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answered How to redirect one domain to the other with SSL?
Aug
16
comment Connection refused on Ubuntu EC2 after EBS expansion
When you mounted the volumes on another instance, did you have a look at the syslog and messages files? What was in them?
Aug
14
answered Limit User Linux Login using IPTABLES
Jul
25
comment How to create a private network between a VPS and 4 IPs?
Note: this doesn't create a private network. It permits you to secure connections over a public network, which is not the same thing.
Jul
23
comment How to setup redundancy for AWS Elastic Load Balancers?
Note that by default an ELB node will only direct traffic to instances in the Availability Zone that node is in. For improved resilience and load balancing, you should enable cross-zone load balancing on your ELBs.
Jul
23
comment Scaling Multiple SSL Domains on Multiple EC2 instances in AWS ELB
If you're not using Route 53 for DNS, you basically can't use SSL ELBs for your naked domain. You'll have to handle it some other way, typically by serving a 301 redirect from http://example.com/ to https://www.example.com/.
Jul
15
awarded  Good Answer
Jul
14
comment Is this a sensible way to scale Nginx for static content serving?
If you're going to cache files or use a CDN, you need a careful file naming strategy. Most important, every modification to a file must generate a new filename -- you can never change a file while keeping the name the same. Also think carefully about how you will delete files and invalidate them in the cache or CDN.
Jul
1
comment Setting up a caching system r/w in DCs across continents
You're at the mercy of the CAP theorem. Since a global network will frequently be partitioned, you have to choose between availability and consistency -- you can't have both.
Jun
22
comment How to know if a machine is an EC2 instance
Do you need the method to work against an attacker who has root on the host, and is trying to spoof you into thinking that it's an EC2 instance for his own malicious purposes? If you do, then it will be much harder.
Jun
20
answered Different subnet mask on router and DHCP server
Jun
20
comment TCP sequence number
@RussellBorogove Yes, you're correct about the malicious agent -- I was going by the example in the question of a normal delayed packet and resend.
Jun
19
answered TCP sequence number
Jun
15
comment SSL certificate, manage domain and subdomain with SAN
If you use your domain.tld as the common name then www.domain.tld will get a warning message on browsers that don't support SAN. If a browser doesn't support SAN then there's no way at all to make both domain.tld and www.domain.tld work without a warning -- you have to pick one or the other.
Jun
15
answered SSL certificate, manage domain and subdomain with SAN
Jun
10
answered Can a.X.com CNAME a.Y.com
May
28
answered What information is lost on a connection when passing it through a aws load balancer?
May
27
answered Wildcard SSL cert warning of insecure content across sub domains
May
16
comment Reverse DNS does not contain the hostname error from MXToolBox
Yes, that's correct. The forward lookup for the A record has to match the reverse lookup for the PTR record.
May
16
answered Reverse DNS does not contain the hostname error from MXToolBox