VPN and SSH key phenomena

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• Issue of Telnet and SSH on Cisco 3750.

  I turn on Cisco 3750 and everything so I wasn't able to connect in the area. I even changed the source interface and update transport under the VTY lines input method, no luck.

  Can I choose to disable SSH by removing the corresponding lines of configs and RSA keys. And I changed the entry to transport back to Telnet. After the reboot of the switch, I'm still not able to connect despite the fact that the box is accessible.

  Any help?

  Thank you

  Jean-Marie

  Hello

  This should help to confirm the configuration and troubleshooting SSH on your device: -.

  http://www.Cisco.com/c/en/us/support/docs/security-VPN/Secure-Shell-SSH/4145-SSH.html

  I hope this helps.
  Kind regards
  Dinesh Moudgil

  PS Please rate helpful messages.

• remote VPN and vpn site to site vpn remote users unable to access the local network

  As per below config remote vpn and vpn site to site vpn remote users unable to access the local network please suggest me a required config

  The local 192.168.215.4 not able ping server IP this server connectivity remote vpn works fine but not able to ping to the local network vpn users.

  ASA Version 8.2 (2)
  !
  host name
  domain kunchevrolet
  activate r8xwsBuKsSP7kABz encrypted password
  r8xwsBuKsSP7kABz encrypted passwd
  names of
  !
  interface Ethernet0/0
  nameif outside
  security-level 0
  PPPoE client vpdn group dataone
  IP address pppoe
  !
  interface Ethernet0/1
  nameif inside
  security-level 50
  IP 192.168.215.2 255.255.255.0
  !
  interface Ethernet0/2
  nameif Internet
  security-level 0
  IP address dhcp setroute
  !
  interface Ethernet0/3
  Shutdown
  No nameif
  no level of security
  no ip address
  !
  interface Management0/0
  Shutdown
  No nameif
  no level of security
  no ip address
  management only
  !
  passive FTP mode
  clock timezone IST 5 30
  DNS server-group DefaultDNS
  domain kunchevrolet
  permit same-security-traffic intra-interface
  object-group network GM-DC-VPN-Gateway
  object-group, net-LAN
  access extensive list ip 192.168.215.0 sptnl allow 255.255.255.0 192.168.2.0 255.255.255.0
  192.168.215.0 IP Access-list extended sheep 255.255.255.0 allow 192.168.2.0 255.255.255.0
  tunnel of splitting allowed access list standard 192.168.215.0 255.255.255.0
  pager lines 24
  Enable logging
  asdm of logging of information
  Outside 1500 MTU
  Within 1500 MTU
  MTU 1500 Internet
  IP local pool VPN_Users 192.168.2.1 - 192.168.2.250 mask 255.255.255.0
  ICMP unreachable rate-limit 1 burst-size 1
  enable ASDM history
  ARP timeout 14400
  NAT-control
  Global 1 interface (outside)
  NAT (inside) 1 0.0.0.0 0.0.0.0
  Route outside 0.0.0.0 0.0.0.0 59.90.214.1 1
  Timeout xlate 03:00
  Timeout conn 01:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
  Sunrpc timeout 0:10:00 h323 0:05:00 h225 mgcp from 01:00 0:05:00 mgcp-pat 0:05:00
  Sip timeout 0:30:00 sip_media 0:02:00 prompt Protocol sip-0: 03:00 sip - disconnect 0:02:00
  Timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
  timeout tcp-proxy-reassembly 0:01:00
  dynamic-access-policy-registration DfltAccessPolicy
  the ssh LOCAL console AAA authentication
  AAA authentication LOCAL telnet console
  AAA authentication http LOCAL console
  AAA authentication enable LOCAL console
  LOCAL AAA authentication serial console
  Enable http server
  x.x.x.x 255.255.255.252 out http
  http 192.168.215.0 255.255.255.252 inside
  http 192.168.215.0 255.255.255.0 inside
  No snmp server location
  No snmp Server contact
  Server enable SNMP traps snmp authentication linkup, linkdown cold start
  Crypto ipsec transform-set esp-3des esp-sha-hmac RIGHT
  life crypto ipsec security association seconds 28800
  Crypto ipsec kilobytes of life - safety 4608000 association
  Crypto-map dynamic dynmap 65500 transform-set RIGHT
  card crypto 10 VPN ipsec-isakmp dynamic dynmap
  card crypto VPN outside interface
  card crypto 10 ASA-01 set peer 221.135.138.130
  card crypto 10 ASA - 01 the transform-set RIGHT value
  crypto ISAKMP allow outside
  crypto ISAKMP policy 10
  preshared authentication
  3des encryption
  sha hash
  Group 2
  life 86400
  crypto ISAKMP policy 65535
  preshared authentication
  the Encryption
  sha hash
  Group 2
  lifetime 28800
  Telnet 192.168.215.0 255.255.255.0 inside
  Telnet timeout 5
  SSH 0.0.0.0 0.0.0.0 outdoors
  SSH timeout 5
  Console timeout 0
  management-access inside
  VPDN group dataone request dialout pppoe
  VPDN group dataone localname bb4027654187_scdrid
  VPDN group dataone ppp authentication chap
  VPDN username bb4027654187_scdrid password * local store
  interface for identifying DHCP-client Internet customer
  dhcpd dns 218.248.255.141 218.248.245.1
  !
  dhcpd address 192.168.215.11 - 192.168.215.254 inside
  dhcpd allow inside
  !
  a basic threat threat detection
  Statistics-list of access threat detection
  no statistical threat detection tcp-interception
  Des-sha1 encryption SSL
  WebVPN
  allow outside
  tunnel-group-list activate
  internal kun group policy
  kun group policy attributes
  VPN - connections 8
  Protocol-tunnel-VPN IPSec
  Split-tunnel-policy tunnelspecified
  Split-tunnel-network-list value split tunnel
  kunchevrolet value by default-field
  test P4ttSyrm33SV8TYp encrypted password username
  username kunauto password bSHrKTGl8PUbvus / encrypted privilege 15
  username kunauto attributes
  Strategy Group-VPN-kun
  Protocol-tunnel-VPN IPSec
  tunnel-group vpngroup type remote access
  tunnel-group vpngroup General attributes
  address pool VPN_Users
  Group Policy - by default-kun
  tunnel-group vpngroup webvpn-attributes
  the vpngroup group alias activation
  vpngroup group tunnel ipsec-attributes
  pre-shared key *.
  type tunnel-group test remote access
  tunnel-group x.x.x.x type ipsec-l2l
  tunnel-group ipsec-attributes x.x.x.x
  pre-shared key *.
  !
  class-map inspection_default
  match default-inspection-traffic
  !
  !
  type of policy-card inspect dns preset_dns_map
  parameters
  maximum message length automatic of customer
  message-length maximum 512
  Policy-map global_policy
  class inspection_default
  inspect the preset_dns_map dns
  inspect the ftp
  inspect h323 h225
  inspect the h323 ras
  Review the ip options
  inspect the netbios
  inspect the rsh
  inspect the rtsp
  inspect the skinny
  inspect esmtp
  inspect sqlnet
  inspect sunrpc
  inspect the tftp
  inspect the sip
  inspect xdmcp
  inspect the icmp
  !
  global service-policy global_policy
  context of prompt hostname
  call-home
  Profile of CiscoTAC-1
  no active account
  http https://tools.cisco.com/its/service/oddce/services/DDCEService destination address
  email address of destination [email protected] / * /
  destination-mode http transport
  Subscribe to alert-group diagnosis
  Subscribe to alert-group environment
  Subscribe to alert-group monthly periodic inventory
  monthly periodicals to subscribe to alert-group configuration
  daily periodic subscribe to alert-group telemetry
  Cryptochecksum:0d2497e1280e41ab3875e77c6b184cf8
  : end
  kunauto #.

  Hello

  Looking at the configuration, there is an access list this nat exemption: -.

  192.168.215.0 IP Access-list extended sheep 255.255.255.0 allow 192.168.2.0 255.255.255.0

  But it is not applied in the States of nat.

  Send the following command to the nat exemption to apply: -.

  NAT (inside) 0 access-list sheep

  Kind regards

  Dinesh Moudgil

  P.S. Please mark this message as 'Responded' If you find this information useful so that it brings goodness to other users of the community

• SSH keys no longer work after macOS Sierra Update

  Hello, I have a problem to connect my servers with my previously stored private ssh key in file .ssh with terminal commands or third-party applications. I should mention that I activated the filevault during the upgrade process. I see that my passphases are stored in the keychain, but I need to enter my password every time I want to connect to servers.

  Hello Marshall,

  Try to create a new ssh key. I think Sierra includes updated logic crypto and he doesn't like really old keys.

• Import a public ssh key for a specific user of DRAC via racadm?

  Is there a racadm command to download and install a public ssh key into account a specific drac of the user.

  In the GUI, I see features to add 4 different keys per user access from remote devices with the key private without a password for ssh.

  I have not found a command for it in the last iDRAC CLI PDF 7/8.

  I don't see that installed public keys are exported with an export of the server profile which would mean that access would be lost when profile importing. Is this correct? If so is this remedied the iDRAC future releases?

  You can use "racadm sshpkauth" to import or delete the public SSH key users to iDRAC.  You can get more details on the use of race using command "racadm help sshpkauth" or the RACADM CLI guide (link below)

  http://www.Dell.com/support/manuals/us/en/19/idrac7-8-lifecycle-controller-v2.30.30.30/iDRAC_RACADM_Pub/sshpkauth?GUID=GUID-BE12ABD1-4995-4FA3-B090-9CB41321B7A4&lang=en-us

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• IronPort SSH Keys vulnerability patch

  Hello

  customer is running WSA 8.8.0 - 085. In the web pages of upgrades available, we show the file "vulnerability cisco-sa-20150625-ironport Fix SSH Keys." When you try to apply it, web pages and the CLI, such as suggested by RN, it shows the patch as it has already applied:

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  Patch 'Vulnerability cisco-Ironport SSH Keys' is already applied
  Facility upgrade is complete.

  I think it's BECAUSE WSA has been upgraded after June 25, a release already includes this patch.

  Question:

  -How can I be sure that SSH keys are ok?

  -Why the patch stay in the upgrades available? Can I delete it?

  Thanks in advance

  Hello

  Thanks for reaching out, here is the link that provide details around this:

  https://supportforums.Cisco.com/blog/12543046/multiple-default-SSH-keys-...

  and what is "why patch stay in available upgrades? Can I remove it? »

  This patch will be deleted once you upgrade to version 9.0.x and now cannot be "off put into service.

  Kind regards

  Zack

• generation SSH key

  I use a 506th PIX.  I already have some ssh addresses, but I need to add a new ssh address.  Do I need to generate a new key or should I use the existing key?  In addition, if there is already a key genereated must cleared and a new generated when new ssh addresses are added?

  skillsadmin wrote:
  I am using a PIX 506e.  I already have some ssh addresses, but I need to add a new ssh address.  Do I need to generate a new key or does it use the existing key?  Also, if there is already a key genereated does it need cleared and a new one generated when new ssh addresses are added?
  

  If you add more IPS that are allowed to connect to the pix using ssh, then you do not generate a new key. The existing ssh key will be used.

  Jon

• Authorized SSH Keys

  I try to configure authentication using SSH on my ID I authorized keys generated my pair of keys using Puttygen.

  When I go in configure my key allowed, I can't determine what my Public Exponent is supposed to be. Anyone can shed some light?

  Thank you

  Mike J.

  PuTTY has been my favorite client SSH for nearly four years.

  I am currently using a recent version of PuTTY (2 July 2004), and the following instructions have been written for this new version. However, build everything from a snapshot taken in recent years should work.

  The main problem in establishing authorized SSH keys is that only the oldest RSA1 key format is acceptable. This means that you must indicate your key generator to create a RSA1 key, and you need to restrict the SSH client using the SSH1 protocol.

  Here is how you do it with recent versions of PuTTY:

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  (2) in the group 'Settings' at the bottom of the dialog box, click the type of key SSH1. Also, I would recommend to set the number of bits in the key generated to 2048.

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  (4) clear on the 'key' comment editing area

  (5) to select all the text in the pane labeled "Public key for pasting into authorized_keys file" and press Ctrl-C.

  (6) areas of edition of type a password in the "Key passphrase" and "Confirm passphrase".

  7) click "save private key".

  (8) save the PuTTY private key file to a directory that is private to your Windows login (in the "Documents and Settings / (userid) /My Documents" subtree under Win2K/XP).

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  Port: 22

  Connection:

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  Connection/SSH:

  Preferred SSH version: 1 only

  Connection/SSH/Auth:

  Private key for authentication file: Navigate to the. PPK file saved in step 8 above.

  Session: (back to top)

  Saved sessions: (enter the sensor name, click Save)

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  Use password authentication to connect to the sensor CLI, since we do not yet have the public key on the sensor.

  (12) type the following command in CLI and press ENTER:

  Configure the terminal

  (13) the following command in the CLI, but do not press ENTER again (make and type a space at the end):

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  (14) right click of the mouse in the PuTTY terminal window... causing material Clipboard copied in step 5 to be entered in the CLI

  (15) press on enter

  (16) type the following command in CLI and press ENTER:

  output

  (17) confirm that the authorized key has been entered correctly. The following CLI command and press ENTER:

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  (18) leave the CLI IDS. The following CLI command and press ENTER:

  output

  =====

  In my next post, I will finish these instructions...

• PIX and SSH - access to PIX via SSH

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  example.com domain name

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