Reputation
18,234
Top tag
Next privilege 20,000 Rep.
Access 'trusted user' tools
Badges
1 17 42
Newest
 Nice Answer
Impact
~1.5m people reached

Jun
19
revised Run sendmail with port 25 blocked by ISP
Clarify response
Jun
19
comment How do I obscure my Wordpress install via htaccess?
@Avry: You will need to place the directives you would put in the <Directory> configuration in a .htaccess file in the matching directory. Note: Apache recommends you use the configuration if possible. Use version control to guard against overwrites.
Jun
19
comment Change effective id
@mike628: Editing the password file to do what you want is not a good idea. Any programs run using your id will have full access to the system overriding entirely the intent of using unprivileged accounts.
Jun
19
answered How do I obscure my Wordpress install via htaccess?
Jun
19
answered Run sendmail with port 25 blocked by ISP
Jun
19
answered What filesystem should I use for backuppc on CentOS/Debian and lots and lots (200k) of small hardcopied files?
Jun
9
revised Weird MySQL query plan: why is this query using temporary & filesort? How to optimize it?
Capitalize to clarify.
May
16
comment Savvis.net blocking routing
Thanks for the contact info. Everything is back up after the line drop was replaced. MTR is responding appropriately. It appears my ISP may not have been announcing routing for my IP address block. They are the next hop after savvis. Further investigation will be required when I return home.
May
16
awarded  Scholar
May
16
accepted Savvis.net blocking routing
May
16
comment Savvis.net blocking routing
Thanks for the lookup. Finally got throuth to my ISP and they report the Modem at my end seems dead. Diagnostic traces from here still end at savvis.net in Chicago. A technitian is showing up early Monday AM to see what the problem is.
May
14
awarded  Student
May
14
asked Savvis.net blocking routing
May
12
comment Incoming mail from sender, MX record won't accept replies. How to block the incoming SMTP connection from that sender?
@bignose Exim provides a verify_sender condition for ACLs. I limit it to sroute checking, as checking senders drops legitimate mail my user want. There are options to check for a valid postmaster or random userids. See exim.org/exim-html-current/doc/html/spec_html/… for details.
May
11
revised How to reject/detect emails claiming to be from my own domain?
Include solution I use.
May
11
revised Sendmail looks to be crashing my server. Can I disable it?
Fix syntax.
May
8
comment Incoming mail from sender, MX record won't accept replies. How to block the incoming SMTP connection from that sender?
@bignose: There are a number of legitmate mailing list and autmated senders who do NOT accept e-mail in any form either at the address or their MX. This is bad form, but gets rid of all the spam they are likely to get. If you don't mind dropping these mail sources, you can drop senders you can't reply to. Howver, callouts to some of the big freemail senders can get your reputation with them downgraded (again bad form).
May
6
comment How to reject/detect emails claiming to be from my own domain?
If you can have an ACL on the MAIL command (as you can in Exim), you can drop the mail long before you get to the point of applying a filter.
Apr
25
comment block program with iptables
Just match on owner. This will disable that owner from connecting entirely. This may be a problem if you use the UID for other things. You may need to exempt some ports. Check the log messages when the program runs to determine the ports and addresses it uses.
Apr
23
comment Deleted files from /etc/exim4
@Steven: Correct, but it was stated that the package was purged. This will result in the conffiles being deleted. Conffiles are listed in the package's .conffiles file in the /var/lib/dpkg/info directory. Files the user added are kept as the are not listed, and the corresponding directories are kept because they are not empty.