[CS-FSLUG] Wireless, smb and Windows
Stephen J. McCracken
smccracken at hcjb.org.ec
Tue Nov 15 21:31:36 CST 2005
Nathan T. wrote:
> After some frustrated experimentation I found out that there was an option
> on the router to block pings from inside the wan, I chose that option and
WAN? Do you mean WAN (Wide Area Network - usually referring to the
Internet) or W-LAN (Wireless Local Area Network)? Are the pings coming
from the Internet or the wireless net?
[snip]
> Port 7 is echo correct?
Yes, but what is using this port?
> What port is used for ping?
None. Ports are only meaningful with TCP and UDP. Ping is ICMP and
ICMP doesn't use ports.
> Would there be any consequences to blocking those ports?
Probably not.
> Any other ports I should consider closing off from the internet?
All of them. Routers usually allow related traffic back in from allowed
outgoing connections. I would block all traffic being initiated from
outside unless I was running a local server (e.g. webserver or such).
The correct question to ask is not "what should I close off?", but "what
should I allow?".
sjm
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