Reputation
Top tag
Next privilege 20,000 Rep.
Access 'trusted user' tools
Badges
1 17 42
Newest
 Nice Answer
Impact
~1.5m people reached

Apr
22
answered Is it becoming impossible to be a small mail provider?
Apr
20
answered DNS - how does it resolve the name servers itself?
Apr
20
comment Server is often slow to serve webpages and takes long to ssh into
@erthy You may need to modify the log format to report the time taken. I replace the %l field with %T (time taken seconds). Finer timing is generated if you use %{ms}T on Apache 2.4.13+, or %D.
Apr
18
comment Squid cache_peer round-robin algorithm not working as expected
I would expect public proxies to drop the connection after one request. This would be to conserve connection resources. Local repository may conserve. different resources by keeping connections open. Round-robin may not work as you expect if you also have ICP enabled,
Apr
18
comment Squid cache_peer round-robin algorithm not working as expected
Squid appears to be doing round-robin at a higher level than per request. HTTP has a keep-alive capability, which allows a single connection to hand multiple requests.
Apr
18
comment Server is often slow to serve webpages and takes long to ssh into
@ethy Unless you have enabled HostNameLookups, DNS should not be an issue for the apache2 web server. It is common for SSH logins to be slow if PTR lookups for the connecting server are slow. Unfortunately, many IP addresses do not have a DNS server for PTR records leading to timeouts on lookup. Do your access logs indicate that response times vary significantly? Your question does indicate you likely have problems with PTR records for your location, many of your clients may not have this issue.
Apr
17
answered Dovecot: Relative home directory paths not supported
Apr
17
revised Connect virtual subnets from two physical host
added 436 characters in body
Apr
17
answered Connect virtual subnets from two physical host
Apr
15
answered web service deployment does not appear in weblogic admin console
Apr
14
revised How to change reply to address if using smtp auth in Exim mail server
Add steps to work around issue.
Apr
14
comment How to change reply to address if using smtp auth in Exim mail server
@Rinshad I've updated the answer. If you change your Exim configuration it is likely your mail will be treated as Spam.. Fix the issue in your email composer.
Apr
14
answered Server is often slow to serve webpages and takes long to ssh into
Apr
14
revised How to change reply to address if using smtp auth in Exim mail server
added 690 characters in body
Apr
14
answered How to change reply to address if using smtp auth in Exim mail server
Apr
13
answered What is the best way to analyze data captured from sar?
Apr
13
comment rDNS / PTR record when using Cloudflare
@Folkman If you can't get your PTR record created, you will have difficulty sending email to any domain trying to reject SPAM. In Cloudflare, you need to mark your email servers as direct and loose the DOS protection.
Apr
10
revised Port decisions for email setup in 2016 (Ubuntu)
added 463 characters in body
Apr
10
comment Port decisions for email setup in 2016 (Ubuntu)
@Josh I've added a short answer that explains the ports you will need open.
Apr
10
answered Port decisions for email setup in 2016 (Ubuntu)