wilsj
asked on
possible scanning, hacking
Seeking some help to see if someone is trying to hack my network or do some kind of scan to see open ports. I have created a capture for asp drops and noticed some weird things. These IP's are from Ontario Canada, China, Hong Kong, US and Bejing. Keep in mind I don't thing anyone should be connecting to us from either of these except the US. I saw similar outputs from an IP in each of these cities/countries so far 5 total. The thing that points out to me is there is only one valid ip address below that is configured on my network. Any advice is appreciated.
1044: 14:21:55.132897 216.254.252.137.3668 > 216.21.41.160.135: S 1132473078:1132473078(0) win 16384 <mss 1460,nop,nop,sackOK>
1045: 14:21:55.139061 216.254.252.137.3669 > 216.21.41.161.135: S 1132516126:1132516126(0) win 16384 <mss 1460,nop,nop,sackOK>
1046: 14:21:55.141640 216.254.252.137.3670 > 216.21.41.162.135: S 1132581203:1132581203(0) win 16384 <mss 1460,nop,nop,sackOK>
1047: 14:21:55.145393 216.254.252.137.3671 > 216.21.41.163.135: S 1132622646:1132622646(0) win 16384 <mss 1460,nop,nop,sackOK>
1048: 14:21:55.154304 216.254.252.137.3672 > 216.21.41.164.135: S 1132658065:1132658065(0) win 16384 <mss 1460,nop,nop,sackOK>
1049: 14:21:55.165122 216.254.252.137.3673 > 216.21.41.165.135: S 1132703273:1132703273(0) win 16384 <mss 1460,nop,nop,sackOK>
1050: 14:21:55.165167 216.254.252.137.3674 > 216.21.41.166.135: S 1132738620:1132738620(0) win 16384 <mss 1460,nop,nop,sackOK>
1051: 14:21:55.172644 216.254.252.137.3675 > 216.21.41.167.135: S 1132790881:1132790881(0) win 16384 <mss 1460,nop,nop,sackOK>
1052: 14:21:55.172690 216.254.252.137.3676 > 216.21.41.168.135: S 1132843933:1132843933(0) win 16384 <mss 1460,nop,nop,sackOK>
1053: 14:21:55.179846 216.254.252.137.3677 > 216.21.41.169.135: S 1132902316:1132902316(0) win 16384 <mss 1460,nop,nop,sackOK>
1054: 14:21:55.182287 216.254.252.137.3678 > 216.21.41.170.135: S 1132949182:1132949182(0) win 16384 <mss 1460,nop,nop,sackOK>
1055: 14:21:55.188222 216.254.252.137.3679 > 216.21.41.171.135: S 1132990645:1132990645(0) win 16384 <mss 1460,nop,nop,sackOK>
1056: 14:21:55.192800 216.254.252.137.3682 > 216.21.41.172.135: S 1133046972:1133046972(0) win 16384 <mss 1460,nop,nop,sackOK>
1057: 14:21:55.196584 216.254.252.137.3683 > 216.21.41.173.135: S 1133100069:1133100069(0) win 16384 <mss 1460,nop,nop,sackOK>
1058: 14:21:55.206562 216.254.252.137.3684 > 216.21.41.174.135: S 1133143838:1133143838(0) win 16384 <mss 1460,nop,nop,sackOK>
1059: 14:21:55.206593 216.254.252.137.3687 > 216.21.41.175.135: S 1133206532:1133206532(0) win 16384 <mss 1460,nop,nop,sackOK>
1044: 14:21:55.132897 216.254.252.137.3668 > 216.21.41.160.135: S 1132473078:1132473078(0) win 16384 <mss 1460,nop,nop,sackOK>
1045: 14:21:55.139061 216.254.252.137.3669 > 216.21.41.161.135: S 1132516126:1132516126(0) win 16384 <mss 1460,nop,nop,sackOK>
1046: 14:21:55.141640 216.254.252.137.3670 > 216.21.41.162.135: S 1132581203:1132581203(0) win 16384 <mss 1460,nop,nop,sackOK>
1047: 14:21:55.145393 216.254.252.137.3671 > 216.21.41.163.135: S 1132622646:1132622646(0) win 16384 <mss 1460,nop,nop,sackOK>
1048: 14:21:55.154304 216.254.252.137.3672 > 216.21.41.164.135: S 1132658065:1132658065(0) win 16384 <mss 1460,nop,nop,sackOK>
1049: 14:21:55.165122 216.254.252.137.3673 > 216.21.41.165.135: S 1132703273:1132703273(0) win 16384 <mss 1460,nop,nop,sackOK>
1050: 14:21:55.165167 216.254.252.137.3674 > 216.21.41.166.135: S 1132738620:1132738620(0) win 16384 <mss 1460,nop,nop,sackOK>
1051: 14:21:55.172644 216.254.252.137.3675 > 216.21.41.167.135: S 1132790881:1132790881(0) win 16384 <mss 1460,nop,nop,sackOK>
1052: 14:21:55.172690 216.254.252.137.3676 > 216.21.41.168.135: S 1132843933:1132843933(0) win 16384 <mss 1460,nop,nop,sackOK>
1053: 14:21:55.179846 216.254.252.137.3677 > 216.21.41.169.135: S 1132902316:1132902316(0) win 16384 <mss 1460,nop,nop,sackOK>
1054: 14:21:55.182287 216.254.252.137.3678 > 216.21.41.170.135: S 1132949182:1132949182(0) win 16384 <mss 1460,nop,nop,sackOK>
1055: 14:21:55.188222 216.254.252.137.3679 > 216.21.41.171.135: S 1132990645:1132990645(0) win 16384 <mss 1460,nop,nop,sackOK>
1056: 14:21:55.192800 216.254.252.137.3682 > 216.21.41.172.135: S 1133046972:1133046972(0) win 16384 <mss 1460,nop,nop,sackOK>
1057: 14:21:55.196584 216.254.252.137.3683 > 216.21.41.173.135: S 1133100069:1133100069(0) win 16384 <mss 1460,nop,nop,sackOK>
1058: 14:21:55.206562 216.254.252.137.3684 > 216.21.41.174.135: S 1133143838:1133143838(0) win 16384 <mss 1460,nop,nop,sackOK>
1059: 14:21:55.206593 216.254.252.137.3687 > 216.21.41.175.135: S 1133206532:1133206532(0) win 16384 <mss 1460,nop,nop,sackOK>
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
I will try configuring the AIP-SSM-10 on monday. My only concern is how much will this slow down processing?
it shouldn't by much as the IPS functions are offloaded to the module. however I'd put it in detection mode first to see what all its alerting about, then after you feel comfortable its detecting the correct stuff, you can start blocking it.
also, this would be a good time to take a baseline performance of your asa. then another after you configure the ips; then compare to see if there is truely a noticeable difference.
also, this would be a good time to take a baseline performance of your asa. then another after you configure the ips; then compare to see if there is truely a noticeable difference.
ASKER
I also have a 2851 ISR with IPS. Should I start with configuring the router IPS first?
whichever you wish to do the IPS functionality.
Make sure your server is secure by downloading a tool that scans your network (most likely the same tool the hackers are using) and prevent them from accessing your server illegally. The program is called Nessus, it can be downloaded here:
http://www.nessus.org/nessus/
It will let you know if you have any port open thats unnecessary. It will also let you know of any vulnerabilites on your server.