firewall

I am having some problem regarding Paypal IPN not getting fired on one of my server. Below is the scenario. 1) I have two sites site A(old) is on server X and site B(new) on server Y.Both the sites having identical Paypal express checkout form submission and IPN code. 2) Site A is running smoothly with paypal express checkout form submission and IPN is get fired correctly. 3) But with Site B, though our form gets submitted correctly and payment is successful, IPN is not getting fired. More information : I checked Paypal`s business A/c for any of functionality that may needed to add IP/domain

I am currently working at a client were they have locked down the network, except for ports 80 and 443. I need to connect to our server using SSH, but the same server also runs our website. We do not want to invest in a new server or place a second network card. I have been searching the internet for away to setup our linux server (running CentOS 5), so that there is a daemon listening on port 443 that depending on the client protocol forwards the request to the correct internal port (SSH 22 or HTTPS moved to a differentport_. There are a lot of people on internet looking for this kind

I'm trying to construct a webapp to add events to an employee's google calendar and would like to use OAuth for authentication. However, my webapp is forced to be on an intranet behind a firewall; the server has outbound internet access, but blocks in-bound access if you aren't on the intranet or VPNing into the intranet. I'm reading up on OAuth, but can't figure out if part of the authentication-handshaking process would be blocked by my firewall. (And I'd like to know if its possible before spending time to implement if it isn't possible; and know so if I run into errors I can debug them).

How to block mysql port 3306 for everybody, but allow it for a specific IP? This is what I currently do: iptables -I INPUT 1 -p tcp --dport 3306 -j ACCEPT user259412 You need multiple rules to do that. In most cases, what will happen with a connection depends on the first rule, which it matches. So, first we accept our friends connection, second, we drop anybody other. Voila! iptables -I INPUT 1 -p tcp -s 1.2.3.4 --dport 3306 -j ACCEPT iptables -I INPUT 2 -p tcp --dport 3306 -j DROP 来源： https://stackoverflow.com/questions/22309726/restricting-mysql-3306-port-with-iptables

I need to open specific port for my application. I have tried using INetFwAuthorizedApplication rule per application for all ports. fwMgr.LocalPolicy.CurrentProfile.AuthorizedApplications.Add(app) Alternatively open one port for all appllications using INetFwOpenPort . firewallManager.LocalPolicy.CurrentProfile.GloballyOpenPorts.Add(port) Is there any way to programmatically open only single port per application programmatically? I can do it manually through firewall settings. Colin Pickard There's a question about blocking connections with an answer with instructions for creating firewall