1. Openssl 인 경우

cryptographic software needs a source of unpredictable data to work correctly. Many open source operating systems provide a “randomness device” (/dev/urandom or /dev/random) that serves this purpose. All OpenSSL versions try to use /dev/urandom by default; starting with version 0.9.7, OpenSSL also tries /dev/random if /dev/urandom is not available.

참고: https://www.openssl.org/docs/faq.html

2. JVM 설정

2.1 Open the $JAVA_HOME/jre/lib/security/java.security file in a text editor.

2.2 Change the line:
to read:


2.3 Save your change and exit the text editor.


ansible all -m command -a “sed -i ‘s/securerandom.source=file:\/dev\/random/securerandom.source=file:\/dev\/urandom/g’ /usr/java/default/jre/lib/security/java.security”
ansible all -m command -a “sed -n ‘117p’ /usr/java/default/jre/lib/security/java.security”

참고: https://goo.gl/f3XLyN

3. Tomcat 설정

vi /usr/tomcat8/bin/startup.sh

export JAVA_OPTS=” -Djava.security.egd=file:/dev/./urandom”;

참고: https://goo.gl/x1j9xV