topic ASDM will not open in Network Security https://community.cisco.com/t5/network-security/asdm-will-not-open/m-p/3922681#M925074 <P>I recently installed ASDM to configure a new ASA5525, when I launch the tool i get an error saying it can't connect. Looking at the Java logs I see this entry every time I try to connect:</P><P>&nbsp;</P><P>javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure</P><P>&nbsp;</P><P>I've changed Java version to match a co-worker who can launch the tool with no issues.</P><P>&nbsp;</P><P>What else do I need to change to get this working?</P> Fri, 21 Feb 2020 17:29:17 GMT Joe Della Valle 2020-02-21T17:29:17Z ASDM will not open https://community.cisco.com/t5/network-security/asdm-will-not-open/m-p/3922681#M925074 <P>I recently installed ASDM to configure a new ASA5525, when I launch the tool i get an error saying it can't connect. Looking at the Java logs I see this entry every time I try to connect:</P><P>&nbsp;</P><P>javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure</P><P>&nbsp;</P><P>I've changed Java version to match a co-worker who can launch the tool with no issues.</P><P>&nbsp;</P><P>What else do I need to change to get this working?</P> Fri, 21 Feb 2020 17:29:17 GMT https://community.cisco.com/t5/network-security/asdm-will-not-open/m-p/3922681#M925074 Joe Della Valle 2020-02-21T17:29:17Z Re: ASDM will not open https://community.cisco.com/t5/network-security/asdm-will-not-open/m-p/3922689#M925081 <P><SPAN>&nbsp;fix is to uncheck the "Use SSL 2.0 compatible ClientHello format" in Advanced tab of the Java Control Panel (At the bottom).</SPAN></P><P>&nbsp;</P><P><SPAN>This worked for me.....</SPAN></P> Wed, 11 Sep 2019 16:52:12 GMT https://community.cisco.com/t5/network-security/asdm-will-not-open/m-p/3922689#M925081 Joe Della Valle 2019-09-11T16:52:12Z Re: ASDM will not open https://community.cisco.com/t5/network-security/asdm-will-not-open/m-p/4419426#M1081600 <P>Thank you . Your solution fixed our issue</P> Thu, 17 Jun 2021 05:25:52 GMT https://community.cisco.com/t5/network-security/asdm-will-not-open/m-p/4419426#M1081600 helpdeskepso 2021-06-17T05:25:52Z