URL: <http://gna.org/bugs/?18530>
Summary: Client-spawned server should not listen on all network interfaces Project: Freeciv Submitted by: jtn Submitted on: Sat Aug 20 23:34:23 2011 Category: client Severity: 3 - Normal Priority: 5 - Normal Status: None Assigned to: None Originator Email: Open/Closed: Open Release: 2.3.0 Discussion Lock: Any Operating System: Any Planned Release: 2.4.0 _______________________________________________________ Details: As noted in Debian bug #578068 <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=578068>, in this day and age, a single-player game shouldn't by default cause a listening port to be opened on a machine's public network interfaces. Probably many people are saved by being behind NAT, but if/when IPv6 actually happens it may become more of an issue. Not to mention, say, netbooks on public Wi-Fi networks without firewalls. Best would be to use something like Unix domain sockets as suggested in the Debian bug -- done right, this would keep servers on multiuser machines safe from other users -- but that's a lot of work and we'd need another solution for Windows. Staying with TCP but binding to the localhost interface seems like a "good enough" solution that will work for all the platforms we support. It feels like this should be as simple as specifying a "--bind" argument to the spawned server. However, it's just the kind of change that will expose some platform-dependent networking issue and embarrassingly break single-player mode for someone. So I'm wary of trying to fix it in 2.3.x. There are some users who use the client-spawned server as a LAN server (e.g., in this forum thread <http://forum.freeciv.org/viewtopic.php?t=7009>, and one other I can't find now). This change will break that usage pattern. It's not something we'd recommend anyway -- if the relevant client dies, it'll take down the server -- but we might nevertheless want to consider an option to choose the bound interface for client-spawned servers. _______________________________________________________ Reply to this item at: <http://gna.org/bugs/?18530> _______________________________________________ Message sent via/by Gna! http://gna.org/ _______________________________________________ Freeciv-dev mailing list Freeciv-dev@gna.org https://mail.gna.org/listinfo/freeciv-dev