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September 26th, 2004, 03:51 PM
Okay, there's 3Com Network Inspector running on one of the machines in the 18.104.22.168 Network, that every 12 hours discovers/updates the entire network diagram. For the 172.16.0.0/16 Net, it pings...
September 25th, 2004, 02:29 PM
And the number of actuals hosts on that is less than 400.. yup, 400 out of 65,534. Of course, there's also the other security issue of using routable, non-private addresses such as...
September 25th, 2004, 08:07 AM
I've setup MRTG on a W2k box, and it was pretty straightforward, except for the lack of RRDTool [for database] support as provided in Linux. Don't think it'd be any different in WinXP. However,...
September 25th, 2004, 06:36 AM
- back -
Sorry, I couldn't get back to this thread earlier. Needed to give some attention to my academics over the end of the week.
Regarding the router flooding, its not doing that regularly,...
September 22nd, 2004, 07:16 AM
Only have RIPv1 running on the router. Regarding updating its arp tables, it wouldn't go about polling every ip on that net for an arp response would it? I would've thought building the Mac/port...
September 21st, 2004, 10:07 PM
Well, I used Ethereal to capture traffic, and the router was broadcasting ARP requests incrementally for the entire Network like
Who has 172.16.131.1 tell 172.16.0.253
Who has 172.16.131.2 tell...
September 21st, 2004, 09:37 PM
I have a Cisco Cat3550 router, and 5 subnets, one of which is a rather large 172.16.0.0/16 subnet. Of late, I've seen this backbone router sending out ARP floods on this 65,000+ hosts...
August 3rd, 2004, 12:55 AM
I think you might be right about that Thread_killer. Anyways, so I telnetted to the switch, and removed all ports.. yes, all ports from VLAN 1. *Poof*, connection gone. Can't...
August 2nd, 2004, 02:12 PM
My question is about .. obviously.. vlans.
I have a 3Com 3300 Switch with Vlan support. I added the first 6 ports to one vlan [ID:190], the other 6 to another vlan[ID:191]. Didn't...
Yup, all the clients are masked with 255.255.0.0. And its all just one happy 65,000+ possible IPs subnet, with around 700 IPs actually in use. As for the third question, yup, we do use...
Regarding the network congestion due to the sassers worm, I've a question:
Sasser spreads by scanning for machines in its own network, rite? This causes ARP broadcast storms,...
Sorry, I hadn't seen this thread earlier. Wouldn't have started a somewhat similar thread
Another question regarding the sasser worm. It generates a good amount of network traffice by trying to...
Regarding the Sassers worm, many of the machines on the college network were hit, and kept crashing/rebooting with the Error Msg along the lines of ... has exprienced errors with the...
December 30th, 2003, 08:43 AM
Answering me own query earlier:
Assigning more than one IP address to a single interface such as eth0 on linux can be done as follows:
> ifconfig eth0:1 192.168.x.1 up
> ifconfig eth0:2 ...
December 30th, 2003, 06:01 AM
Apologies for not getting back to this thread earlier. The Saturday earthquake had knocked out some of the uplink lines. Thanks a lot for your responses everyone, am very grateful.
December 25th, 2003, 03:36 AM
Sorry I couldn't get back to this thread earlier. The end of the week can be wicked. [Thursday and Friday are the weekend here].
Thanx for the marvellous info Maestro, Ammo and Fyremouse. In a bid...
December 23rd, 2003, 09:52 PM
Okay, given that this topic is shifting from network management (IP mngmnt) to security [no surprises there given the nature of the site ;) ], I think cgkanchi and ammo did really open a can of...
December 23rd, 2003, 03:56 PM
The number of nodes doesn't exceed a thousand and the routers a Layer 3 Cisco Cat 3550 switch, [which I believe is a pretty good workhorse], so I definitly gonna look more into this ACL scenario....
December 23rd, 2003, 02:35 PM
Hi Sonic - I think you misunderstood me a bit. The present DHCP setup we have is exactly what u suggested. The server has a record of all legal MAC addresses and corresponding IPs, and any outsider...
December 23rd, 2003, 10:02 AM
Newbie Question time:
In my college, we run a DHCP server which maps users MAC addresses to IPs - in other words, the whole setup keeps allocated IPs static - the machine always gets the same IP,...
December 21st, 2003, 07:43 AM
WOOOHOOO!!! Thanx a lot !
December 20th, 2003, 07:53 PM
Thanx a lot rcgreen, the post was just the thing I needed...worked just fine! Now, another question.. how did you find that post? Had read it earlier someplace, or googled for it? I'd tried googling...
December 20th, 2003, 01:53 PM
I wanted to use minicom for terminal emulation to connect to a switch over the console port..., the same way I'd do it using hyperterminal under Windows. However, I can't get it to...
October 25th, 2003, 09:32 PM
www.netcraft.com is a nifty thing to know whats a site's servers are upto...
Ok, what exactly is blackcode about? Its blocked by the...
October 25th, 2003, 08:56 PM
One of the graduate students relocated his computer from one lab to another over this weekend and came across a new (new to me at least.. ) connectivity problem. The connection is enabled, but can't...