HTTPS Delay Over VLAN

Question

There is 30 seconds delay when i send an HTTPS request from "PC1" to "PC2", "PC2" located in an other "VLAN", This "VLAN" is configured using a Cisco router. i found that the date and time of the "PC1" and "PC2" not synced. once i configured the same date and time over these 2 PCs, the delay disappeared. when "PC1" and "PC2" were on the same network i didn't faced this problem.

Any advice.

Severs Date and Time

Answer 1

the problem was with the UDP port 137,it was closed where the self signed certificate has a host name and use this port to resolve this host name.