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Mastering Development System & Network

External host is mapped to 127.0.0.1 to connect over VPN

What would be the reason of adding "127.0.0.1 aws.rds.host" to /etc/hosts when connected to VPN and Jumphost inside of this tunnel to execute something on private cloud?

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Mastering Development System & Network

Certificate Enrollment Error The Specified File Is Read Only

Well. It seems the entire internet has never seen this error before. I have a Windows Enterprise PKI infrastructure. I have made a copy of the CEP Encryption template, and changed the security permissions on the template so that the machine account that I am using has READ; ENROLL; and AUTOENROLL permissions. I also, as […]

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Mastering Development System & Network

no login/no home dir user gets permission for denied (redhat8)

I am trying to solve a problem At work there is a given task where a python application is currently running on a server, this application is using a env file, which has username and password information. The current ask is to hide the username and password string such that it’s not available for regular […]

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Mastering Development System & Network

CVE-2021-26855 Explanation

I patched on 3/3 This just looks like we were probed and not compromised, can some one please confirm? I’m not sure how to interpret this. Ran Test-Hafnium.ps1 Contents of CVE-2021-26855.log #TYPE Selected.System.Management.Automation.PSCustomObject "DateTime","AnchorMailbox" "2021-03-02T09:50:56.279Z","ServerInfo~a]@Exchange001.contoso.com:444/autodiscover/autodiscover.xml?#" edit: The scan found the following entry 2021-03-02T09:50:56.279Z,5f083d36-1b8a-489b-9bdc-e3859dea08f4,15,1,2106,2,,Ecp,207.207.49.16,/ecp/y.js,,FBA,false,,,ServerInfo~a]@Exchange001.contoso.com:444/autodiscover/autodiscover.xml?#,ExchangeServicesClient/0.0.0.0,157.230.221.198,EXCHANGE001,200,200,,POST,Proxy,exchange001.contoso.com,15.00.0001.000,IntraForest,X-BEResource-Cookie,,,,347,362,,,0,0,,0,,0,,0,0,,0,295,0,0,17,0,274,0,0,0,1,0,294,1,274,4,21,21,295,,,,BeginRequest=2021-03-02T09:50:55.983Z;CorrelationID=;ProxyState-Run=None;FEAuth=BEVersion-1941962753;NewConnection=::1&0;BeginGetRequestStream=2021-03-02T09:50:55.983Z;OnRequestStreamReady=2021-03-02T09:50:55.998Z;BeginGetResponse=2021-03-02T09:50:55.998Z;OnResponseReady=2021-03-02T09:50:56.279Z;EndGetResponse=2021-03-02T09:50:56.279Z;ProxyState-Complete=ProxyResponseData;SharedCacheGuard=0;EndRequest=2021-03-02T09:50:56.279Z;,,,,,,CafeV1 In the following file "\exchange001.contoso.com\C$\Program Files\Microsoft\Exchange Server\V15\Logging\HttpProxy\Ecp\HttpProxy_2021030209-1.LOG" I did not find any […]

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Mastering Development System & Network

Windows 10 shows themed images on login screen, then opens browser to page related to image after login – how can I prevent it?

On the login screen they show pictures, and I have to admit, sometimes they are nice but I do not want them. After I log in, windows 10 starts the browser and it goes to a page related to the image they used on the login screen. I attached the screenshot of the browser that […]

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Mastering Development System & Network

Azure cannot create cert to second-level domain, correct A record exist

we took a message "A record doesn’t exist" but we have correct A record in our DNS zone. When we try to create cert to subdomain – everything is ok. How can we create a cert to second-level domain dinamicka.com ?

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Mastering Development System & Network

How to permanently set vault token and url remote server in macos

On Linux I’m setting vault variables to /etc/environment next: export VAULT_URL=’https://some-remote-server.org:8200/’ export VAULT_TOKEN=’SoMeToKeN’ But when I’m typeing this in macos, after $> vault status I’m getting Error checking seal status: Get "https://127.0.0.1:8200/v1/sys/seal-status": dial tcp 127.0.0.1:8200: connect: connection refused What am I doing wrong and how to do it right to get remote access to the […]

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Mastering Development System & Network

MAIL API deliverability issue with microsoft mail servers

My application started randomly experiencing deliverability issues when sending mail to Outlook and Hotmail addresses. I’m sending mail in java 8 through the mail api Transport.send(msg). This uses a dynamic range of ips to send mail and I’ve found the at least 3 of them are blacklisted currently. I guess this could be a big […]

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Mastering Development System & Network

pkg OSVERSION mismatches jail/host

I have a FreeBSD Host and some jails, the output of freebsd-version -u in the host and in the jail is 12.2-STABLE. In the host the output of uname -K and pkg -vv | grep OSVERSION matches 1202505 but within the jail I get OSVERSION = 1201512; I updated the host and the jail but […]

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Mastering Development System & Network

Unable to create Output and Locator on Live Streaming

I have followed this document: https://docs.microsoft.com/en-us/azure/media-services/latest/live-events-obs-quickstart I performed steps as below: Created Resource group, storage account, media resource & Live event using my free azure account Using the live event url, started my live streaming through OBS Live stream is showing fine in azure. Now when I try to create output (after filling the required […]