john <john@no.spam> wrote: > I am using Linux. Is there any way to change "Time To Live" (TTL) in > Linux network connection (Ethernet connection to an ADSL router)? The ADSL router - you mean as in one of those home router devices with the NAT functionality? Someone else has addressed setting what linux puts in the TTL, but you may need to make sure that the "router" in doing NAT doesn't also re-write the IP TTL. Not sure that it would, but it would be something to check. rick jones -- The glass is neither half-empty nor half-full. The glass has a leak. The real question is "Can it be patched?" these opinions are mine, all mine; HP might not want them anyway... :) feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

Andy Ruddock <andy.ruddock+news@gmail.com> wrote: > Rick Jones wrote: > > john <john@no.spam> wrote: > >> I am using Linux. Is there any way to change "Time To Live" (TTL) in > >> Linux network connection (Ethernet connection to an ADSL router)? > > > > The ADSL router - you mean as in one of those home router devices with > > the NAT functionality? Someone else has addressed setting what linux > > puts in the TTL, but you may need to make sure that the "router" in > > doing NAT doesn't also re-write the IP TTL. Not sure that it would, > > but it would be something to check. > > > > rick jones > If it were to do that wouldn't it break stuff like traceroute? Frankly I wouldn't put much of _anything_ past a NAT but then I've never really liked NATs, only grudgingly accepted them until such time as my home ISP will start offering v6 :) Your point is valid though. rick jones seems that earthlink used to offer a v6 service to folks via a tunnel, anyone not just earthlink customers, but I didn't learn about it until recently and I think it's gone away... if it were still around I might be tempted to flash my wrt54g. -- denial, anger, bargaining, depression, acceptance, rebirth... where do you want to be today? these opinions are mine, all mine; HP might not want them anyway... :) feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

On Thu, 15 Nov 2007 21:21:13 -0800 (PST), irbnsn@gmail.com <irbnsn@gmail.com> wrote: | Some ISPs look at the TTL (time to live) value to try to detect | routers. A Windows machine will use an initial TTL of 128. The | router will dec this by one, so if the ISP sees a TTL of 127, they | know to check the packet traffic for other evidence of an internal | network. Some ISP want to charge for every computer on the internal | network. Some of us think we are paying for bandwidth and the | internal network is none of the ISP's business. Worse trick I heard was to set the TTL to 0 (or 1 or 2, as appropriate) on packets just before passing them to your modem. Just enough to get to a PC, but a router/NAT box would drop them before passing them on to a local network. -- Reverend Paul Colquhoun, ULC. http://andor.dropbear.id.au/~paulcol Asking for technical help in newsgroups? Read this first: http://catb.org/~esr/faqs/smart-questions.html#intro