Static IP setup problems

[darkstar]

Hi everyone,

Apologies if this is the wrong forum, but I've just joined up with ADSL24 and although everything is fine, I seem to be having issues now I've changed my router and network devices over to a static IP setup utilising my 8 provided IP addresses.

The problems are twofold. Firstly I seem to be receiving loads of messages on my router now alluding to loads of TCP DOS packets being received. I never used to get these at all. My router is a Netgear DG834GT.

Secondly my wireless radio receiver (a "Logik IRMA1") is also timing out frequently, going into "buffering" mode several times an hour while it plays "catch-up" - but I'm not downloading anything large at the time (my IP profile is 3500kbps). I think the radio problems are coinciding with the DOS "attacks" but I can't be sure.

Is this behaviour to be expected ? Is there anything I can try to alleviate the problems perhaps ? Is it less secure to run a LAN with static IP addresses ?

Unfortunately I need to use static IP addresses as I have two wireless webcams (LinkSys WVC54G) which I can't access via the web remotely without static IP addresses.

Also where can I apply to get more static IP addresses ? It looks like I may need more in the future.

Thanks in advance,

Mick

[James]

We can offer a block of 16 IP's for a one-off £25+vat fee whereas a sinle or block of 8 IP's are free.

When you use a block of 8 IP's on a router, it effecitively does away with NAT (and usually the inbuilt firewall of the router). As all devices have their own WAN static IP address, they are open to more attacks as the are on an external IP and not a local one (eg, 192.168.x.x)

The wireless radio shouldn't have a problem though as in effect when you connect over wireless you'll usually get a local IP (192.168.x.x) unless you can configure it manualy.

How have you got your block of 8 IP's set up? What settings do you have in your router etc?

James

[darkstar]

Hi

Thanks for the quick reply. My router is setup with both NAT and DHCP disabled, and all my network devices (including the wireless radio) have explicitly assigned manual 87...... addresses. The 201 address is set to the router, with 202 and 203 being my main PCs, 204 being the radio, and 205 and 206 being the wireless cameras. I've explicitly set the DNS servers as well.

I did notice that the netmask setting which I've given is 255.255.255.0, which seems to be different from that advised in http://adsl24.co.uk/faq.php#16

I'm convinced the Netgear DG834GT firewall is still operational of course - it's still notifying me of DOS attempts so must be doing something (I used to use www.pcflank.com to test my firewall but this seems to be down so I'm using www.grc.com for now, but I'm trying to find better websites).

Regards
Mick

[James]

The subnet mask should be 255.255.255.248 for a block of 8 IP's - where did the 255.255.255.0 come from?

[darkstar]

I've reset the netmask to 255.255.255.248 on all network devices, so let's see how that goes - I hope it does the trick, certainly with regards to the wireless radio.

It was originally set to 255.255.255.0 so I just left it at that - if there was a Homer Simpson "doh" smiley I would use it now :o

Thanks,
Mick

[James]

Hehe - no problem :)

[mirage]

Not to sure about the fist part of your question,
what I don’t understand is why you are assigning static ip address to your cameras this over complicate things why not just use the one static ip and use port forwarding
to each cam.
For instance cam one, if set at factory default the settings will be 192.168.1.115 set up port forward which is not so hard on the Netgear DG834GT to port 1423 so to access
The cam you would enter http://192.168.1.115:1423 for internal lan and external wan would be your static ip http:// 87.127.???.???:1423
Perhaps the static ips your using to each cam is attracting unwelcome visitors and they are treating the cam as a pc trying to find a open port which of course they wont but the cam unable to defend its self no firewall is getting bombarded with pings dos attacks….

[darkstar]

Thanks - that's a good point about the cams - I'm going to revisit the need for static IP's - I may have jumped in prematurely based on reading about the trouble other Linksys camera users were having over at http://forums.linksys.com - loads of people seemed to be having trouble with port-forwarding and remote camera access. I'll review again.

Anyway my wireless radio doesn't work at all now - it worked for a short while but now doesn't connect at all, after I fiddled with the channels on my router (based on some advice I saw over at http://www.reciva.com. So it's back to square one with the radio :confused: I'll have a look at it all later this week.

Thanks
Mick

[jcoyle187]

I am trying to set this up on my router as well but not having any luck, can anyon help me?

I am on a Netgear WPN824 v1 router if thats any help.