Security flaw? Azure ignores default encryption.

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eastavin
Posts: 42
Joined: Tue Jan 19, 2016 7:13 pm

Security flaw? Azure ignores default encryption.

Post by eastavin » Fri Jan 22, 2016 4:22 pm

After examining the log files at the end of an AZURE session I see that the encryption algorithm I have set in my VPN server is being ignored by Azure. The Ver 4.19 Build 9599 log reports:

2016-01-22 10:15:27.950 SSL communication for connection "CID-7-xxxxxx" has been started. The encryption algorithm name is "RC4-MD5".
2016-01-22 10:15:28.747 SSTP PPP Session [xxxx]: A new PPP session (Upper protocol: SSTP) is started. IP Address of PPP Client: xxxxxx (Hostname: "xxxxxxx"), Port Number of PPP Client: 49315, IP Address of PPP Server: xxxxxxx, Port Number of PPP Server: 1332, Client Software Name: "Microsoft SSTP VPN Client", IPv4 TCP MSS (Max Segment Size): 0 bytes

My server is set to use encryption of DHE-RSA-AES type. Am I missing something in the settings or is rc4-md5 the only algorithm Azure supports?

cedar
Site Admin
Posts: 2274
Joined: Sat Mar 09, 2013 5:37 am

Re: Security flaw? Azure ignores default encryption.

Post by cedar » Wed Feb 10, 2016 10:34 pm

Yes.
VPN Azure don't use your listening socket.
Your VPN server connect to the repeater system on the cloud with RC4-MD5.

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