Date: Fri, 8 Feb 2002 17:00:10 -0500 (EST) From: Joe Clarke <marcus@marcuscom.com> To: All Mail <lists@jeff.ath.cx> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: Packet loss to localhost? Message-ID: <20020208165824.V67438-100000@shumai.marcuscom.com> In-Reply-To: <Pine.BSF.4.43.0202081641580.35930-100000@jeff.ath.cx>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, 8 Feb 2002, All Mail wrote: > Hello, > > I've noticed this problem since upgrading to 4.5. > > # ping -f localhost > PING localhost (127.0.0.1): 56 data bytes > .............................................................................. > .............................................................................. > .............................................................................. > .............................................................................. > .............................................................................. > .............................................................................. > .............................................................................. > .............................................................................. > .............................................................................. > ....................................^C > --- localhost ping statistics --- > 3738 packets transmitted, 3000 packets received, 19% packet loss > round-trip min/avg/max/stddev = 0.008/0.013/0.399/0.024 ms > > It doesn't seem to matter how big the packets are either. Anyone know > what might cause this packet loss? tail /var/log/messages, and I'll bet you see something like: Feb 8 16:57:56 nms-server2 /kernel: Limiting icmp ping response from 249 to 200 packets per second This is a nice little feature that makes FreeBSD less-susceptible to ICMP attacks. The kernel option options ICMP_BANDLIM Controls this, and the sysctl variable net.inet.icmp.icmplim lets you tune the throttle rate. Joe > > Jeff > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020208165824.V67438-100000>