[Dxspider-support] Hamclock connections

[Mike McCarthy, W1NR]

Consumer firewall/routers running NAT will sometimes expire or otherwise 
lose NAT connection mapping if no traffic is seen in short periods of 
time. If filtering is heavy that no spots flow for a while, maybe that 
is the reason?

W1NR

On 3/2/2023 2:01 PM, Dirk Koopman via Dxspider-support wrote:
> I am struggling to  understand why HamClock requires a "keepalive" 
> timer. It's a TCP based connection that will have ICMP turned on (unlike 
> certain TCP connections in day$ job). This means that he *will* get 
> notified if his connection goes away ("connection reset by peer"). But, 
> in any event, if there is no output for a user for more than 11 minutes 
> (extremely tight filtering perhaps), the he will get a prompt.
> 
> But, getting traffic - by itself - *should* reset his "keepalive" timer.