Issue on IPSEC

Is it true that ipsec use a RSA algorithm when using the pre-shared key?

i read that IKE phase one for IPSEC uses the asymetric cryptography and the second uses the symetric one.

both may be the case, but as a general rule, it is not correct.

should i understand that with pre-shared key there is no asymetric cryptography in IKE phase 1?

Yes and no... ;-)

You always with Diffie-Hellman key agreement, which is also an asymmetric mechanism. Which takes place in PSK and digital certificates (rsa - sig).

For authentication - and this is probably what you are referring - with PSK there is no public key operation but a couple of hash-operations. If you are authenticating with digital certificates, you have a lot of public key operations where digital signatures are calculated and also checked.

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Tags: Cisco Security

Similar Questions

To confirm the network is GRE over IPSEC

Hello world

We have Cisco 4500 device GRE tunnel and next hop is that ASA makes the IPSEC VPN over WAN.

If this type of network is called free WILL on the right of IPSEC?

Also when I do on 4500 sh int tu0

reliability 255/255, txload 79/255, rxload 121/255

5 minute input rate 2228000 bps, 790 packets/s

5 minute output rate 780000 bps, 351 packets/s

Need to understand which shows that data transmitted by tunnel LIKING which is not encrypted right?

To verify ipsec ASA which is encrypted data that we do sh right its isakmp crypto?

When we apply crypto map on the physical interface ASA here?

Thank you

Mahesh

If your GRE tunnel protection applied to this topic, so I think that the transmitted data is encrypted. GRE over ipsec simply means the application of the protection of tunnel to tunnel will otherwise it's just a simple GRE tunnel.

Side that Show crypto isakmp his, you can also check if the traffic from one site to another is using GRE or not by issuing crypto ipsec to show its, it will tell you the number of Protocol and it should say 47. And if you use the protection tunnel command to set the ipsec tunnel, you will not need to define cryptographic cards more.

IPSec on VMWare ESX 5.1 communication problems

Hello
We have 2 computer systems. You running us VMWare ESX 5.1 and the other is running Ubuntu 14.04. We have problems for IPSec to work between the two systems. We cannot find any documentation or known issues with IPsec on VMWare ESX 5.1, so we're going to reach out to the community.
Here's what we did:
1. we configured Ubuntu and VMWare systems to use IPv6, we can ping each other using IPv6.
2. we configure IPSec on an Ubuntu operating system by following the instructions below:
https://help.Ubuntu.com/community/IPSecHowTo
3. we have followed the instructions below to configure IPsec on VMWare.
http://KB.VMware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 1021769
Here's the problem:
When 2 Ubuntu systems run IPsec, they are able to ping each other. However, when allow us IPSec communications between VMWare and Ubuntu, the ping is suspended.
Here is the result of the configuration of command esxcli on VMWare:
UBUNTU. IPv6.ADDRESS-> Ubuntu IPv6 address
VMWARE. IPv6.ADDRESS-> address IPv6 from VMWARE

Name Source address Destination address State SPI Mode Encryption Algorithm, integrity algorithm to life
-------- ------------------------------------- ------------------------------------- ------ ----- --------- -------------------- ------------------- --------
GoToDPSA UBUNTU. IPv6.ADDRESS VMWARE. Mature IPv6.ADDRESS infinity 0 256 transport 3des-cbc hmac-sha2-256 x
VMWARE DPToGoSA. IPv6.ADDRESS UBUNTU. Mature IPv6.ADDRESS infinity 0 x 300 transport 3des-cbc hmac-sha2-256
Name of the Source address Source Port Destination address Destination Port Protocol flow Action Mode SA
-------- ---------------------------------------- ----------- ---------------------------------------- ---------------- -------- ---- ------ --------- --------
VMWARE DPToGoSP. IPv6.ADDRESS/64 0 UBUNTU. IPv6.ADDRESS/64 0 everything on transport ipsec DPToGoSA
GoToDPSP UBUNTU. IPv6.ADDRESS/64 0 VMWARE. IPv6.ADDRESS/64 0 in ipsec transport GoToDPSA
Here's what we found:
After debugging the problem (using tcpdump), we found that the VMWare system sends the ESP packets, but never sends a package AH (required for IPSec authentication). Even when the encryption protocol is null, the system of VMWare would always send ESP packets, but never once sent a package of AH.
Here is the resulting execution trace: Ubuntu - ping-> VMWare:
...
IP6 UBUNTU. IPv6.ADDRESS > VMWARE. IPv6.ADDRESS: AH(spi = 0 x 00000256, seq = 0 x 16): ICMP6, an echo request, seq 1, length 64
IP6 VMWARE. IPv6.ADDRESS > UBUNTU. IPv6.ADDRESS: ESP(spi = 0 x 00000300, seq = 0 x 1), length 160
IP6 UBUNTU. IPv6.ADDRESS > VMWARE. IPv6.ADDRESS: AH(spi = 0 x 00000256, seq = 0 x 17): ICMP6, an echo request, seq 2, length 64
IP6 VMWARE. IPv6.ADDRESS > UBUNTU. IPv6.ADDRESS: ESP(spi = 0 x 00000300, seq = 0 x 2), length 160
IP6 UBUNTU. IPv6.ADDRESS > VMWARE. IPv6.ADDRESS: AH(spi = 0 x 00000256, seq = 0 x 18): ICMP6, an echo request, seq 3, length 64
IP6 VMWARE. IPv6.ADDRESS > UBUNTU. IPv6.ADDRESS: ESP(spi = 0 x 00000300, seq = 0 x 3), length 160
Summary:
There seems to be a problem with IPSec in VMWare ESX 5.1 on IPv6.
We noticed that the downloads section of the site support provided patches for VMWare ESx 4.x and earlier, but lack of patches for VMWare ESx 5.x.
Are there known issues in this area or available patches to fix this problem? Your kind suggestions would be greatly appreciated. Thank you.

Sorry for the late reply, but here the analysis of what is happening and why you are experiencing a problem.

The Encapsulating Security Payload (ESP) to IPsec protocol will encrypt a payload of the packet and can

Optionally authenticate the packages as well. You do not include orders allowing you to set the

Security Association (SA) and political security (PS), but the output in your post indicates that you

you want to encrypt the payloads both authenticate packets in mode of transport between the hosts.

I don't know why the Ubuntu IPsec HowTo examples using protocols AH and ESP to encrypt and

authenticate the packets. In our view, it is best done in a single step with ESP, ESXi only

offer the option of AH with IPsec. Of course, this requires configuring the ESXi server and your

The host with a configuration of IPsec compatible Ubuntu (or any other operating system).

To illustrate, suppose the ESXi server has the address 2001:db8:1 and the host of Ubuntu has the

address 2001:db8:2. We will use cbc-3des for encryption of the useful and hmac-sha2-256 load for integrity

authentication mode of transport - just like in your message.

On the ESXi host, the commands to do this might look like this (of course, you need to generate your)

own keys and not re-use those I did).

# Add the outbound security association ESXi

esxcli ipsec ip network his Add.

-sa-source = 2001:db8:1.

-sa-destination = 2001:db8:2.

-sa-mode = transport.

-sa-spi = 0 x 200.

-encryption = 3des-cbc algorithm-

-encryption key = 0x6dd50fa97e919365d393fd0d404c655f80651316e9418682.

-the integrity algorithm hmac-sha2-256 =.

-integrity key = 0x730047c680d9812535a741bbb3521a29322cca77464cf16092519c4165ca6958.

-sa-name = sa_1to2

# Add the ESXi inbound security association

esxcli ipsec ip network his Add.

-sa-source = 2001:db8:2.

-sa-destination = 2001:db8:1.

-sa-mode = transport.

-sa-spi = 0 x 300.

-encryption = 3des-cbc algorithm-

-encryption key = 0x50988e55ca6a0d0440cf0c29f80d308df884616ec4b55552.

-the integrity algorithm hmac-sha2-256 =.

-integrity key = 0xf76caa5b4985a8a9d1c7cedbcf43f21b83401818e3b8d5e526a8c99ff4d4baa7.

-sa-name = sa_2to1

# Add the outbound security policy ESXi

esxcli network ip ipsec Ms Add.

-sp-source = 2001:db8:1 / 64.

-source-port = 0.

-sp-destination = 2001:db8:2 / 64.

-destination-port = 0.

-top-layer-protocol = any.

-action = ipsec.

-output = flow direction.

sp-= transport mode.

-sa-name = sa_1to2.

-sp - name = sp_1to2

# Add the ESXi incoming security policy

esxcli network ip ipsec Ms Add.

-sp-source = 2001:db8:2 / 64.

-source-port = 0.

-sp-destination = 2001:db8:1 / 64.

-destination-port = 0.

-top-layer-protocol = any.

-action = ipsec.

-direction of flow = in.

sp-= transport mode.

-sa-name = sa_2to1.

-sp - name = sp_2to1

# List the ESXi security associations

esxcli network ip ipsec its list

Name Source address Destination address State SPI Mode Encryption Algorithm, integrity algorithm to life

------- -------------- ------------------- ------ ----- --------- -------------------- ------------------- --------

sa_2to1 2001:db8:2 infinite mature 2001:db8:1 of hmac-sha2-256 0 x 300 transport 3des-cbc

sa_1to2 2001:db8:1 infinite mature 2001:db8:2 of hmac-sha2-256 0 x 200 transport 3des-cbc

# List the ESXi security policies

List of the sp network ip ipsec esxcli

Name of the Source address Source Port Destination address Destination Port Protocol flow Action Mode SA

------- -------------- ----------- ------------------- ---------------- -------- ---- ------ --------- -------

sp_1to2 2001:db8:1 / 64 0 2001:db8:2 / 64 0 everything on ipsec transport sa_1to2

sp_2to1 2001:db8:2 / 64 0 2001:db8:1 / 64 0 in ipsec transport sa_2to1

On your Ubuntu host, you need a compatible IPsec configuration. In general, on linux systems

use the command setkey BSD-door, this is done by changing the system-wide

in/etc/ipsec configuration file - tools.conf.

#! / usr/sbin/setkey - f

flush;

spdflush;

#

# SAs ESP using 192 bit long keys (168 + 24 parity)

# generated using: dd if account = / dev/random = 24 bs = 1 | xxd - ps

# ESXi supports 3des-cbc, aes128-cbc, or null

#

# AH SAs using 256 bit long keys

# generated using: dd if account = / dev/random = 32 = 1 bs | xxd - ps

# ESXi supports hmac-sha1 or hmac-sha2-256

#

Add 2001:db8:1 2001:db8:2 esp 0x200

E 3des-cbc 0x6dd50fa97e919365d393fd0d404c655f80651316e9418682

-A hmac-sha256 0x730047c680d9812535a741bbb3521a29322cca77464cf16092519c4165ca6958;

Add 2001:db8:2 2001:db8:1 esp 0 x 300

E 3des-cbc 0x50988e55ca6a0d0440cf0c29f80d308df884616ec4b55552

-A hmac-sha256 0xf76caa5b4985a8a9d1c7cedbcf43f21b83401818e3b8d5e526a8c99ff4d4baa7;

# Security policies

spdadd 2001:db8:1 2001:db8:2 all Pei in ipsec

ESP/transport / / need;

spdadd 2001:db8:2 2001:db8:1 all Pei on ipsec

ESP/transport / / need;

I have no problem of encryption and authentication of IPv6 traffic between a server ESXi 5.1

and a host of 14.10 Ubuntu using this configuration.

Geez, Fusion 5.0 looks like it is not ready for prime time!

I rely on the merger to run my Sunos 10.5, 10.6, Windows 7, oS Linux RHE.   I don't have not upgraded to ML yet due to some issues with IPSEC VPN. It seems now 5 Fusion does not work with Lion 10.7.4 and that's the least of his problems. It is such a disaster that brought me from Parallels to VMWARE in 3.0, despite the fact that it turns out that they charge $50 every year or so for upgrades and I two MBP to upgrade.
Interesting that this upgrade is timed with a deal to get the latest Parallels for $39, if you have VMware. I used a trial version and imported a Solaris 10.5 UNIX, WIndows 7 and 10.4 Fedora Linux VM and works very well. What the hell happened to FUsion?   Is this the type of press
We can expect on the hypervisor pro? Should I look for to start recommending open source hypervisor (which we all know well)?
From the personal and professional point of view, I have some real serious concerns here. I have a lot of clients running the VMWARE hypervisor for virtualization on Wall Street. I think it just barely live Q / a. Looks like I really need start looking for ZEN. Irony is that the C-level execs seem like when a product is 'legitimated' by price, releases, etc. (so of Fedora and RHE, at the time not taken seriously until)
RHE came out for $3,000... then it's OK).
Looks like it's back to Parallels. + 2 parallels.   I can't take a chance of installing junk that don't work.

V10.7.4 OS X has some issues with usb3 devices stability, as it seems. I saw it myself, and it has lot of problems mentioned by people on different forums. Mountain Lion seems to have a more stable usb3 pilot, even if there are still some problems. I have to admit that I see many problems with usb3 and stability in general (meaning: also on Windows 7). Maybe that usb3 for OS X and Windows 7 drivers may need time to mature. I hope it is different with Linux and Windows 8. Maybe it's the cause of your problems, but I'm not sure about this.

Anyway, you mention that the external hard drive uses its own encryption and merge sort is not able to use the virtual disk to the virtual machine. You are able to use this external drive like any other drive in OS X? As creating folders, copying documents from the drive, removal of files, etc.. It worked with Fusion 4.1.3 on the same machine? How did you upgrade? Did you stop all the vm before the upgrade or you did suspend?

Just for my own information: are you currently testdriving VMware Fusion 5?

Edit: I was reading the notes version and found some thing usb3 in the known "problems":
- Unable to start a VM from USB 3.0 on MacBook Air 5.1 devices
  You may not be able to start a virtual machine from the devices USB 3.0 on MacBook Air 5.1.
  When you attach a USB 3.0 device, you see the error messageThe device 'XXX' was unable to connect to its ideal host controller. An attempt will be made to connect this device to the available host controller. This might result in undefined behavior for this device.
  
  You can ignore the error message and the installation of the OS on the USB device. However, after restarting the virtual machine, the USB 3.0 device does not appear in the Start Menu.
  
  Solution: Use a USB 2.0 as a replacement device.
This sounds a bit like the problem you are experiencing. I wonder if it isn't just a problem of usb3 with all new MBA 2012 and MBP models (including the retina MBP). Maybe someone else can shed some light on this.

Post edited by: treee. Usb3 added info to release notes

2801 1700 IPSEC VPN ISSUES

Current set up is static static.

due to changes in the ISP we lose static electricity on the 1700. If I configure dynamic DNS behind the 1700s could I use a FULL domain name in isakmp crypo policy?

(i.e.) ISAKMP crypto key address

and then in the map

Card <#>ipsec-isakmp crypto

defined by peers

transform-Set

the 1700 is an ISDN connection

alternative is ranging from T1 to 2 X the cost and buy a plane ticket and a WIC...

Yes you can, you can use the different sequence for both cryptographic cards numbers. Place the first static then the dynamic.

Concerning

Farrukh

IPSEC Idle timeout issues

Hi all

I am trying to diagnose a problem with IPSEC, that I can't understand. I have a tunnel that is constantly giving up connection, run a debugging I see this message as the reason for the passing tunnel:

Group = 1.1.1.1, IP = 1.1.1.1, Connection completed for peer 1.1.1.1. Reason: Remote Proxy 10.20.0.0 Timeout, Proxy Local 10.10.252.0 Idle IPSec Security Association

Group = 1.1.1.1, Username = 1.1.1.1, IP = 1.1.1.1, disconnected Session. Session type: IPSecLAN2LAN, duration: 1: 00: 02:00, xmt bytes: 2300, RRs bytes: 0, right: Idle Timeout

Now, I think that it is basically because there is no interesting traffic (correct me if im wrong).

However, I am a bit confused because after reading this document:

http://www.Cisco.com/en/us/docs/iOS-XML/iOS/sec_conn_dplane/configuration/15-1s/sec-IPSec-idle-TMRS.html

It is said...

"If the IPsec SA slow timers are not configured, only the global lifetimes of IPsec security associations are applied. SAs remained until the expiring global timers, regardless of activity by peers. »

It seems that the idle timer would only be if he specifically configured, if not then it will be just to wait use the world clock but the global timer should not tear connection but just re-new keys.

I try to find the reason why the tunnel is down, but how can he be inactivity timer sa - if it is not configured?

Any help on that would be great.

Thank you

I guess that it is an ASA. Try something like:

attributes of Group Policy DfltGrpPolicy
VPN-idle-timeout 1440

For a 24-hour timeout.

PIX IPSec and ACL issues

Hello

On a PIX 515E v.6.3.5.

There are three lists ACL that can come into play when setting up an IPSec VPN on a PIX? (I hear a sound of 'It depends')

1 Nat (0) ACL - NOT NAT traffic, it is part of the IPSec VPN

2 crypto ACL - ACL that distinguishes if the traffic is destined for the IPSec tunnel.

3 ACL - ACL to allow | deny traffic after ACL #1 and #2.

#3 "Allow packet IPSec to bypass the blocking of access list" If the "ipsec sysopt connection permit" command is configured and ONLY for the #3 ACL? In other words the sysopt does not participate on ACL #1 or 2 above?

The mirroring of the ACL, which is suggested (required) to both sides of the tunnel IPSec applies to what ACL?

Thank you

Dan
```
pdvcisco wrote:
Hello,
On a PIX 515E v.6.3.5.
Are there three ACL lists that can come in to play when configuring an IPSec VPN on a PIX? (I hear a roar of "It depends" )
1. Nat (0) ACL  - to NOT nat traffic this is part of the IPSec VPN
2. Crypto ACL - ACL that distinguishes if the traffic is destined for the IPSec tunnel.
3. ACL - ACL to permit | deny traffic after ACL #1 and #2.
Does #3 "enable IPSec packets to bypass access list blocking" if the "sysopt connection permit-ipsec" command is configured, and ONLY on ACL #3? In other words the sysopt doesn't participate on ACL #1 or 2 listed above?
The mirroring of ACL's, that is suggested (required) for both sides of the IPSec tunnel applies to which ACL?
Thanks,
Dan
```
Dan

It depends on

(1) is not always used, because with a site to site VPN sometimes you need to NAT your addressing internal

(2) always necessary

(3) if the "ipsec sysopt connection permit" is set up any ACLs on the interface where the VPN is finished is bypassed. If it is not enabled then once packets are decrypted they are then checked against the acl.

Mirrored ACLs is required.

Jon

IPSEC VPN tunnel on issue of Zonebased Firewall

Help, please!

I'm trying to configure a router lab ISR1921 to build the VPN tunnel with vmware vshield edge. The configuration of the 1921 is pasted below. There is not a lot of adjustment on the side of vshield really and I'm sure both sides are adapting to phase 1 & 2.

The question I have: the tunnel can be built correctly and I also see from show crypto ipsec release encap and decap counters. However the devices on each side can communicate. That said, I can ping from 1921 to the IP of the internal interface of the vshield with IP source specified. But just no communication part and other...

I did debugs and only "error" messages are:

01:58:03.193 20 February: ISAKMP: (1001): error suppression node 1656104565 FALSE reason 'informational (in) State d1.

...

01:58:03.193 20 February: ISAKMP: (1001): purge the node-1657220080

I hope that I did a stupid thing to configure error, but I spent too much time on it. It is supposed to be a really simple installation... Please help!

!

version 15.4

horodateurs service debug datetime msec

Log service timestamps datetime msec

no password encryption service

!

Lab-1900 host name

!

boot-start-marker

boot system flash: c1900-universalk9-mz. Spa. 154 - 1.T1.bin

boot system flash: c1900-universalk9-mz. Spa. 151 - 4.M7.bin

boot system flash: c1900-universalk9-mz. Spa. 150 - 1.M4.bin

boot-end-marker

!

AAA new-model

!

AAA authentication login default local

authorization AAA console

AAA authorization exec default local

!

AAA - the id of the joint session

clock timezone AST - 4 0

clock to summer time recurring ADT 3 Sun Mar 2 Sun Nov 02:00 02:00

!

DHCP excluded-address IP 192.168.100.1 192.168.100.40

!

dhcp DHCPPOOL IP pool

import all

network 192.168.100.0 255.255.255.0

LAB domain name

DNS 8.8.8.8 Server 4.2.2.2

default router 192.168.100.1

4 rental

!

Laboratory of IP domain name

8.8.8.8 IP name-server

IP-server names 4.2.2.2

inspect the IP log drop-pkt

IP cef

No ipv6 cef

!

type of parameter-card inspect global

Select a dropped packet newspapers

Max-incomplete 18000 low

20000 high Max-incomplete

Authenticated MultiLink bundle-name Panel

!

redundancy

!

property intellectual ssh version 2

!

type of class-card inspect entire game ESP_CMAP

match the name of group-access ESP_ACL

type of class-card inspect the correspondence SDM_GRE_CMAP

match the name of group-access GRE_ACL

type of class-card inspect entire game PAC-cls-icmp-access

match icmp Protocol

tcp protocol match

udp Protocol game

type of class-card inspect correspondence sdm-cls-VPNOutsideToInside-13

game group-access 154

class-card type check ALLOW-VPN-TRAFFIC-OUT match-all

match the ALLOW-VPN-TRAFFIC-OUT access group name

type of class-card inspect entire game PAC-cls-insp-traffic

match Protocol pptp

dns protocol game

ftp protocol game

https protocol game

match icmp Protocol

match the imap Protocol

pop3 Protocol game

netshow Protocol game

Protocol shell game

match Protocol realmedia

match rtsp Protocol

smtp Protocol game

sql-net Protocol game

streamworks Protocol game

tftp Protocol game

vdolive Protocol game

tcp protocol match

udp Protocol game

http protocol game

type of class-card inspect entire game AH_CMAP

match the name of group-access AH_ACL

inspect the class-map match ALLOW VPN TRAFFIC type

match the ALLOW-VPN-TRAFFIC-OUT access group name

type of class-card inspect correspondence ccp-invalid-src

game group-access 126

type of class-card inspect entire game PAC-insp-traffic

corresponds to the class-map PAC-cls-insp-traffic

type of class-card inspect entire game SDM_VPN_TRAFFIC

match Protocol isakmp

match Protocol ipsec-msft

corresponds to the AH_CMAP class-map

corresponds to the ESP_CMAP class-map

type of class-card inspect correspondence ccp-icmp-access

corresponds to the class-ccp-cls-icmp-access card

type of class-card inspect the correspondence SDM_VPN_PT

game group-access 137

corresponds to the SDM_VPN_TRAFFIC class-map

!

type of policy-card inspect self-out-pmap

class type inspect PCB-icmp-access

inspect

class class by default

Pass

policy-card type check out-self-pmap

class type inspect SDM_VPN_PT

Pass

class class by default

Drop newspaper

policy-card type check out-pmap

class type inspect PCB-invalid-src

Drop newspaper

class type inspect ALLOW VPN TRAFFIC OUT

inspect

class type inspect PCB-insp-traffic

inspect

class class by default

Drop newspaper

policy-card type check out in pmap

class type inspect sdm-cls-VPNOutsideToInside-13

inspect

class class by default

Drop newspaper

!

security of the area outside the area

safety zone-to-zone

safety zone-pair zp-self-out source destination outside zone auto

type of service-strategy inspect self-out-pmap

safety zone-pair zp-out-to source out-area destination in the area

type of service-strategy check out in pmap

safety zone-pair zp-in-out source in the area of destination outside the area

type of service-strategy inspect outside-pmap

source of zp-out-auto security area outside zone destination auto pair

type of service-strategy check out-self-pmap

!

crypto ISAKMP policy 1

BA 3des

preshared authentication

Group 2

ISAKMP crypto key iL9rY483fF address 172.24.92.103

!

Crypto ipsec transform-set esp-SHA-ESP-3DES-3des esp-sha-hmac

tunnel mode

!

IPSEC_MAP 1 ipsec-isakmp crypto map

Tunnel Sandbox2 description

defined by peer 172.24.92.103

Set security-association second life 28800

game of transformation-ESP-3DES-SHA

PFS group2 Set

match address 150

!

the Embedded-Service-Engine0/0 interface

no ip address

Shutdown

!

interface GigabitEthernet0/0

WAN description

IP 172.24.92.18 255.255.255.0

NAT outside IP

No virtual-reassembly in ip

outside the area of security of Member's area

automatic duplex

automatic speed

No mop enabled

card crypto IPSEC_MAP

Crypto ipsec df - bit clear

!

interface GigabitEthernet0/1

LAN description

IP 192.168.100.1 address 255.255.255.0

IP nat inside

IP virtual-reassembly in

Security members in the box area

automatic duplex

automatic speed

!

IP forward-Protocol ND

!

IP http server

access-class 2 IP http

local IP http authentication

IP http secure server

!

IP nat inside source map route RMAP_4_PAT interface GigabitEthernet0/0 overload

IP route 0.0.0.0 0.0.0.0 172.24.92.254

!

AH_ACL extended IP access list

allow a whole ahp

ALLOW-VPN-TRAFFIC-OUT extended IP access list

IP 192.168.100.0 allow 0.0.0.255 192.168.1.0 0.0.0.255

ESP_ACL extended IP access list

allow an esp

TELNET_ACL extended IP access list

permit tcp any any eq telnet

!

allowed RMAP_4_PAT 1 route map

corresponds to the IP 108

!

1snmp2use RO SNMP-server community

access-list 108 deny ip 192.168.100.0 0.0.0.255 192.168.1.0 0.0.0.255

access-list 108 allow ip 192.168.100.0 0.0.0.255 any

access-list 126 allow the ip 255.255.255.255 host everything

access-list 126 allow ip 127.0.0.0 0.255.255.255 everything

access-list 137 allow ip 172.24.92.0 0.0.0.255 any

access-list 150 permit ip 192.168.100.0 0.0.0.255 192.168.1.0 0.0.0.255

access-list 154 allow ip 192.168.1.0 0.0.0.255 192.168.100.0 0.0.0.255

!

control plan

!

Line con 0

exec-timeout 0 0

Synchronous recording

line to 0

line 2

no activation-character

No exec

preferred no transport

transport output pad rlogin lapb - your MOP v120 udptn ssh telnet

StopBits 1

line vty 0 4

access-class TELNET_ACL in

exec-timeout 0 0

Synchronous recording

transport of entry all

line vty 5 15

access-class TELNET_ACL in

exec-timeout 0 0

Synchronous recording

transport of entry all

!

Scheduler allocate 20000 1000

0.ca.pool.ntp.org server NTP prefer

1.ca.pool.ntp.org NTP server

!

end

NAT looks fine.

Please create an ACL with bidirecctional ACEs and add it as a group of access to the interface of penetration:

IP access-list extended 180

IP 192.168.100.0 allow 0.0.0.255 192.168.1.0 0.0.0.255 connect

ip permit 192.168.1.0 0.0.0.255 192.168.100.0 0.0.0.255 connect

allow an ip

interface GigabitEthernet0/1

IP access-group 180 to

IP access-group out 180

Generer generate traffic, then run the command display 180 access lists .

Also, if possible activate debug ip icmp at the same time.

Share the results.

Thank you

Site to Site VPN IPsec IPv6 on issue of routers-Tunnel

Hi, I am experiencing a problem can any one address the question below and let me know the solution. I have two routers and try to build "Site to Site VPN IPsec IPv6". I followed orders from Cisco and community document but when I apply my profile of ipsec for tunnel interfaces, that the tunnel is down.

https://supportforums.Cisco.com/docs/doc-27009

Ali,

VTI tunnels are meant to be broken when there is no active negotiated spinnakers.

The tunnel will go towards up/face upwards when there is a means of transport of packages - i.e. the SPIs are present.

You can control the order spinnakers 'show peer's crypto ipsec '.

For debugging:

Debug crypto isa

Debug crypto ipsec

M.

VPN IPSec L2L between IOS and PIX 6.3 - MTU issue?

The side of the remote control (customer) is behind the 6.3 (5) PIX. And the side of the head end (server) is 2911 IOS on 15.0.

The IPSec tunnel rises very well and passes traffic. However, there is a server which are not fully accessible. Note, it is mainly the web traffic.

Client initiates a connection to the http://server:8000. They receive a redirect to go to http://server:8000 / somepage.jspa. Package caps show the customer acknowledges the redirect with a SYN - ACK response, but then the connection just hangs. And no other packets are received in return. I noticed that the redirected page is a .jsp and other pages that work OK are not. I also noticed that some MTU and TCP MSS configurations on the side of the head that are in place for another GRE VPN tunnel with another site. So I got in the way of the fragmentation of packets. The side PIX has all the standard configurations of IPSec as well as default MTU on the interface of the inside and outside.

When the MTU is set manually on the client computer to 1400, the access to the works of http://server:8000 / somepage.jspa very well. So I need to tweak the settings of PIX. I tried to adjust the MTU size on and abroad the interface as well as the parameter "sysopt connection tcp - mss. I don't know what else to do here.

Here is a summary of the MTU settings on the head of line:

End of the head:

int tunnel0 (it's the GRE tunnel)

IP mtu 1420

source of tunnel G0/0

dest X.X.X.X

tunnel path-mtu-discovery

card crypto vpn 1

tunnel GRE Description

blah blah blah

card crypto vpn 2

Description IPSec tunnel

blah blah blah

int g0/0 (external interface)

no ip redirection

no ip unreachable

no ip proxy-arp

Check IP unicast reverse

NAT outside IP

IP virtual-reassembly

vpn crypto card

int g0/1 (this is the interface to the server in question)

no ip redirection

no ip unreachable

no ip proxy-arp

IP nat inside

IP virtual-reassembly

IP tcp adjust-mss 1452

HA, sorry my bad. Read the previous post wrong.

(Note: Yes, the SMS on the tunnel interface should be 40 bytes less than MTU).

Do not twist the MTU, not for TCP problems (not as the first step), it is safer to play with the MSS. MTU may depend on other things (OSPF for example).

Make a sweep of a ping with DF bit set with the size (from 1300 bytes for example). By doing this, you want to check what is the maximum size of the package, which you can test through the IPsec tunnel. Once you have this value consider - subtract 40 and this defined as value MSS of the LAN interface (and adjust the value of PIX if you can).

M.

In Ipsec Dial-up DNS issue

Hello

I have configured the IPsec VPN connection on my ASA, I intrnaet Web site, which is registered in public, I have internal DNS XXXX XXXX. My ASA 7.2 is worm (4) and the split tunneling is enabled

the problem is when my dial-up users use dongle to connect to the VPN, they are connected and are part of the network but accesstihs thet INTERANET WEBSITE (e.g. www.intranet,.com) if it goes ad resolves DNS on the INTERNET, but it does not resolve the DNS on my local DNS servers and I want that they resolve DNS on my Local DNS servers.

I have ability to remove SPLIT TUNNEL but I dnt want to do that, can someone please help me

You can as many you want to just add one after the other separated by spaces

Sent by Cisco Support technique iPhone App

Termination of IPSEC Services and anonymous logon

Ending IPSEC Services

, I receive the following event in the log to start. I also have a message of success for a logon by ANONYMOUS. I realize that this account peut be an issue of access network system using the (intentionally by MS?) Scary ID of ANONYMOUS but I am concerned about the fact that it could be something nasty.

Details

Product: Windows Operating System

ID: 7023

Source: Service Control Manager

Version: 5.2

Symbolic name: EVENT_SERVICE_EXIT_FAILED

Message: The %1 service is stopped with the following error:

%2

Explanation

The specified service has stopped unexpectedly with the error specified in the message. The service closed safely.

User action

To fix the error:

Check the error information displayed in the message.

To view error WIN32_EXIT_CODE SCM met, at the command prompt, type

SC query service name

The displayed information can help you troubleshoot the possible causes of the error.

I tried every combo of syntax, that I can think of, but I can't this query to run.

I got up and down from behind firewall router firewall protection more live Superantispyware more live Winpatrol and regularly scan with Malwarebytes and Microsoft Security Essentials. Secunia PSI keep an eye on the status of my programs. In this case, I ran additional full scans with all that I have more than 3 online scanners known. All say CLEAN but I still get these messages. BTW account 'Guest' is disabled.

Any help please?

Hello

Have you made changes on the computer before this problem?

The following articles could be useful.
IPSec tools and settings
http://TechNet.Microsoft.com/en-us/library/cc738298%28WS.10%29.aspx
IPSec troubleshooting tools
http://TechNet.Microsoft.com/en-us/library/cc784300%28WS.10%29.aspx

Event log issues...

So im going through my event log to try to understand a blue screen I got recently, and I had a few questions about things I stumbled on in the case log...

The first is what is IPSec and the IKE and AuthIP entered services modules strategy service agent?

and on the other hand...

"Security," it lists these "Audit success".

In detail, it lists the user as "N/A"? Should I be worried?

Hello

Strategy IPSec IKE and AuthIP are all connected and used for internet security and computer security peer and authentication.

The IKEEXT service hosts the Internet Key Exchange (IKE) and Authenticated Internet Protocol () AuthIP modules overlay. These input modules are used for authentication and key exchange in Internet Protocol security (IPsec). Stopping or disabling the IKEEXT service will disable IKE and AuthIP key with peer computers Exchange. IPsec is typically configured to use IKE and AuthIP; Therefore, stopping or disabling the IKEEXT service might cause IPsec to fail and compromise the security of the system. It is strongly recommended that you have the IKEEXT service operation.

Internet Protocol security (IPsec) supports to the peer network level authentication, data origin authentication, data integrity, confidentiality (encryption) data and anti-replay protection. This service apply IPsec policies created through the IP Security Policies snap-in or the command line tool "netsh ipsec '. If you stop this service, you may experience network connectivity issues if your policy requires that connections use IPsec. In addition, remote management of the firewall Windows is not available when the service is stopped.

These two paragraphs were taken from descriptions of services of each of them.

The system of audits to ensure that they work very well.

You have run scans with your anti-virus or MSE?

I hope this helps.

Jim

How to circumvent the "Assistant" secpol.msc and configure State IPsec (esp, spi, enc, auth-trunc) and political (src, dst, in, on, fwd) directly as in the ip-xfrm Linux command?

Right off the bat, the wizard tells me that I can't use a multicast address, when it is the only destination I am interested in security. Here is exactly what I want to do - no more, no less (although I can use the mode of transport instead of tunnel at some point):

#! / bin/bash

Echo 2 >/proc/sys/net/ipv4/conf/eth0/force_igmp_version

# NOTE: To avoid the possibility of breaking IGMPv2 snooping, src should ONLY be defined for SHIPPERS, NOT for RECEIVERS! Otherwise, joins will be compromised by the IPsec encryption and the switch will not detect them.

IP xfrm State flush; IP political xfrm hunting

State of xfrm IP add src 10.0.2.15 dst 239.192.1.1 proto esp spi 0x54c1859e tunnel mode reqid 0x67cea4aa auth-trunc hmac\ (sha256\) 128 0xc8a8bf5ce6330699c3500bd8d2637bc1fa26929bab747d5ff2a1c4dddc7ce7ff enc cbc\ (aes\) 0xfdce8eaf81e3da02fa67e07df975c0111ecfa906561e762e5f3e78dfe106498e # aead rfc4106\ (gcm\ (aes\) \) 0x123456789abcdef0baddeed0deadbeeffeedface900df00d0fedcba987654321 128 #Error: duplicate 'ALGO-TYPE': 'aead' is the second value.

xfrm IP strategy add 10.0.2.15 src 239.192.1.1 dst dir output stat CBC 10.0.2.15 dst 239.192.1.1 proto reqid 0x67cea4aa tunnel mode esp

xfrm IP policy add 10.0.2.15 src 239.192.1.1 dst dir in src 10.0.2.15 stat dst 239.192.1.1 proto reqid 0x67cea4aa tunnel mode esp

xfrm IP strategy add 10.0.2.15 src dst 239.192.1.1 dir fwd stat 10.0.2.15 src dst 239.192.1.1 proto reqid 0x67cea4aa esp tunnel mode

A graphical interface which requires me to work in step by step mode (in particular to implement a relatively simple configuration of the shared key) with no idea of what irrelevant or confusing questions await us doing me no favor. And while this computer uses Windows 7, the eventual target can use something older or newer. I want to do is create the portable equivalent of a preferred scenario, no instructions to repeat the time-consuming and confusing. This approach exist? (I already checked cygwin and there seems to be no support for the ip packet, and even if there were, it seems not support sudo is.)

Hello

Thank you for visiting Microsoft Community and we provide a detailed description of the issue.

I suggest you to send your request in the TechNet forums to get the problem resolved.

Please visit the link below to send your query in the TechNet forums:

https://social.technet.Microsoft.com/forums/en-us/home?category=WindowsServer

Hope this information is useful. Please come back to write to us if you need more help, we will be happy to help you.

L2TP/IPSec connection failed for Windows 7 Ultimate for Windows Server R2 2012 with error 789.

For this preface, I use the server in a lab environment and trying to set up my own VPN L2TP/IPSec. I opened the UDP 500 and 1701 TCP ports on my router for the interface of the primary server where is the VPN. It is on a Comcast connection consumer where other applications such as Arma 3 servers dedicated and IIS have worked.
The RRAS role to run based on this tutorial: http://www.thomasmaurer.ch/2014/01/how-to-install-vpn-on-windows-server-2012-r2/ I have only strayed from it using DHCP forwarding instead of a static pool of IP as my router is running a DHCP server, and if I understand correctly, the router must give IP addresses of the internal IP pool which I use for everything else. I also use the PSK authentication rather than be based certificate. For the authentication of users I have MS-CHAP-V2 and CHAP enabled; I connect from the remote device with an account on that I created on the server for the purpose of this VPN I know RRAS connections are allowed.

When the connection I get error 789: L2TP connection attempt failed because the security layer detected a processing error during initial negotiations with the remote computer. From what I've seen, this can be fixed by checking that the two ends of the connection are not behind a NAT (not an option), verification of the PSK (already done) and certificates (not applicable). If there is a way to solve this problem that would be great, but my server will always be behind a NAT firewall because the router is one, and the modem becomes one if several devices are connected to him without a router between the two.

This issue is beyond the scope of this site and must be placed on Technet or MSDN

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

http://social.msdn.Microsoft.com/forums/en-us/home

Issue on IPSEC

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