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SSL Cipher Exchange Method when connecting to smtps

AndiB.
Hi,

I'm using a sophos utm 9 with smtp proxy. Things are working great so far. 

I checked the provided ciphers when connecting via port 465.

this was my command:
openssl s_client -cipher 'EECDH+ECDSA+AESGCM EECDH+aRSA+AESGCM EECDH+ECDSA+SHA256 EECDH+aRSA+RC4 EDH+aRSA EECDH RC4 !aNULL !eNULL !LOW !3DES !MD5 !EXP !PSK !SRP !DSS' -connect my.domain:465

This is the cipher, which is used.

>>>
SSL-Session:
    Protocol  : TLSv1
    Cipher    : RC4-SHA


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  • 0
    Andi, I still don't understand WHY you want to do this.  Port 465 access only lets you talk to the SMTP Proxy and there's no PSK involved in an SMTP conversation that I know of.  After STARTTLS, a conversation on port 25 is encrypted.

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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  • 0
    Andi, I still don't understand WHY you want to do this.  Port 465 access only lets you talk to the SMTP Proxy and there's no PSK involved in an SMTP conversation that I know of.  After STARTTLS, a conversation on port 25 is encrypted.

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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