Incremental Sync between Inn Servers

[Zhenyu Xia]

Hi all,

Is there any method can synchronize articles between two NNTP servers 
incrementally?
1. Using Innfeed command through Channel mode, is it correct?
   1.1 Does "Channel mode" supply incremental sync?
   1.2 If "Channel mode" doesn't supply incremental sync, we need to use 
Funnel-file mode to sync remote NNTP server, right? Is there document 
introduce the format information of funnel file?
   1.3 Or we need to use nntpsend to sync specific article, and control 
incremental sync by ourself.

2. I noticed that there is some tools can bridge NNTP news to RSS, is 
there any native component inside inn can support that feature. You know 
some times people usually behind firewall, http request is the most 
popular way to access news server.
Thanks&Regards
Ryan