My guess is it only does dns.lookup() function, on a restart/reload...
Hopefully I'm wrong but if i'm right it would not automagically look up the address and notice changes. Aaron West
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On Fri, 21 Aug 2020 at 22:30, Peter Zhao pzhao@paymentus.com wrote:
Hi,
We are trying to use DNS load balance in a stunnel client with round-robin algorithm. service.example.com is mapping to two ips. But when we update DNS to remove one of ips for service.example.com stunnel client still forward requests to both ips. How to make stunnel client to resolve domain name and refresh its cache?
Here is stunnel configuration. sslVersion=TLSv1.2 cert = /etc/stunnel/stunnel.pem output=/var/log/stunnel.log
[service-client] client = yes accept = localhost:4680 connect = service.example.com:4680
[service-server] client = no accept = 10.10.0.16:4680 connect = loclhost:80
Here is the resolving result for service.example.com. ;; ANSWER SECTION: service.example.com. 5 IN A 10.10.0.16 service.example.com. 5 IN A 10.10.0.8
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