“ppp = 2.4.4 is needed by pptpd-1.3.4-2.rhel5.x86_64”或者“ppp = 2.4.4 is needed by pptpd-1.3.4-2.rhel5.x86”
ppp 2.4.4——————>pptpd 1.3.4 ppp 2.4.5——————>pptpd 1.4.0