I am wondering about the passive DCC feature which is in the new mIRC. Do both sides have to have the passive DCC box checked to use it? How does it work exactly? Does it only work on mIRC or do other clients support it?

Thanks!

Well I have begun to answer my own question using the debug command. It seems only 1 side needs to have it enabled - the side which is sending the file. Both sides do need the newest mIRC obviously.

The dcc privmsg are in the format:
DCC SEND <filename> 4294967295 0 <filesize> incremental_number
4294967295 is 255.255.255.255. 0 is port number 0.
The incremental number is the number of passive DCCs sent by the client so far.
I am still looking into this interesting protocol. Is it documented anywhere?

Quote:

Both sides do need the newest mIRC obviously.

I would think that too, but I sent a file to a friend who is
still using 6.16, with passive dcc enabled and it worked.

Indeed, mIRC has supported passive DCC for quite a while, even there just was no option to actually turn it on for normal (non-firewalled) connections. See for example my post about the passive DCC protocol - this is from before 6.17 was released!

To the OP: it's documented in the helpfile under "DCC Socks5 Protocol". I'm not sure when that page was added to the helpfile.

Thank you for the information