Update: Securing Cisco ASA SSH server Enabling SSH has been covered here but it only talked about routers and switches. How about Cisco ASA? Today, I had to learn how to do it using CLI and not ASDM since I couldn’t find where the equivalent of aaa authentication ssh console LOCAL and crypto key gen rsa mod 4096 in the ASDM. Since I am really new to Cisco ASA, I am not well-versed in issuing. Cisco ASA SSH, Don’t Forget To Generate A Key. The fact that Cisco doesn’t do this automatically makes me very very nervous. The networks running Cisco appear. Under 'Specify the addresses of all hosts/networks which are allowed to access the ASA using ASDM/HTTPS/Telnet/SSH', you should add the static IPs of the devices or servers you wish to access the firewall from. Click Add on the right. Select the radio button next to SSH. Select 'Inside' as the interface. Sep 06, 2014 Configure SSH Access in Cisco ASA. Step 1: Configure Enable password. (Optional) ASA(config)# enable password system@123. Step 2: Create a username with password. ASA(config)# username bipin password cisco@123. Step 3: Configure this local username to authenticate with SSH. ASA(config)# aaa authentication ssh console LOCAL. Step 4: Create RSA key pair. Jul 19, 2017  Today we are heading forward in our journey where we will configure our Cisco ASA to get accessed from the firewall admin's local system via ASDM & SSH. Configuring ASDM & SSH on Cisco ASA.

• Configure Ssh Cisco Asa
• Enable Asdm On Asa

This guide will walk you through the basics of hardening SSH access to your Cisco ASA firewall using ASDM. If you're like me, you'd rather have a GUI than spending the day Googling CLI commands.

4 Steps total

Step 1: Login to ASDM

Step 2: Change the default allow SSH version from 1 to 2

Go to Configuration > Device Management > Management Access > ASDM/HTTPS/Telnet/SSH

Under SSH Settings, change the value of 'Allowed SSH Version(s)' from 1 to 2.

Step 3: Change the default Diffie-Hellman group from 1 to 14

Remain in Configuration > Device Management > Management Access > ASDM/HTTPS/Telnet/SSH

Under SSH Settings, change the radio toggle of 'DH Key Exchange' from Group 1 to Group 14.

Step 4: Lock down SSH access to the firewall

Remain in Configuration > Device Management > Management Access > ASDM/HTTPS/Telnet/SSH

Under 'Specify the addresses of all hosts/networks which are allowed to access the ASA using ASDM/HTTPS/Telnet/SSH', you should add the static IPs of the devices or servers you wish to access the firewall from.

Click Add on the right.

Configure Ssh Cisco Asa

Select the radio button next to SSH.

Select 'Inside' as the interface.

Enable Asdm On Asa

Enter the static IP of the device/server.

Enter 255.255.255.255 as the subnet mask.

Ssh generate private key 4096. Generate 4098 Bit Key Generate 4096 Bit DSA Key. RSA is very old and popular asymmetric encryption algorithm. It is used most of the systems by default. There are some alternatives to RSA like DSA. We can not generate 4096 bit DSA keys because it algorithm do not supports. Generate 2048 Bit Key. The default key size for the ssh-keygen is 2048 bit. We can also specify explicitly the size of the key like.

Click OK.

Repeat for all remaining devices/servers or specify any outside IPs which are static that require remote access.

WARNING: If your firewall has 0.0.0.0 'any' enabled by default, make sure you save your changes by adding your static IP first before deleting the 'any' entry. Otherwise, your session will disconnect.

Mar 28, 2019  DKIM is in theory quite simple. It relies on asymmetric encryption and therefore works with any tool developed for such a use. First one has to generate a private/public key pair. Then the public part of the key has to be put as a TXT record to the domain which is used as the sender address. Under DKIM, click Enable. Currently, HostGator fully supports the DKIM outgoing authentication specification. Users with Windows shared hosting plans should contact us via phone or Live Chat with the domain name(s) that DKIM should be applied to. Users with dedicated servers may enable DKIM as follows: Windows Dedicated Server - MailEnable. DKIM & SPF records are important services for ensuring that your domain is not delivered to the spam folders of your recipients or even outright rejected. HostGator currently enables these by default for all cPanel accounts. Third party DNS providers may require you to manually add these DNS records.

You may repeat the last step for hardening access to ASDM as well.

3 Comments

• Sonora
  alexthompson4 Oct 16, 2018 at 06:51pm

  Thank you for the guide! For accessing the ASA through SSH, what devices would you recommend connecting from (a server, etc) from a security standpoint?

• Ghost Chili
  starg33ker Oct 16, 2018 at 06:56pm

  I only connect to the ASA from our Hyper-V host.

• Sonora
  alexthompson4 Oct 16, 2018 at 07:02pm

  That's a good idea! I shall have to work on implementing it at my workplace.