754 reputation
821
bio website bitdepth.thomasrutter.com
location Australia
age 34
visits member for 5 years, 9 months
seen 15 hours ago

Web application developer by day who has also dabbled in audio, video and image tools.


15h
comment Is it bad to have the reverse DNS for two IPs point to the same domain name?
For example I just looked up google.com and the IP I got was 216.58.220.110. The reverse record for that is syd10s01-in-f14.1e100.net. I looked up that and got the same IP: 216.58.220.110. So that Google server passes FCrDNS check, even though the name it used for that purpose, syd10s01-in-f14.1e100.net, had nothing to do with the name I access that server by (which is google.com) or names used for things like SSL.
15h
comment Is it bad to have the reverse DNS for two IPs point to the same domain name?
This shouldn't affect any services you have, that is it should not not affect your ability to do HTTPS or LDAPS or to load balance with many servers. The FCrDNS check does not have to use the same hostname as the hostname you are using to access the server. It can use any hostname; usually an internal hostname not necessarily seen by end users unless they did a PTR check. All that is required is that each unique IP visible to the world uses something for a unique hostname that resolves back to that IP.
1d
awarded  Popular Question
Oct
18
comment What is the best Linux distribution for a production Web Server?
Debian went to a scheduled freeze date, but not a scheduled release date. It's still released "when it's done" ie when all RC bugs are eliminated and thus actual release date can still vary. Plus even the freeze date is only used as a guideline, not set in stone. Its aim was to make release schedule more predictable without compromising stability and the freeze process.
Oct
3
comment Nginx with SPDY Draft 3, is possible?
Note to current visitors: Chrome and Firefox (at least) have since dropped SPDY/2 support completely.
Sep
30
awarded  Explainer
Aug
29
awarded  Necromancer
Jul
16
comment Nginx as network edge HTTP cache?
Its support for caching is poor, and it does not support proxying of HTTPS (ie, the CONNECT method). It supports just enough proxying features to make it useful as a reverse proxy, and the fact it works as a forward proxy at all is just a bonus.
Jul
15
comment Nginx as network edge HTTP cache?
You can use nginx as a forward proxy - but it is not as full-featured as something like Squid.
Jul
7
comment How to redirect all mail from one domain to another in Postfix?
The virtual file is the virtual_alias_domains list.
Jul
2
awarded  Curious
Jun
26
answered How do mx records work when there are multiple ones at the same priority?
Jun
25
revised OpenDKIM - verifying mail forwarded by mailing lists
added 4 characters in body
Jun
25
revised OpenDKIM - verifying mail forwarded by mailing lists
deleted 1 character in body
Jun
25
answered OpenDKIM - verifying mail forwarded by mailing lists
Jun
24
comment How can you test a backup / secondary MX server?
@EvanAnderson This is a good general principle until it comes to testing STARTTLS or any AUTH other than PLAIN. But yes in this case you're absolutely right.
Jun
24
comment How can you test a backup / secondary MX server?
@joeqwerty I'm actually thinking of migrating a mail server to another machine which will involve setting up the old server to relay to the new server during the DNS propagation (even with low TTL values, some resolvers will cache for 30 minutes or more). Since I'll need to put in the effort to get this relaying working correctly anyway, I thought I may as well create a backup MX server configuration. And it'll be a learning experience. This was just to give a bit of background about why.
Jun
24
comment How can you test a backup / secondary MX server?
@Halfgaar if the secondary MX server is misconfigured it could lead to loss of mail in the unlikely event that a sender is unable to connect to the primary MX server for any reason (including a connectivity problem at their end). At least if it hasn't been added to the DNS yet then a transient issue with the primary won't cause loss of mail - a sender will just queue the mail and try again later.
Jun
24
accepted How can you test a backup / secondary MX server?
Jun
23
asked How can you test a backup / secondary MX server?