To Configure IPSEC Encryption
Jun 20, 2011I have 2 Cisco 2811 routers that are installed in different locations. I set up a tunnel connection between the two routers.
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Cisco :: Why 2 Encryption Keys For IPSEC VPN
Oct 7, 2011how IPSEC VPN works but i hit a stumbling block understanding symmetric encryption keys.Here is my understanding about the process
1.Peers will negotiate plocies
2.Authenticate using pre-shared or certificates
3.Exchange DH Public Keys
4.Using Public keys encrypt symmetric key and exchange the same key which will be useful for communication
5.maintain sessions
But when we are configuring we will define encryption keys in isakmp phase and ipsec transform set ,i thought we will use the same encryption key for both management and data communication in fact i thought management phase is to give us a securely exchanged encryption key for the data tunnel.But we can use 2 different encryption keys in 2 phase i am bit confused.
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Dec 14, 2012I would like to know if I have only using IKEV2 to connect site to site VPN with Cisco 5505 device to connect few site. Which encryption method is better to choose with faster and stable IPsec encryption proposal,AES256, AES192, AES, 3DES, DES ?? which one is the best in IKEV2 site to site VPN tunnel?
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Jun 21, 2011To configure the GRE tunnel over IPSEC with OSFT via Encryption module from Cisco Router 3845, I have few queries:
1. Does the router 3845 support hot swap for encryption module?
2. Does the router require to be rebooted after plug in encryption module?
3. Any samples configuration for GRE tunnel over IPSEC?
Cisco WAN :: 3845 - IPSec Encryption Overhead
May 5, 2010How to reconcile what I've observed on our routers on a tunnel interface. The maximum amount of data I can get across the tunnel is 1339 bytes, which seems just a little bit too small. Background: we have two 3845 routers with IOS 12.4(3a) advanced ip services. I have tunnel interfaces on both routers, interface configs are below.
crypto ipsec transform-set MY_TSET esp-3des esp-sha-hmac comp-lzs crypto ipsec profile MY_VTIset transform-set MY_TSET
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When I test the mtu of the source destination interfaces I get 1500 bytes, as you would expect from an Ethernet connection to a service providers MPLS network. See output below:
Router1#ping ip 10.252.0.18 df-bit size 1500
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When I test the mtu of the tunnels I get 1339 bytes, see the output below.
router1#ping ip 10.1.40.133 df-bit size 1340
Type escape sequence to abort.Sending 5, 1340-byte ICMP Echos to 10.1.40.133, timeout is 2 seconds:Packet sent with the DF bit setM.M.MSuccess rate is 0 percent (0/5)
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That comes to a total of 1420, which is 80 bytes short of the mtu of the source/destination interface of the tunnel.
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Aug 16, 2011Any configuration example where i have a Cisco 1140 connected with a trunk to one router and with the Cisco 1140 i broadcast one SSID per vlan, one with WPA2 and other "open".?I ask because i see that when i turn on cipher, i cant configure an SSID without encryption.
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Mar 20, 2012I am in a situation where I share internet access with roommates. We have a Gateway which is conected to the provider and which delivers ethernet and WiFi signal.
In order to isolate myself from my roomates and to protect my network connection, both wired and WiFi, I would like to plug in the Ethernet cable I get from the Gateway to my router, and then configure my router's firewall and WiFi enctryption to maximize my safety.
However, I am having some problems. I have already configured the router as "router" and not "Gateway" and I am trying to assign it an IP address different from the default one, which is the one the gateway has, and a ranger of DHCP IP's, also different from those of the Gateway. In other words, 192.1681.N.1 for the router and start from there.
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Feb 27, 2011I would like to configure a vpn l2l ipsec for a friend. i have a router cisco 877 i configure it but vpn doesn't work.Above my configuration:
Current configuration : 5443 bytes!version 12.4no service padservice timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption!hostname Laboratorio!boot-start-markerboot-end-marker!!aaa new-model!!aaa authentication login default localaaa authorization exec default local!aaa session-id common!resource policy!ip cefno ip dhcp use vrf connectedip dhcp excluded-address 172.16.1.1ip dhcp excluded-address 192.168.1.1ip dhcp excluded-address 192.168.1.254!ip dhcp pool HostPc network 172.16.1.0 255.255.255.0 default-router 172.16.1.1 dns-server 8.8.8.8 8.8.4.4!ip dhcp pool MPLs network 192.168.1.0 255.255.255.0 default-router 192.168.1.254 dns-server 8.8.8.8 8.8.4.4!!!!crypto pki trustpoint TP-self-signed-4019649088enrollment selfsignedsubject-name cn=IOS-Self-Signed-Certificate-4019649088revocation-check nonersakeypair TP-self-signed-4019649088!!crypto pki certificate
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Configure Ipsec In Local Lan Between 3 Computers?
Sep 13, 2011I need to connect 3 computers in local lan by using ipsec on win7. How can I do that? I tried to do something from windows firewall; but I see incorrect header checksum errors in wireshark.
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May 9, 2011We have a business need that we have to set up a IPsec L2L tunnel (from multiple locations) to a business partner, we require that the connection can only be initiated from our side, not business partner side. I searched the web, one option is configure our side ASA to initate IKE only, this does not seem to meet our requirement, because once IPsec SA is up, IP layer traffic will flow freely in either direction; the other option people suggested is to use VPN filter in tunnel group policy, but the documention of how to use this vpn-filter to enforce one way traffic policy is not crystal clear to me; I actually configured reflexive ACL on core L3 switch before the traffic hits ASA to reflect/evalulate specific traffic to businness partner's LAN network, that worked well. However one of our branch office's core L3 switch is Cat4K which does not support reflexive ACL with the image it is currently running, so I am stuck again .
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The problem seems to be that the pix never sees the interesting traffic for the tunnel, and never tries to initiate a connection. I have enabled crypto ipsec and crypto isakmp debugs, but no data is ever displayed, even when attempting to access a device on the remote side of the tunnel! Someone had tried to set up this device with some tunnels in the past, but was never successful, so I'm thinking there might be remaining commands in the running-config causing problems.
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%ASA-7-710005: UDP request discarded from my external IP/35781 to external:ASA-external/500
%ASA-7-710005: UDP request discarded from my external IP/35781 to external:ASA-external/137
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In this case, how many IPSec Tunnels I can configure?
how configuring IPSec Tunnels on my router?
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Nov 11, 2012How to configure an IPSec VPN with router RV042G.I need to know how to configure an IPSec VPN. Cisco Router with RV042G.
I spend this client your VPN parameters. [code]
Cisco VPN :: Configure IPsec Stateful Failover On 891?
Sep 15, 2011We have purchased a couple of Cisco 891 routers - both are running IOS 15.0(1) M5 licensed with advanced IP services (default). The literature for these devices on Cisco's website claims they support IPsec stateful failover on advanced IP services.
Our intention is to configure them with HSRP and IPsec stateful failover to provide a highly-available default gateway and VPN end-point.
I have configured HSRP and that seems to work fine. My problem is that I cannot configure IPsec stateful failover. The documentation that I have found implies that I need to configure inter-device redundancy on a particular HSRP group and use the physical IP addresses on the interfaces within that group to allow stateful failover communication between the routers however the routers do not recognise the 'redundancy' command in config mode...
e.g.
(config)# redundancy inter-device
^
% Invalid input detected at '^' marker.
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Jan 2, 2013I have an RV220w in office, which I have configure it for ipsec vpn connections. Behind router there is a NAS for file storage. [code]I have managed to connect to router from my home with ShrewVPN and I can ping every client connected to RV220w.The problem is that I can't connect to neither to router's web interface nor to NAS web interface or any other intranet web page ( the browser doesn't give any error, but keeps loading without showing the web page). Although, I can access web pages from my laptop.Also, in windows file explorer when I connect to NAS, although I can browse folders I can't copy files from my laptop to NAS and vice versa, I always get timeout error (I have checked the permissions to NAS and in addition I succeed to copy a small txt file 1kb, but no luck with bigger files).I also tried with QuickVPN client, but I had the same results. When I connect with pptp from windows everything works like a charm.My laptop has windows 7 64bit.
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Mar 3, 2012This is for an ASA 5505. I am trying to configure an AnyConnect and IPSec VPN connection and I think it's almost there but not quite yet. When I login from an outside network it gives me the following error for the SSL AnyConnect "The VPN client was unable to setup IP filtering" and "Secure VPN connection terminated by peer" for the IPSec. I previously had this working since Oct, but I was trying to modify it a little to accept LT2P for native Android VPN clients and that messed up everything that I had working perfectly. I checked everything as best as I could to try and match the previous settings but still can't get the darn thing to work. I am trying to also do Hairpinning, I want all VPN traffic to pass through this router... remote LAN and Internet traffic for times when I am at unfamiliar wifi hotspots and need to check email securely. I have included my running config. I also need to configure the ASA to accept native Android VPN connections. I read the most popular thread that worked for a few users but while doing those modifications that is where everything went downhill. T
: Saved
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ASA Version 8.4(2)
!
hostname ciscoasa
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
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Oct 25, 2011ASA 5505 8.2.1
ASA 5520 8.4
We currently have a tunnel configured between 2 ASAs
1- Is it possible to assign 1.5 Mbits of Bandwidth(BW) to this tunnel?. Then if Tunnel number 2 is configured I could assign 2 Mbits to that one for example?
I am not referring to prioritizing certain type of traffic over the IPsec tunnel, I am referring to Tunnel 1 has 1.5 Mbits of BW guaranteed for all traffic that goes thru it. Same for tunnel 2
Then
2- How to monitor the amount of BW in an IPsec tunnel?
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