I’d start with: Always have a backup system of some kind. Even better if it has a history. Consider single points of failure and how to deal with them should they fail. Depending on the amount of computers involved, looking into some way to make and create a standard image across computers will make everyone’s … Read more
It is possible to do this. At one point it was up in the air a bit until 4592 clarified that it should be supported. Just because it is possible doesn’t mean it is supported by all DNS providers. For example, GoDaddy won’t let you set up a wildcard in a CNAME record. In terms … Read more
There are actually 4 sets of Locally Administered Address Ranges that can be used on your network without fear of conflict, assuming no one else has assigned these on your network: x2-xx-xx-xx-xx-xx x6-xx-xx-xx-xx-xx xA-xx-xx-xx-xx-xx xE-xx-xx-xx-xx-xx Replacing x with any hex value.
Ping packets should use an ICMP type of 8 (echo) or 0 (echo reply), so you could use a capture filter of: icmp and a display filter of: icmp.type == 8 || icmp.type == 0 For HTTP, you can use a capture filter of: tcp port 80 or a display filter of: tcp.port == 80 … Read more
In practice, people who buy from enterprise vendors (HPE, Dell, etc.) do not worry about this. Drives sourced by these vendors are already spread across multiple manufacturers under the same part number. An HP disk under a particular SKU may be HGST or Seagate or Western Digital. Same HP part number, variation on manufacturer, lot … Read more
Please keep in mind that the fail2ban banning of IP is temporary in nature. The best way to have a look at the full list of IPs that have been blocked would be to check the log file: sudo zgrep ‘Ban’ /var/log/fail2ban.log* Edit: this answer previously searched for ‘Ban:’, but even in 2013 the source … Read more
It’s not working because you have ‘svn’ instead of ‘git’ in the rule. All you have to do is to replace the ‘svn’ with ‘git’. <Directorymatch “^/.*/\.git/”> Order ‘deny,allow’ Deny from all </Directorymatch>
The S3 docs used to say: When you delete a bucket, there may be a delay of up to one hour before the bucket name is available for reuse in a new region or by a new bucket owner. If you re-create the bucket in the same region or with the same bucket owner, there … Read more
The whole idea behind the MX record is to specify a host or hosts which can accept mail for a domain. As specified in RFC 1035, the MX record contains a domain name. It must therefore point to a host which itself can be resolved in the DNS. An IP address could not be used … Read more
To answer the question: This is almost always a lead-acid battery failure causing the battery to vent hydrogen sulfide (H2S). The battery needs to be replaced as soon as possible. As an additional note, H2S can be extremely dangerous at higher concentrations. If you experience eye irritation or difficulty breathing or your ability to smell … Read more