Thanks Roy Any ideas how to code this child process stuff, as I said I am newbie and not from a coding background
to be honest ideally yes, i'd get 50K, but if i can get above 30K that would be OK Alan "Roy Smith" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > In article <[EMAIL PROTECTED]>, > "Alan Wright" <[EMAIL PROTECTED]> wrote: > >> Thanks for the feedback. >> >> Using the socket in a list is great >> >> However, as i imagined, I now get a limit of around 1500 conns before the >> system crashes out, also i have noticed, that the ports loop back to 1025 >> when they hit 5000. >> >> Any ideas on how to make the list/socket get to around 50K > > Yikes. Not on any box I know of. A given process is limited in how many > descriptors it can have open at once. I don't know of any that will allow > anywhere near 50k. Somewhere in the 1-2000 range would be more typical. > The 1500 you report is not at all surprising. > > You might try creating a bunch of child processes with os.system() or > something of that ilk. Create 50 processes and have each one open 1000 > sockets. > > The next thing you have to worry about is whether the OS can handle 50k > file descriptors open per-system. Or 50k sockets, or TCP connections. I > wouldn't be too surprised if many systems couldn't. The address space > (TCP > port numbers) is 16-bit (unsigned), or about 65k, but you may well run > into > some other system limit long before you exhaust the theoretically > available > ports. > > Something like Scapy, recommended by others, may indeed be able to > generate > all those SYN packets you want, but that doesn't mean you'll get all the > open connections you seek. You send a SYN packet to the remote host, and > it sends back a SYN/ACK. The local kernel now sees a SYN/ACK packet for a > port it doesn't know about. I'm not sure what the RFCs say about that, > but > I wouldn't be surprised if the kernel ends up sending a RST or maybe a FIN > or something like that. The kernel owns the ports; it's not nice to try > and mess with them on your own. -- http://mail.python.org/mailman/listinfo/python-list
