Messages in this thread |  | | | From | Kyle Moffett <> | | Subject | [OT] Re: BUG: Unusual TCP Connect() results. | | Date | Thu, 9 Jun 2005 22:23:31 -0400 |
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On Jun 9, 2005, at 16:51:39, Alastair Poole wrote: > The number of ports listed changes in size and they appear to be > random. For example, on one scan ports
> 22, 3455, 4532 and 6236
SSH and 3 RPC-based services, I would guess. This is not a kernel bug, there are probably userspace applications which are opening those ports, even something as simple as an FTP client in active mode would do it. Please run "netstat -lp" to determine which processes have opened each port.
> It is also interesting to note that a basic TCP nmap scan does not > return these unusual results.
nmap doesn't scan higher-numbered ports by default, because those ports are generally allocated dynamically by the kernel when user programs indicate they do not care what port they are bound on.
Cheers, Kyle Moffett - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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