Network Attacks Help

I use Avast Prof on my notebook which is connected to a LAN at my workplace. The network shield of Avast is regularly reporting of the following attacks:

22.03.2005 18:44:20 DCOM Exploit attack
from 192.168.2.63:135
22.03.2005 18:44:48 LSASS Exploit (SXP) attack
from 192.168.2.63:445
22.03.2005 18:45:53 LSASS Exploit (SXP) attack
from 192.168.2.136:445

What do these attacks mean? How can I prevent them from happening?

Regards,
Abhishek

 

I ran a search on the ip in the alert and this is what it shows. it doesn't look to nafarious.


Checking access for 24.117.168.208... ok.
Final results obtained from whois.arin.net.
Results:

OrgName: Internet Assigned Numbers Authority
OrgID: IANA
Address: 4676 Admiralty Way, Suite 330
City: Marina del Rey
StateProv: CA
PostalCode: 90292-6695
Country: US

NetRange: 192.168.0.0 - 192.168.255.255
CIDR: 192.168.0.0/16
NetName: IANA-CBLK1
NetHandle: NET-192-168-0-0-1
Parent: NET-192-0-0-0-0
NetType: IANA Special Use
NameServer: BLACKHOLE-1.IANA.ORG
NameServer: BLACKHOLE-2.IANA.ORG
Comment: This block is reserved for special purposes.
Comment: Please see RFC 1918 for additional information.
Comment:
RegDate: 1994-03-15
Updated: 2002-09-16

OrgAbuseHandle: IANA-IP-ARIN
OrgAbuseName: Internet Corporation for Assigned Names and Number
OrgAbusePhone: +1-310-301-5820
OrgAbuseEmail: abuse@iana.org

OrgTechHandle: IANA-IP-ARIN
OrgTechName: Internet Corporation for Assigned Names and Number
OrgTechPhone: +1-310-301-5820
OrgTechEmail: abuse@iana.org

# ARIN WHOIS database, last updated 2005-03-21 19:10
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