Re: [tcpdump-workers] Stopping DHCP request

2005-03-02 Thread John Fastabend
Hi, I'm not sure if I understand the question correctly but to stop a host from recieving DHCP requests you could block them using iptables. Hope that might help somewhate, not sure if it is what you were asking though. . man iptables or a quick google should give you information on how to use

Re: [tcpdump-workers] ICMP header

2005-03-02 Thread Guy Harris
Guy Harris wrote: Not true of the IP header size - the IPv4 header has a *minimum* length of 20 bytes, but if there are IP options, it could be longer than 20 bytes. The first byte of the IP header is the version/length byte; it includes a length, in units of 4-byte words (so that a value of 0x

Re: [tcpdump-workers] ICMP header

2005-03-02 Thread Guy Harris
Ramsurrun Visham wrote: I read that the headers are contiguous, i.e. ethernet first, then IP, and then ICMP. They are 14, 20 and 8 bytes respectively. I also believe that the header size doesn't change. Not true of the IP header size - the IPv4 header has a *minimum* length of 20 bytes, but if the

Re: [tcpdump-workers] standard decoder interface.

2005-03-02 Thread Guy Harris
mwcorley wrote: For the past couple of years or so I've been developing a more standard way to interact with and handle libpcap packets. This has enabled me (and other in the local community) to develop tailored network centric tools much quicker and easier than before. We call it SIMPCAP (Sim

Re: [tcpdump-workers] ICMP header

2005-03-02 Thread Ramsurrun Visham
> On Sun, Feb 27, 2005 at 10:37:34PM +0400, Ramsurrun Visham wrote: > | Hi to all, > | > | I would like to know how do we grab the icmp header from an ethernet frame. > I believe we have to jump pass the ethernet and IP headers.. > > no - we actually need to parse through the IP header to find o

Re: [tcpdump-workers] standard decoder interface.

2005-03-02 Thread [EMAIL PROTECTED]
Greets - I would be interested. Please either send to the list or directly back to me (maybe post it somewhere?). mwcorley wrote: Hello, For the past couple of years or so I've been developing a more standard way to interact with and handle libpcap packets. This has enabled me (and other in the

[tcpdump-workers] standard decoder interface.

2005-03-02 Thread mwcorley
Hello, For the past couple of years or so I've been developing a more standard way to interact with and handle libpcap packets. This has enabled me (and other in the local community) to develop tailored network centric tools much quicker and easier than before. We call it SIMPCAP (Simplified

[tcpdump-workers] Stopping DHCP request

2005-03-02 Thread aman Reddy
Dear All, Is there any common solution for stopping the dhcp request sent by dhcpcd daemon for all Linux operating systems. If anyone knows please update me. with regards, Aman. - Celebrate Yahoo!'s 10th Birthday! Yahoo! Netrospective: 100 Mo