On Sun, 2003-08-17 at 17:28, Wolfgang Bornath wrote: > *** Carroll Grigsby Sun, 17 Aug 2003 20:05:31 -0400 : > > > On Sunday 17 August 2003 07:47 pm, Wolfgang Bornath wrote: > > > *** Dave Sherman Sun, 17 Aug 2003 18:40:31 -0500 : > > > > Well, the worm is known to scan on ports 135 and 445. Can't say > > > > about the others... > > > > > > Thanks Dave and James. Just what I thought. I must say, that this > > > 'el cheapo' router seems to have a pretty good default setup. I can > > > do everything (web, mail, ftp, news), the router fetches time sigs > > > from a timeserver and the default setup barrs all those attacks > > > without slowing down my wireless LAN. > > > > > > wobo > > > > Wobo: > > Errr... just in case someone else wanted to get one of these marvelous > > routers, what should they look for? > > It's a cheap Pheenet WBIG-104b+ > Router with 1 WAN, 4 LAN (100/10 switch), 22Mbps WLAN. 802.11b+ > Supports MAC + port filtering, WEP up to 256bit > > Nice webbased setup (for dummies!), as I already mentioned a nice > default setup firewall and lots of options to mess up the whole scheme! > > Only thing I'll have to look for is the signal strength (power?). I'm > just 4 meters away with my laptop but I only have 82% signal strength > according to the small task bar applet. > > When I put the AP on the balcony (in first floor) and move out on the > street the connection breaks down when I'm just about 10m away. > > On the box it says: Transmit Output Power 17dbm (whatever that means), > looks like that is the power of the transmitter to the laptop card. > > On the card's box I don't find any references to that, it's a Belkin > F5D6020 v. 2100 which runs fine under Mandrake with the pcmf502rd > module. > > wobo
Wobo, A lot also depends on the receiver, which is why built in wireless works so much better than the pcmcia (They use the entire lid of a laptop as the antenna rather than that little nub that sticks out). In fact I've observed that a higher quality receiver will solve more problems than a higher quality transmitter. The other thing is that since it operates in the low end microwave band it's ability to penetrate solid objects (like walls) is real lousy. Play with the antenna a bit (it does help) and also look at where you sit in relation to the box itself (you make a great absorption obstacle just yourself. Even your hands can affect the signal strength.) Also think about switching away from channel 6. 1,6 and 11 are the only ones 100% free of overlap and if there are a lot of people on 6 (the default) then the noise level can shoot to the moon. Note also, what a lot of software calls signal strength is actually signal quality. (82% out of 90 for example) this is a function of S/N ratio and packet resend. So in theory it would be impossible to ever get 90 out of 90. 82% is really pretty good. Last thing I've found is that the single rate (not the double rate) will travel better (in meters) in that the amount of dropped packets will be less so it spends less time resending. Although this drops data rate in total data sent the effective rate (how fast the web page loads for example) will feel faster since more usable data gets to you sooner. james
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