https://community.cisco.com/t5/network-security/rv345-ddos-attack/m-p/4459782#M1083329 <P>Hi <a href="https://community.cisco.com/t5/user/viewprofilepage/user-id/1221904">@YOUNGDONGLEE8988</a>,</P><P>You can't really. Assuming this was the volumetric attack, by the time malicious traffic reached your device, your uplink was already filled. Your upstream provider should protect you from DDoS attack, or you need to go for dedicated DDoS solution.</P><P>Best thing you can do on your devices is to keep up to date software on them, which are fixing known security issues, so you won't get affected with non-volumetric attacks.</P><P>BR,</P><P>Milos</P> Sat, 04 Sep 2021 05:49:16 GMT Milos_Jovanovic 2021-09-04T05:49:16Z https://community.cisco.com/t5/network-security/rv345-ddos-attack/m-p/4459548#M1083319 <P>I have four RV345 routers.&nbsp;</P><P>It seems that only certain routers are attacked by DDoS.<BR />Please refer to the attached log file.<BR />how to prevent DDoS attack? on router</P><P>Thank you</P> Fri, 03 Sep 2021 16:06:47 GMT https://community.cisco.com/t5/network-security/rv345-ddos-attack/m-p/4459548#M1083319 YOUNGDONGLEE8988 2021-09-03T16:06:47Z https://community.cisco.com/t5/network-security/rv345-ddos-attack/m-p/4459782#M1083329 <P>Hi <a href="https://community.cisco.com/t5/user/viewprofilepage/user-id/1221904">@YOUNGDONGLEE8988</a>,</P><P>You can't really. Assuming this was the volumetric attack, by the time malicious traffic reached your device, your uplink was already filled. Your upstream provider should protect you from DDoS attack, or you need to go for dedicated DDoS solution.</P><P>Best thing you can do on your devices is to keep up to date software on them, which are fixing known security issues, so you won't get affected with non-volumetric attacks.</P><P>BR,</P><P>Milos</P> Sat, 04 Sep 2021 05:49:16 GMT https://community.cisco.com/t5/network-security/rv345-ddos-attack/m-p/4459782#M1083329 Milos_Jovanovic 2021-09-04T05:49:16Z