORY = TERMSPRD_EXTRACTS

  DUMPFILE = archiveexppre.964.dmp

  LOGFILE = por_200813.log

  PARALLEL = 16

  TABLES = ZPX_RTRN_CDN_STG_BAK, ZPX_RTRN_STG_BAK, ZPX_STRN_STG_BAK

  REMAP_TABLESPACE = BI_ARCHIVE_DATA:BI_ARCHIVE_LARGE_DATA

  REMAP_TABLESPACE = BI_ARCHIVE_IDX:BI_ARCHIVE_LARGE_IDX

  {code}

  All ideas

  A transportable export must be imported using an import of transportable.  Complete using = is not a valid option.  You might be able to pass in an expression to include for the tables that you want to, but the work must always be transportable.  Your import command should look like:

  Impdp directory of the user/password transport_datafiles=/path1/pathx/dir1/dir5/filename.dbf dpump_dir dumpfile = your_dumpfile.dmp = include = table: 'In ('a', 'b', 'c') '.

  I see you are using the api, but this would be the type of command line to import.

  I hope this helps.

  Dean

• Sleep on Satellite L300D Mode question

  Hello

  When in standby or hibernation, your laptop regularly tries to get out of that State of its own volition, makes a sound and displays the login box. Attempted to address to reinstall Windows Vista Home Basic Edition since the disks from the factory and have also disconnected from the mouse.

  Any ideas what this could be?

  Hi Pedro

  Sorry, but I don't understand the problem. How do you spend your laptop computer to enter standby or hibernation mode? You use the FN key combination or you just close the cover of the display?

  Is - this laptop to wake up or what?

• SP4600: DOS Mode: Question about audio driver

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  I am running the latest driver on the support Web site, but it doesn't seem to make noise when you play an old DOS mode game I like...

  Thank you!

  Hello

  Unfortunately there is no information about it. The driver on the download from Toshiba site is designed for this model of laptop, and it has been tested with operating system running.

  Have no solution to your problem, but you can check on the net if you can find a compatible driver. Your camera has card his Yamaha YMF743.

  Good luck!

• Z10 blackBerry 10 landscape mode question

  Hello

  I noticed that whenever I open BBM and tilt the phone to landscape mode while in a chat window, it does not do and remains in portrait mode. If I go to the HUB and open a previous cat then tilt the phone, it activates the landscape mode. All the world is facing this?

  Thank you

  Mustafa

  This is currently the way it works. Landscape works of the hub. I hope that in the future, we'll get more support landscape.