I recently started noticing the following errors in my proxy server logs
after a change of cipher ordering on one of my upstream server.

Here are the errors,

ssl_support.c:158 ssl[16812] ERR (51:accept:[xxx.xxx.xxx.xxx]:49044:443):
OpenSSL Error 336130177 in s3_pkt.c:410 is 'error:1408F081:SSL
routines:SSL3_GET_RECORD:block cipher pad is wrong


ssl_support.c:158 ssl[16814] ERR (84:accept:[xxx.xxx.xxx.xxx]:58615:443):
OpenSSL Error 336150774 in s3_pkt.c:1270 is 'error:140940F6:SSL
routines:SSL3_READ_BYTES:unknown alert type


There are bunch of them, both proxy and upstream has the same version of
openssl

 OpenSSL 1.0.1 14 Mar 2012


Cipher ordering on proxy node is RC4:HIGH:!aNULL:!MD5

While on the upstream its
HIGH:!RC4:!MD5:!aNULL:!EDH:!EXP:+ECDHE-RSA-AES128-SHA256:+3DES


With Server Preference Enabled.

It will be great if you can help with this debugging, not sure what
triggers these errors


--David

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