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  • I need to pad IP addresses with Zeroes for each octet

    - by Felipe Alvarez
    Starting with a string of an unspecified length, I need to make it exactly 43 characters long (front-padded with zeroes). It is going to contain IP addresses and port numbers. Something like: ### BEFORE # Unfortunately includes ':' colon 66.35.205.123.80-137.30.123.78.52172: ### AFTER # Colon removed. # Digits padded to three (3) and five (5) # characters (for IP address and port numbers, respectively) 066.035.05.123.00080-137.030.123.078.52172 This is similar to the output produced by tcpflow. Programming in Bash. I can provide copy of script if required. If it's at all possible, it would be nice to use a bash built-in, for speed. Is printf suitable for this type of thing?

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  • How to difference sockaddr_in struct from same subnetwork and different IP/users

    - by user1428926
    I am developing a gaming server using the Winsock2 API from Windows, just for now until porting it to Linux. The main problem I have found is that I don't know how to differentiate gaming clients that come from the same router/network. Let´s imagine 2 gamers that are in the same network going to the Internet through the same router IP and port with, for example IP 220.100.100.100 and port 5000, how can my C/C++ server differentiate both TCP connections and know that they are two different gamers? Can I find any difference in the sockaddr_in struct that returns the socket when accept(...) returns ??

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  • Cannot bind to IPv6 address

    - by ereOn
    I am facing a strange problem on my Ubuntu Karmic system. When I call getaddrinfo() with AI_PASSIVE and AF_UNSPEC, for an empty host and the UDP 12000 port to get a bindable address, I only get back one IPv4 result (0.0.0.0:12000 for instance). If I change my call and specify AF_INET6 instead of AF_UNSPEC, then getaddrinfo() returns "Name or service not known". Shouldn't I get [::]:12000 as a result ? The same thing happens if I set the host to ::1. When I call getaddrinfo() without AI_PASSIVE (to get a "connectable" address) for the host "localhost" and the UDP 12000 port, I first get [::1]:12000 then 127.0.0.1:12000. So apparently, my system is IPv6 ready (I can ping to both IPv4 and IPv6 addresses, as well as DNS resolution). But how is it that I can't get an IPv6 address to bind to with getaddrinfo() ? Do you guys have any idea about what could be wrong ? My OS is Ubuntu Karmic, fresh install without any networking tweaking. Thank you.

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  • How to determine IP used by client connecting to INADDR_ANY listener socket in C

    - by codebox_rob
    I have a network server application written in C, the listener is bound using INADDR_ANY so it can accept connections via any of the IP addresses of the host on which it is installed. I need to determine which of the server's IP addresses the client used when establishing its connection - actually I just need to know whether they connected via the loopback address 127.0.0.1 or not. Partial code sample as follows (I can post the whole thing if it helps): static struct sockaddr_in serverAddress; serverAddress.sin_family = AF_INET; serverAddress.sin_addr.s_addr = INADDR_ANY; serverAddress.sin_port = htons(port); bind(listener, (struct sockaddr *) &serverAddress, sizeof(serverAddress)); listen(listener, CONNECTION_BACKLOG); SOCKET socketfd; static struct sockaddr_in clientAddress; ... socketfd = accept(listener, (struct sockaddr *) &clientAddress, &length);

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  • IP Address not obtained in java

    - by nilesh
    This code used to return my local ip address as 192.xxx.x.xxx but now it is returning 127.0.0.1 . Please help me why the same code is returning different value. Is there something that I need to watch at linux OS. import java.util.*; import java.lang.*; import java.net.*; public class GetOwnIP { public static void main(String args[]) { try{ InetAddress ownIP=InetAddress.getLocalHost(); System.out.println("IP of my system is := "+ownIP.getHostAddress()); }catch (Exception e){ System.out.println("Exception caught ="+e.getMessage()); } } }

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  • how to restrict a page to only a specified ip range in php

    - by Mac Taylor
    hey guys im looking for a way to restrict my administration page to only my own ip range concider my ip range is 215.67.. so in php i will begin with this : $myip = "215.67.*.*"; $myip = explode(".", $my_ip); $userip = getenv("REMOTE_ADDR") ; $userip = explode(".", $userip); if ($myip[0] == $userip[0] AND $myip[1] == $userip[1] ) { //Contunue admin } is there any better and more professional way to do it ?

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  • Problem with domain getting turned to IP address for https

    - by user229133
    I have a website that is using Windows Server 2003. The site is called https://mysite.com/ and at ip address 111.1.1.1. Now when I log into the site all my relative links that are generated using NavURL (<%# NavURL("Images/Menu/img.gif")%) are saying "http://111.1.1.1/Images/Menu/img.gif" instead of "https://mysite.com/Images/Menu/img.gif". This is causing an error because it needs to be secure. I'm sure there is a setting on the server somewhere to point to the name and not the ip, but I don't know where. Thanks for your help.

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  • Protecting IP for scripting projects

    - by Francisco Garcia
    There are some tasks where the obvious language choice is with scripting languages: bash, Python, Ruby, Tcl... however I find it hard to protect a company IP once the product is delivered because the application is never compiled. The client will have complete access to every single line of code. Which one are the choices to protect a product IP when it is best implemented with scripting languages? (switching to a compiled language such as C++ should not be an option) I know that some interpreted languages can be compiled, but there are cases where the process can be inverted

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  • Trying to link a domain to a IP

    - by user248959
    Hi, I have registered mydomain.com now i want to redirect to my IP hosting account. The DNS editor shows two fields: Name and Address. In Address i wrote the IP i want the domain redirects. And in Name I wrote mydomain.com. After submitting the form, the page shows this line: Name Type Record mydomain.mydomain.com. A 173.203.58.251 I expected it shows this: Name Type Record mydomain.com. A 173.203.58.251 Is that OK? or am i doing some wrong? Regards Javi

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  • how to use ip address in xsl

    - by user1597122
    I'm using xsl to generate html from xsl. I have to use ip address in name of the class in css like this: <td><div title="delete" > <xsl:attribute name="class"> delete_link_<xsl:value-of select="destinationIp"/> </xsl:attribute> <img class="row-remover" src="/media/img/remove.png"/> </div></td> and i have this jquery function: $('.delete_link_<xsl:value-of select="destinationIp"/>').click( function() { // do some thing here }); but because there are 'dots' in ip address, the above code doesn't work. when i remove dots of destinationIp tag in xml file, it works. so i think it has problem with 'dot'. any idea to make it work? really thanks :)

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  • How-To Configure Weblogic, Agile PLM and an F5 LTM

    - by Brian Dunbar
    Agile, Weblogic, and an F5 walk into a bar ... I've got this Agile PLM v 9.3 Running on WebLogic, two managed servers. An F5 BigIP LTM. We're upgrading from Agile v 9.2.1.4 running on OAS. The problem is that while the Windows client works fine the Java client does not. My setup is identical to one outlined in F5's doc: http://www.f5.com/pdf/deployment-guides/bea-bigip45-dg.pdf When I launch the java client it returns this error "Server is not valid or is unavailable." Oracle claims Agile PLM is setup correctly, but won't comment on the specifics of the load balancer. F5 reports the configuration is correct but can't comment on the specifics of the application. I am merely the guy in a vortex of finger-pointing who wants my application to work. It's that or give up on WLS and move back to OAS. Which has it's own problems but at least we know how it works. Any ideas?

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  • Per client DNS server assignment using Pfsense

    - by Trix
    I have a network where pfsense is the gateway. There are two sets of clients that I want. One where there will be some restrictions to the network (example, IM being blocked) and one network where there are no restrictions. One easy way I thought about doing this was assigning the different domains different DNS servers. One set could use OpenDNS, the other could use Google's Public DNS. The set with OpenDNS would have the filter options on (using OpenDNS' dashboard, I can check block IM .... so I do not manually need to block login.oscar.aol.com, meebo.com, gmail chat ....etc). So the problem is the DHCP server looks like it will only assign a single set of DNS servers to clients. Is there a way to set a per client assignment? Is there a better way to obtain what I want to obtain. This is just a small home network. I do not need anything fancy, but I do need this functionality in one way or another.

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  • Loadbalancing outbound traffic while using openbgpd on freebsd

    - by Rajkumar S
    Hi, I am using openbgpd in freeBSD with 2 ISP connections. I have my own AS number and a /22 network. Currently I am advertising entire /22 to both networks. Inbound traffic comes in But my outbound traffic goes via a single link. I would like to either distribute my outbound traffic via both links so that outbound traffic is also load balanced. How to configure this using openbgpd in freebsd? My current openbgpd config is attached for reference. AS 00my-as listen on xx.xx.xx.x router-id xx.xx.xx.x network aa.aa.aa.0/22 group "ISP1" { remote-as 11remoteas-1 neighbor bb.bb.bb.1 { descr "ISP1" announce all } } group "ISP2" { remote-as 22remoteas-2 neighbor cc.cc.cc.37 { descr "ISP2" announce all } } deny from any deny to any allow from bb.bb.bb.1 allow to bb.bb.bb.1 allow from cc.cc.cc.37 allow to cc.cc.cc.37

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  • Web server behind MikroTik and dynamic dns

    - by danielrvt
    I recently purchased a MikroTik router, it works great! However, I haven't been able to make my web server work from outside my lan I'll explain better: I have two domains in my disposal, before I switched to Mikrotik, the were working perfectly and all my websites were online. Since I changed the router, every time I try to access my websites from outside my lan, my websites can't be found. I have my websites domains associated with a dynamic dns provider, I managed to create a port forwarding rule to redirect all my incoming traffic from port 80 to my web server, and it works, but only when I'm connected to my MikroTik router. Is there something else I have to do? PD: I also created a static dns rule in my router with my domains to associate it to my webserver (which is behind my router) PD2: All I want is to redirect requests from outside to my webserver...

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  • SQL instance through F5 BigIP VIP

    - by Sam
    We have a SQL 2008 instance Server01\instance02. The port is set to 1466. We've set up a VIP named Server1 Attempting to connect to Server1\instance02 does not work. Server1,1466 does work. We have ports 1433, 1434 and 1466 open. Can we configure this to be able to use the name without any changes to the SQL client. Thanks!!

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  • HAProxy: session stickiness triggered by response header possible?

    - by zoli
    I'm investigating HAProxy as a possible replacement for F5. F5 is capable of persisting a session based on a response header value: when HTTP_RESPONSE { set session [HTTP::header X-Session] if {$session ne ""} { persist add uie $session } } and then route all subsequent requests which contain the same session ID in a header, query parameter, path, etc. to the same machine, eg: when HTTP_REQUEST { set session [findstr [HTTP::path] "/session/" 9 / if {$session} { persist uie $session } } I'm wondering if this is even possible to do with HAProxy?

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  • F5/BigIP rule to redirect affinity-bound users from INACTIVE pool node to other ACTIVE node

    - by j pimmel
    We have several server nodes set up for the end users of our system and because we don't use any kind of session replication in the app servers, F5 maintains affinity for users with the ACTIVE node the client was first bound to. At times when we want to re-deploy the app, we change the F5 config and take a node out of the ACTIVE pool. Gradually the users filter off and we can deploy, but the process is a bit slow. We can't just dump all the users into a different node because - given the update heavy nature of the user activities - we could cause them to lose changes. That said, there is one URL/endpoint - call it http://site/product/list - which we know, when the client hits it, that we could shove them off the INACTIVE node they had affinity with and onto a different ACTIVE node. We have had a few tries writing an F5 rule along these lines, but haven't had much success so i thought I might ask here, assuming it's possible - I have no reason to think it's not based on what we have found so far.

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  • Does Windows XP automatically reassemble UDP fragments?

    - by Matt Davis
    I've got a Windows application that receives and processes XML messages transmitted via UDP. The application collects the data using Windows "raw" sockets, so the entire layer 3 packet is visible. We've recently run across a problem that has me stumped. If the XML messages (i.e., UDP packets) are large (i.e., 1500 bytes), they get fragmented as expected. Ordinarily, this will cause the XML processor to fail because it attempts to process each UDP packet as if it is a complete XML message. This is a known short-coming in the system at this stage of its development. On Windows 7, this is exactly what happens. The fragments are received and logged, but no processing occurs. On Windows XP, however, the same fragments are seen, and the XML processor seems to handle everything just fine. Does Windows XP automatically reassemble UDP fragments? I guess I could expect this for a normal UDP socket, but it's not expected behavior for a "raw" socket, IMO. Further, if this is the case on Windows XP, why isn't the behavior the same on Windows 7? Is there a way to enable this?

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  • Predictive vs Least Connection Load Balancing Techniques

    - by Mani
    I have a windows based desktop application that communicates via TCP to the application servers. (windows 2003). No sticky sessions between client calls. We have exactly 2 servers to load balance and we are thinking to use a F5 hardware NLB. The application is a heavy load types, doing not much bussiness logic in the services but retrieving quite a big amount of data at most of the times. May be on an average 5000 to 10000 records at all times. Used mainly for storing and retirieving data and no special processing of data or calculations running on the server side. I am favouring 'predictive' considering my services take a while at times to return data and hence tracking the feedback would yield some better routing as in predictive. I am not sure if the given data is sufficient enough to suggest some ideas but considering these, what would be some suggestions\things to consider\best between Predictive and Least Connections ? Thanks.

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  • How-To Configure Weblogic, Agile PLM and an F5 LTM

    - by Brian Dunbar
    Agile, Weblogic, and an F5 walk into a bar ... I've got this Agile PLM v 9.3 Running on WebLogic, two managed servers. An F5 BigIP LTM. We're upgrading from Agile v 9.2.1.4 running on OAS. The problem is that while the Windows client works fine the Java client does not. My setup is identical to one outlined in F5's doc: http://www.f5.com/pdf/deployment-guides/bea-bigip45-dg.pdf When I launch the java client it returns this error "Server is not valid or is unavailable." Oracle claims Agile PLM is setup correctly, but won't comment on the specifics of the load balancer. F5 reports the configuration is correct but can't comment on the specifics of the application. I am merely the guy in a vortex of finger-pointing who wants my application to work. It's that or give up on WLS and move back to OAS. Which has it's own problems but at least we know how it works. Any ideas?

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  • Redundant OpenVPN connections with advanced Linux routing over an unreliable network

    - by konrad
    I am currently living in a country that blocks many websites and has unreliable network connections to the outside world. I have two OpenVPN endpoints (say: vpn1 and vpn2) on Linux servers that I use to circumvent the firewall. I have full access to these servers. This works quite well, except for the high package loss on my VPN connections. This packet loss varies between 1% and 30% depending on time and seems to have a low correlation, most of the time it seems random. I am thinking about setting up a home router (also on Linux) that maintains OpenVPN connections to both endpoints and sends all packets twice, to both endpoints. vpn2 would send all packets from home to vpn1. Return trafic would be send both directly from vpn1 to home, and also through vpn2. +------------+ | home | +------------+ | | | OpenVPN | | links | | | ~~~~~~~~~~~~~~~~~~ unreliable connection | | +----------+ +----------+ | vpn1 |---| vpn2 | +----------+ +----------+ | +------------+ | HTTP proxy | +------------+ | (internet) For clarity: all packets between home and the HTTP proxy will be duplicated and sent over different paths, to increase the chances one of them will arrive. If both arrive, the first second one can be silently discarded. Bandwidth usage is not an issue, both on the home side and endpoint side. vpn1 and vpn2 are close to each other (3ms ping) and have a reliable connection. Any pointers on how this could be achieved using the advanced routing policies available in Linux?

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