Most Popular
1500 questions
75
votes
6 answers
How to capture ack or syn packets by Tcpdump?
I want to use a filter rule to capture only ack or syn packets. How do I do this?
larry
- 4,217
75
votes
11 answers
How do I remove login credentials for a network location in Win7?
I just tried to access a folder like so:
\\somecomputeronmynetwork\somelocation$
When going to this location I'm prompted for a user name and password.
I put one in, and it let me in fine.
Now I need to remove that login, so I can try a different…
Joseph
- 1,776
75
votes
15 answers
Should I respond to an "ethical hacker" who's requesting a bounty?
I run a small internet based business from home and make a living at it to feed my family, but I'm still a one man show and internet security is far from my area of expertise.
Yesterday I received two emails from a guy who calls himself an "ethical…
Vincent
- 838
75
votes
7 answers
iptables equivalent for mac os x
I want to forward requests from 192.168.99.100:80 to 127.0.0.1:8000. This is how I'd do it in linux using iptables:
iptables -t nat -A OUTPUT -p tcp --dport 80 -d 192.168.99.100 -j DNAT --to-destination 127.0.0.1:8000
How do I do the same thing in…
nafe
- 1,301
75
votes
3 answers
What does "Error: Cycle". means in Terraform?
The Terraform docs for some weird reason do not explain what "Error: Cycle" means. I've looked everywhere but there is no mention of it on the official docs. (Turns out it is well-known term, a circular dependency, that someone apparently renamed…
Juan Jimenez
- 969
74
votes
6 answers
Why are CA root certificates all SHA-1 signed (since SHA-1 is deprecated)?
I understand that SSL certs cannot be signed using SHA-1 anymore. Yet, all CA root certificates are SHA-1 signed (mostly). Does it mean the same algorithm that is no longer trusted for "you grandma SSL shop" is fine for the uttermost top secured…
131
- 897
74
votes
5 answers
How do I tell when/if/why a container in a kubernetes cluster restarts?
I have a single node kubernetes cluster in google container engine to play around with.
Twice now, a small personal website I host in it has gone offline for a couple minutes. When I view the logs of the container, I see the normal startup sequence…
Marc Hughes
- 905
74
votes
8 answers
Why is the response on localhost so slow?
I am working on a tiny little PHP project for a friend of mine, and I have a WAMP environment setup for local development. I remember the days when the response from my local Apache 2.2 was immediate. Alas, now that I got back from a long, long…
Peter Perháč
- 1,069
74
votes
4 answers
How to remove missing systemd units?
I'm having trouble figuring out how to remove systemd units that no longer have files. They still seem to linger in the system somehow.
The old broken units I am trying to remove:
core@ip-172-16-32-83 ~ $ systemctl list-units --all firehose-router*
…
Andy Shinn
- 4,351
74
votes
9 answers
How can I automatically restart a Windows service if it crashes?
I have a Windows service that exits unexpectedly every few days. Is there a simple way to monitor it to make sure it gets restarted quickly if it crashes?
Liam
- 1,451
74
votes
2 answers
How should an IT department choose a standard Linux distribution?
There is a lot of community feeling about what Linux distributions are appropriate for production server environments and which aren't, however, a lot of this feeling seems religiously based, and seldom presented with supporting evidence.
Assuming…
wfaulk
- 6,986
74
votes
3 answers
How to test a LDAP connection from a client
How to check the LDAP connection from a client to server. I'm working on the LDAP authentication and this client desktop needs to authenticate via a LDAP server. I can SSH to the LDAP server using LDAP user but When in desktop login prompt, I can't…
FELDAP
- 989
74
votes
6 answers
How do I force Linux to reacquire a new IP address from the DHCP server?
The environment is Debian, although the answer will apply to all distributions.
GeneQ
- 407
74
votes
7 answers
How to correct Postfix' 'Relay Access Denied'?
This morning, in order to correct a problem with a name mismatch in the security certificate, I followed the recommended steps from How to fix mail server SSL?, but now, when attempting to send an email from a client (in this case the client is…
Noah Goodrich
- 20,497
74
votes
7 answers
How to force MySQL to connect by TCP instead of a Unix socket?
I would like to analyze mysql traffic. Right now, all mysql requests are sent to the MySQL unix socket:
unix 2 [ ACC ] STREAM LISTENING 3734388 15304/mysqld /var/run/mysqld/mysqld.sock
I'm trying to disable that socket to…
Max Corbeau
- 3,653