Upgraded OS Now ASDM Won't Work

[mlenco]

Hello

I upgraded the OS on our ASA 5505 from asa917-9-k8.bin to as917-16-k8.bin to mitigate the 200 day bug. All but one ASA upgraded nicely and can be reached by ASDM. This ASA upgraded but I can't connect to it in ASDM. It is the only device with multiple contexts system and notsystem. I have ASDM 7.6.2 on all ASA.

With ASDM open and other devices added I click on the IP address of this ASA just upgraded and it errors out-Device Error: Could Not Open Device <IP ADDRESS>.

[mlenco · Accepted solution]

I found a solultion myself.

https://www.experts-exchange.com/questions/28402483/Can't-get-ASDM-to-load-on-ASA-5505-after-upgrade.html

I issued the following command to get everything working:

ssl encryption aes256-sha1 aes128-sha1 3des-sha1 des-sha1

Looks like for some reason the device didn't have the ssl encryption enabled for the asdm to work.

[Karsten Iwen]

You don't want to enable DES nowadays ... And also 3DES is typically not needed anymore if you don't have to support Windows XP.