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Apr
19
revised New office cabling: should we use CAT7 or CAT6a?
added 156 characters in body
Apr
19
answered New office cabling: should we use CAT7 or CAT6a?
Apr
14
comment Recursively delete empty folders with verbose output
I worry about the logic of this -- is a directory empty if it only contains directories that are empty? Also -- as far as logging the output -- whenever I do something like this that has the potential to wreck a whole bunch of stuff, I have it output the command it would run but not actually run the command itself. Then, if I actually want to run those commands I can just run the output like a shell script.
Apr
7
comment Anycast DNS — how do you deal with TCP DNS requests?
Which OSPF implementations offer per-flow ECMP instead of a per-packet ECMP? In a perfect world I'd just get the ECMP to chose a path based on a hash of (source IP / source port).
Apr
5
comment Something is burning in the server room; how can I quickly identify what it is?
+1 for the buddy system. I think it's a little nuts that there are DCs out there that use the EPO to also dump fire suppression as well. There are plenty of situations where you'd want to EPO without wanting to dump halotron all over the guy getting electrocuted. An EPO is a serious deal but isn't a "destroy everything in the DC kinda deal" or at least shouldn't be. The guys in the DC should hopefully understand the big red button and the fire suppression system well enough to weigh the effect of hitting the button. An EPO may actually stop a fire and save the DC, for instance.
Apr
4
awarded  Enlightened
Apr
3
awarded  Nice Answer
Apr
3
revised Why is Clonezilla faster than dd?
cleaned up formating / punctuation / clarified "empty space on source drive"
Apr
3
answered Why is Clonezilla faster than dd?
Apr
3
accepted Anycast DNS — how do you deal with TCP DNS requests?
Apr
3
comment Anycast DNS — how do you deal with TCP DNS requests?
Ah, so the connection tracking is the key -- people.netfilter.org/pablo/docs/login.pdf -- each node runs a firewall that knows the state of each other firewall and forwards traffic to the proper firewall if it happens to receive traffic "for my ip but not for me".
Apr
3
comment ZFS / ZFS send for database replication
Let's assume linux and/or freebsd.
Apr
3
asked ZFS / ZFS send for database replication
Apr
3
asked Anycast DNS — how do you deal with TCP DNS requests?
Nov
27
comment Cisco IOS router config — how to disable SSH / SNMP on all but loopback address?
That seems really tidy. Thanks!
Nov
21
comment Cisco IOS router config — how to disable SSH / SNMP on all but loopback address?
So this means the NMS would be able to SNMP walk / ssh any of the IPs on the router?
Nov
21
asked Cisco IOS router config — how to disable SSH / SNMP on all but loopback address?
Oct
31
awarded  Nice Answer
Oct
18
comment Zabbix not getting data for one filesystem
What is in the agent log? 1.x or 2.x? Active or passive check?
Sep
5
awarded  Notable Question