Latest Server related questions

Score: 1
The same message delivered multiple times on postfix
in flag

I have a problem with the postfix server I manage.

Server was working fine for over 4 years, but recently I have one issue with it.

Some e-mail messages are delivered on "my '' server many times. Those multiplied messages come from some big providers like amazon ses or zoho mail. I have found a similar thread on zoho forum, but it ends with a private message to zoho admins and I can't see how this s ...

Score: 0
TRONG NGUYEN avatar
Ansible regex_search module
cn flag

Can anyone please help me to explain this code in ansible regex_search module:

- set_fact:
    regex: "{{ '/opt/conf/path.txt' | regex_search('/?(.*)', '\\1') }}'
  • What "\\1" means in this code.
  • What is the function of each special letter in '/?(.*)'
Score: 1
Best way to reformat a JSON with Ansible?
cn flag
raw

I have this JSON in a variable :

{
"device_vlans": {
    "1": {
        "name": "default",
        "interfaces": [
            "GigabitEthernet1/1",
            "GigabitEthernet1/2",
            "GigabitEthernet1/3"
        ]
    },
    "20": {
        "name": "VLAN20",
        "interfaces": [
            "GigabitEthernet1/2"
        ]
    },
    "30": {
        "name": "VLAN30",
        "interface ...
Score: 0
Maestro avatar
Firewalld port forwarding to virtual IP
gs flag

I'm trying to replace an existing AutoSSH tunnel with firewall rules:

firewall-cmd --zone=public --add-forward-port=port=9999:proto=tcp:toport=9999:toaddr=100.1.1.1

This should forward all incoming TCP connections to 100.1.1.1

The problem is that it does not work (the port stays closed). I'm trying to understand what I'm doing wrong, and the only thing I can think of is that the destination IP address is ...

Score: 0
The security database on the server does not have a computer / workstation trust relationship - on a domain controller
pt flag

"The security database on the server does not have a computer account for this workstation trust relationship"

This is the message I am getting when I try to log into the only domain controller we have on the network. I have seen this before on workstations and have successfully repaired the trust relationship by unplugging the ethernet cable, logging into the workstation, reconnecting the ethern ...

Score: 0
Brad Silva avatar
Is it possible to identify what KBs are included in a Windows rollup patch (or is that not the right way to look at this)?
br flag

I have some software that is known to conflict with a specific patch (KBxxxxx), so until the vendor comes out with an update that fixes this conflict, I have to avoid installing that patch.

I'm assuming that Windows rollup patches include a stack of the various KB patches, but I haven't been able to identify a way to see what KBs are included.

I really don't want to not install patches, although tha ...

Score: 0
Exchange traffic between tun0 and tun1 using iptables
cn flag

I have two vpn's that I've created each of which accomplishes their own networking goals. tun0 forwards all traffic to a socks5 proxy and tun1 accepts vpn connections. These interfaces are created inside of a docker container. tun0 seems to be fully operational without any extra configurations. However I am experiencing some issues with tun1...

  1. Although I am able to connect to the vpn server (tun1) I ...
Score: 0
IPs blocked automatically by my firewall are all from Cloudflare
cn flag

I have a website that uses Cloudflare, in my host level firewall I have noticed that all IPs automatically detected as malicious are identified as "owned by Cloudflare" and I don't know how this is possible.

Does this mean that simply Cloudflare blocks all others malicious attacks but is unable to filter bad actors to perform attacks hidden by their CDN services?

...or these could be false positive ...

Score: 0
philolegein avatar
How to optimise javascript delivery on wordpress / apache / AWS?
cv flag

I'm down the rabbit-hole of website speed optimization. I have a site that's getting terrible marks from all of the usual suspects (PageSpeed and GT Metrics, specifically; it looks OK on Pingdom tools).

My setup is a single T3-Medium server running Apache and Wordpress, behind an AWS ELB, with deployment to CloudFront as the CDN.

My first attempts to improve performance included

  • upgraded to Mediu ...
Score: 1
T1M avatar
Change Docker Volume storage location
fr flag
T1M

Since nearly the beginning, I have used mount binds for persistent data with docker, as the official way of backing up a docker volume is to give it to another container to save it in a tar... Just using rsync on the directory mount seemed much better, but in basically every docker-compose example, volumes are used.

The Documentation states multiple reasons why volumes are so much better, and that yo ...

Score: 0
Simon Richard avatar
NGINX double proxy not allowing websocket connections
lb flag

I have two nginx proxies setup on my machine, one to unwrapp SSL and the other to do application-specific proxying (only the second one is version controlled). When I only had one proxy I was able to make successful websocket connections, but after moving to two all websocket upgrade requests are responded to with a 502 Bad Gateway error. I can confirm that normal http/https requests are working with my ...

Score: 0
DHCP C class subnet enlarging
us flag

We have vlans to separate traffic. Our wireless network is a separate vlan such as scope ID : 192.168.100.0 So we have been using 192.168.100.0 sat on 255.255.255.0 netmask vlan100.

With in the scope I have reservations and some static mappings on a few clients and therefore looking for the easiest way of increasing the IP addresses with little affect.

My question is : how can we extend my DHCP sco ...

Score: 0
jerryrig avatar
Win 10 MKLINK in C:\Users Access Denied
us flag

I have Win 10 21H2 Bld 19044.1706 stand-alone workstation, no domain, just WORKGROUP.

I did a Laplink PCMover transfer to new computer but it changed profile name from "john.WORKGROUP" to "john". Everything is working except a million links like "C:\Users\john.WORKGROUP\Documents\something.exe" so I want to make a link named "C:\Users\john.WORKGROUP" that points to "C:\Users\john" but everything ...

Score: 1
Postfix / OpenDKIM config on Centos8
cn flag

I've setup Postfix with Dovecot as an integrated mail service for my SaaS app, it worked great as an inbox. The issue started when I started to send emails, it was not signed so I went ahead and installed opendkim and configured it with Postfix, emails going out great signed no issues, but no

I broke the inbound messages. I cannot for the life of it figure out where I went wrong.

maillog:
May 30 22:12:30  ...

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