Cisco VPN :: One Way Encryption / Decrypting Not Encrypting ASA 5505
Oct 29, 2012
I've been troubleshooting this issue and was hoping to get some more feed back and maybe point out an error if I'm not seeing it. I recently setup a remote access VPN on Cisco ASA 5505. Everything appeared to work at first and the IPsec client connect. However if you look at the packets being encrypted an decrypted on the Client side only the encrypted counter is incrementing and the decrypted stays at 0. The opposite is true on the ASA side the decrypted continures to increment and the encrypted stays at zero. My first thought was maybe a mis configured NAT 0 statement or not defining the correct Split tunnel ACL but I have verified that. The asa version 8.2(5), I'll also list a packet-tracer I did from an inside host to VPN IP. [code]
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Dec 14, 2012
I 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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Jul 20, 2011
We have a situation where we need to encrypt the traffic on a Layer 2 V LAN. We have a Cisco Switch on each side but the fiber it runs over is leased and encryption (AES256 minimum) is required on a leased line. We have 2 ASA5505s that we could use on each side. Not sure what would be the best setup for this scenario (Site to Site). Or is there something better than using 2 ASAs on each side?
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Jul 23, 2011
Is it possible to remove the high encryption (k9) from an Asa and make it into k8 model?
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Oct 18, 2011
I'm troubleshooting an issue with a new site-to-site vpn setup between 1800 series routers. The tunnel is up but not encrypting traffic on one router, when IP CEF is disabled traffic is encrypted and decrypted!
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Jul 15, 2012
im trying to configure IpSEC over Gre tunnel, but the traffic pass unencrypted, i cant find why this is happening. Here are the confg of the two routers (1841)
OFICINA#sh run br
Building configuration...
Current configuration : 1281 bytes
!
version 12.4
service timestamps debug datetime msec
[Code].....
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Nov 8, 2011
We have one Cisco 2960 Catalyst switch.Rule Title: The administrator will ensure passwords are not viewable when displaying the configuration. Right now my user passwords are visible in plaintext. I tried #username <admin> password 7 - but everything I try there is an error I also tried #username <admin> secret but it says I can't have both a secret and password for a single account.
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Jul 28, 2012
Where can i find my wep encryption key?
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Nov 30, 2012
Is it possible to have a 64 bit and 128 bit encryption key activated on the same router at the same time - one for laptop and one for wireless printer
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Jun 23, 2012
I need to locate my encryption key.
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Feb 3, 2012
Is 3DES on ISAKMP considered to be secured for your average site (other options are AES/DES)? I'd imagine AES should be much stronger but what about DES, is that considered adequate or broken? Is there any proof of concept attack against 3DES on ISAKMP (or ISAKMP in general)?
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Oct 7, 2011
how 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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Oct 2, 2012
A wlan on my controller is configured for WPA2, AES encryption and a PSK. A vendor will supply me with a wireless device for this wlan. The vendor asks if we use AES 128 or AES 256. I had always believed we use AES256 but I can't verify this. How can I verify this to the vendor?
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Jul 2, 2011
I have a Cisco 877 router and I configured it to act as a VPN server, supporting both PPTP and L2TP VPNs. I can succesfully connect to it from Windows computers using the built-in VPN software.There is only one problem: when using a PPTP VPN, encryption doesn't work. If I configure the client to require encryption (default setting), the connection fails with an error about the remote endpoint not supporting it. If I remove the encryption requirement, the connection succeeds. I've also tried tweaking the encryption settings (40/128 bits), but this didn't work either. [code]
The router's IOS version is 15, and it fully supports encryption. The strangest thing is, encryption is actually required in the router config; but not only the router doesn't seem to offer it... it also accepts unencrypted connections, which it shouldn't. It's like the ppp encrypt mppe auto required command is completely ignored.
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Dec 21, 2012
I've some VPN encryption method questions.Is it recommended to use different encryption algorithms for both VPN phases (phase 1 and phase 2)?I’ve read once that it is much secure to use different encryption algorithms for each phase.In my opinion, I would go for the AES256 algorithm in both phases. But maybe it is a better idea to use AES128 or AES192 in the first phase and AES-256 in the second phase… I don't know.After saying this, I’m also wondering about the best VPN encryption setup for a site-to-site VPN (IKEv2) when using a Cisco ASA like the 5510, 5520 or the 5515.Which encryption method is recommended for phase 1 and phase 2Which PFS / DH-group should be used (considering CPU load and security)
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Sep 13, 2012
the guy who set the key for WPA-PSK and another one for WEP left... Anyway we can figure out what the key was?
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Dec 5, 2012
I have two cisco airenet 1252 autonamous access point that are configured as point to point bridge. Now I want to confiure AES encryption or WPA2 using a pre-shared key however I do not see the option to do this . The only option I see under ciphers are:
wep 128
wep 40
TKIP
[Code].....
Is it possible to use either AES or WPA2 using a pre-shared key on the 1252 autonamous access point? preferably using the web interface.
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Mar 14, 2011
Due to network security audit we are interesded in encryption algorithm used for authentication of administrator and operators in Starent Networks ST40 Intelligent Mobile Gateway. To be more clearly, we need to know what type of hash is used for password storing when "showsecrets" command is omitted.
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Jun 29, 2011
I have a Cisco 877 router at home, and I'm trying to configure it to act as a VPN server in order to be able to connect to my home network when I'm outside; I want it to work with standard Microsoft VPN client software (which supports PPTP and L2TP).
This is the output of the "show version" command:
Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 15.0(1)M, RELEASE SOFTWARE (fc2)Technical Support: [URL] Copyright (c) 1986-2009 by Cisco Systems, Inc.Compiled Wed 30-Sep-09 08:42 by prod_rel_team
ROM: System Bootstrap, Version 12.3(8r)YI6, RELEASE SOFTWARE
The router has quite a basic setup: a single username with privilege level 15, a single VLAN comprising all four Ethernet ports, an ADSL connection to my ISP, an internal IP address of 192.168.42.1/24, an external IP address assigned by my ISP, NAT enabled.
This is my current configuration (stripped of non-relevant or private information):
service password-encryption
aaa new-model
aaa authentication login default local aaa authorization console aaa authorization exec default local
aaa session-id common
[Code]...
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Jun 20, 2011
I have 2 Cisco 2811 routers that are installed in different locations. I set up a tunnel connection between the two routers.
[code]...
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Dec 3, 2012
I want to change my encrytion password-How do I do it?
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Dec 10, 2011
I have laptop, mac and xbox 360 all working, just got ps3 and cannot connect it, cannot find wep key for wifi 12 hours plus trying to get this done.
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Dec 26, 2012
How do I change my wi-fi password?
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Feb 3, 2012
attempting to connect a blu-ray player and it asks for encryption key for the network.
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Apr 25, 2013
I can't find information about two features in 1524PS and 1552E/EU:
1. Does it have WEP encryption ?
2. Does it have SNMPv3 protocol for monitoring and remote managing ?
I guess, that software is similar in both, so answer will be the same in 1524PS and 1552E/EU.
How to confirm this features in 1524PS ?
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Aug 16, 2011
We want to provide an end to encryption service using an ACE02 in a CAT 6509E. This is covered in the ACE config guide so should be OK. The issue is that we want to include traffic inspection using an IDSM2 so we need to seperate the decrypt and encryption stages and send cleartext traffic to the IDMS2. The Security and Virtualization in the Data Center pdf page 18/19 suggests that it might be possible. The design depicted there though is only doing SSL termination, then sending the clear text onto a WAF, and onto IPS but it does say end-to-end encryption is also possible.So in essence what we want to do is have traffic from clients destined for the server farm decrypted by the ACE and sent to the IDS. We then want the traffic to return from the IDS to the ACE to be encrypted and sent onto the server farm.
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Jun 2, 2011
How does the implementation of encryption wep wpa etc in hardware cisco wap4410N ?
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Apr 27, 2013
I am truly struggling with the changes after 8.21. I am trying to get a VPN up between two sites. This is the B end, I am sure there are a bunch of problems in the other end too. Eg. the tunnel NAT does not have the right priority 1.when I establish the tunnel I get this:
3 Sep 01 2008 11:23:37 Tunnel Manager has failed to establish an L2L SA. All configured IKE versions failed to establish the tunnel. Map Tag= outside_map. Map Sequence Number = 1.
# packet-tracer input inside tcp 10.2.32.11 80 10.1.1.10 80
Phase: 1
Type: ACCESS-LIST
Subtype:
[code]....
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May 29, 2012
I am trying to setup a remote-access vpn (client device is an iphone or PC) on asa 8.0 with a transform-set without encryption and without hashing ( crypto ipsec transform-set noenc esp-null esp-none ). In this scenario, it does not work and all gives me "phase 2 mismatch" ...below is the debug of isakmp and ipsec.
i tried to change the transform set by using hashing without encryption (crypto ipsec transform-set myset esp-null esp-sha-hmac). it worked on the PC but not the iphone. my target is for the iphone to work.
ciscoasa# sh cryciscoasa# sh crypto isa sa
There are no isakmp sasciscoasa# ter monciscoasa# May 29 23:33:44 [IKEv1]: IP = 91.232.100.3, IKE_DECODE RECEIVED Message (msgid=0) with payloads : HDR + SA (1) + KE (4) + NONCE (10) + ID (5) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + NONE (0) total length : 741May 29 23:33:44 [IKEv1 DEBUG]: IP = 91.232.100.3, processing SA payloadMay 29 23:33:44 [IKEv1 DEBUG]: IP = 91.232.100.3, processing ke payloadMay 29 23:33:44 [IKEv1 DEBUG]: IP = 91.232.100.3, processing ISA_KE payloadMay 29 23:33:44 [IKEv1 DEBUG]: IP = 91.232.100.3, processing nonce payloadMay 29 23:33:44 [IKEv1 DEBUG]: IP = 91.232.100.3, processing ID payloadMay 29 23:33:44 [IKEv1
[code]....
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Oct 22, 2012
I have a cisco asa 5510 running ver 8.02, when i navigate to "remote access vpn-> advanced->ssl settings" i could not see any available algorithms under encryption section. How can i add the encryption algorithm in? I need the encryption algorithm as i want to enable ssl authentication using cert on my asa interface.
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Aug 16, 2011
Any 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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Jun 19, 2011
Does Cisco 1142n Aironet Access Point support WPA-PSK with AES encryption ?
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Jun 21, 2011
To 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?
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