Given the speed at which viruses can spread, daily (or more frequent) pattern updates are a must.
As the virus attack vector is still mainly via email, you need to rigorously scan all incoming emails at the perimeter (and block all executables via email). We use MailScanner (www.mailscanner.info) on a Linux box with ClamAV (www.clamav.net), Bitdefender (www.bitdefender.com), and McAfee's uvscan to scan all emails. Both ClamAV and Bitdefender update their patterns when needed and not to some arbitrary schedule. We check for pattern updates hourly. The advantage of blocking at the perimeter is that when your server or desktop antivirus starts screaming, you know that the infection has come via user action or infected PCs being connected to your internal network. Cheers, Phil ---- Phil Randal Network Engineer Herefordshire Council Hereford, UK > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf > Of Larry Seltzer > Sent: 10 August 2005 18:08 > To: [email protected] > Subject: RE: [Full-disclosure] Antivirus > > >>BitDefender. ... not as expensive as Symantec. Faster updates.. > > That's another point worth making generally: everyone updates > faster than Symantec. Symantec sends out normal updates once > a week and an attack has to be nuclear war for them to go > "out of cycle." > > > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > Hosted and sponsored by Secunia - http://secunia.com/ > _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
