Security Basics mailing list archives
RE: what should I do when....
From: "Sergio Castro" <sergio.castro () unicin net>
Date: Mon, 7 Jul 2008 13:03:51 -0500
If your ports are properly stealthed, and you have scanned your systems and have no vulnerabilities, you have little to fear from scans. Now, if your ISP pays attention to you and fights for you and does something about all those scans coming from China, good for you. You have a really good ISP. Regards, Sergio -----Mensaje original----- De: Rivest, Philippe [mailto:PRivest () transforce ca] Enviado el: Lunes, 07 de Julio de 2008 12:53 p.m. Para: Sergio Castro; Jorge L. Vazquez; security-basics; security-basics-sc.1207759308.halobnafecliebdpegpn-Jlvazquez825=gmail.com@se curityfocus.com; security focus listbounce Asunto: RE: what should I do when.... This is not a good practice. If you just tolerate brute forcing and scanning you are on the wrong track. Imagine if the network usage would double or triple because of these behavior. When will you start to report this to your ISP? When will you start to pressure them that they have clients that need & WANT a secure service (ISP)? As I stated, you should follow your internal procedure, hardened you device after your investigation (&before also..) and contact your ISP. When you have a contract with your ISP you should have a contact for *emergency*. Contact him or normal enterprise service level and have them take a look at the situation. Not doing anything is just accepting that you can be probe and that's not very wise. **Also note that if the guy whos probing you knows nobody ever contacts the ISP for investigation.. do you really think his gonna do nice and limited (rate) scans? His gonna pop everything he has against you to do a full & extensive & complet scan. Merci / Thanks Philippe Rivest, CEH Vérificateur interne en sécurité de l'information Courriel: Privest () transforce ca Téléphone: (514) 331-4417 www.transforce.ca Vous pourriez imprimer ce courriel, mais faire pousser un arbre c'est long. You could print this email, but it does takes a long time to grow trees. -----Message d'origine----- De : listbounce () securityfocus com [mailto:listbounce () securityfocus com] De la part de Sergio Castro Envoyé : 4 juillet 2008 19:51 À : 'Jorge L. Vazquez'; 'security-basics'; security-basics-sc.1207759308.halobnafecliebdpegpn-Jlvazquez825=gmail.com@se c urityfocus.com; 'security focus listbounce' Objet : RE: what should I do when.... Hi Jorge, My recommendation, other than make sure your public IP systems are properly hardened, is to do nothing. Continuous scans and brute force login attempts are the norm on the Internet. For every ISP that pays attention to your complaints, 10 will ignore you. - Sergio -----Mensaje original----- De: listbounce () securityfocus com [mailto:listbounce () securityfocus com] En nombre de Jorge L. Vazquez Enviado el: Jueves, 03 de Julio de 2008 09:05 p.m. Para: security-basics; security-basics-sc.1207759308.halobnafecliebdpegpn-Jlvazquez825=gmail.com@se curityfocus.com; security focus listbounce Asunto: what should I do when.... for the last 2 days I've been getting lots of connections attempts on my firewall logs(ipcop firewall), from a specific ip based in Canada, the log is showing a * * NEW not SYN? it seems that someone is trying to initiate a connections, or may be a scan. Although the good thing is that the firewall is detecting them therefore stopping them, I'm getting worried of hacker activity, I've already done ip lookup, and dns whois query both of those point to ip and host in Canada it seems to be a company as I got their public website and also private network.....could anyone advice me what's the proper course of actions in this case?.... thanks Jorge L. Vazquez www.pctechtips.org __________ NOD32 3243 (20080704) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com __________ NOD32 3244 (20080705) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com
Current thread:
- what should I do when.... Jorge L. Vazquez (Jul 04)
- RE: what should I do when.... Rivest, Philippe (Jul 04)
- RE: what should I do when.... Sergio Castro (Jul 07)
- RE: what should I do when.... Rivest, Philippe (Jul 07)
- RE: what should I do when.... Sergio Castro (Jul 07)
- Message not available
- RE: what should I do when.... Sergio Castro (Jul 08)
- RE: what should I do when.... Weir, Jason (Jul 09)
- Re: what should I do when.... Ansgar -59cobalt- Wiechers (Jul 09)
- Re: what should I do when.... Adriel Desautels (Jul 10)
- Re: what should I do when.... Ansgar -59cobalt- Wiechers (Jul 10)
- Re: what should I do when.... Adriel Desautels (Jul 11)
- Re: what should I do when.... Ansgar -59cobalt- Wiechers (Jul 11)
- RE: what should I do when.... Rivest, Philippe (Jul 11)
- Re: what should I do when.... Adriel Desautels (Jul 11)
- RE: what should I do when.... William Mohney (Jul 11)
- RE: what should I do when.... Rivest, Philippe (Jul 07)