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  • Linux server very slow after IP change and synflood attack

    - by Johannes Ruof
    our server experienced a synflood attack and we used the csf firewall synflood settings to block it. Our server administrators also changed the IP of the server to a new one and blackholed the old IP. The attack went over and I changed the synflood settings back. However the server is still very slow, with a very low CPU usage and very low traffic on the website. Does anybody have an idea what might be causing this? The server is a CENTOS 6.4 x86_64 Thanks in advance, J. Ruof

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  • Configuring IP-aliasing on a CentOS Apache server

    - by Saif Bechan
    I am trying out a method to implement IP-aliasing on an Apache server. Host multiple SSL sites on a single network card with IP aliasing I have followed all the steps, but when I browse to my second domain I always end up in my primary domain. Have anyone tried this method and is this even possible?

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  • Is TCP/IP encapsulation MSB or LSB?

    - by Justin
    Application data sent over TCP experiences multiple encapsulations: The application data is encapsulated within one or many TCP fragments The TCP fragment is encapsulated within one or many IP datagrams The IP datagram is encapsulated within one or many Ethernet frames It turns out Ethernet frames are sent most-significant byte first, and within each byte, most-significant bit first. What about the multiple encapsulations? Are they performed MSB first or LSB first?

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  • How do I map an elastic IP to a domain, dont want to use Route 53

    - by Kaustubh P
    This is the first time I am doing this, so noob alert. I have an ec2 instance, to which I have assigned an elastic IP. I want to map this elastic IP to a webaddress foo.com, which I have bought from name.com. How do I do this? It would be very helpful if you you increase my vocabulary, and tell me the things involved, I dont know where to begin, SO has always been helpful! This is a screenshot of my name.com CP:

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  • How to get LAN ip to a variable in a Windows batch file

    - by Ville Koskinen
    I'm streaming audio from my Windows 7 laptop to a sound card attached to a router. I have a little batch script to start streaming. REM Kill any instances of vlc taskkill /im vlc.exe "c:\Program Files\VideoLAN\VLC\vlc.exe" <parameters to start http streaming> REM Wait for vlc TIMEOUT /T 10 REM start playback on router plink -ssh [email protected] -pw password killall -9 madplay plink -ssh [email protected] -pw password wget -q -O - http://192.1.159:8080/audio | madplay -Q --no-tty-control - & As you see the http stream is hard coded. It would be nice to get the address dynamically to reuse the script on other machines. Any ideas?

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  • Can't get my Raspberry Pi to keep a static IP

    - by JonnyIrving
    I recently got given a Raspberry Pi and I would like to be able to remote into it using puTTy from my laptop so I don't have to sit next to my tv with a keyboard and mouse to use it. I am able to get a puTTy session going when I know the IP address that my router has given the Pi on each session but it keeps changing on each reboot as I would expect. So I followed a number if instruction to go about configuring the RPi to keep a static IP address. This involved changing the file at '/etc/netwrok/interfaces' which now contains (password removed): auto lo iface lo inet loopback iface eth0 inet static address 192.168.1.82 netmask 255.255.255.0 gateway 192.168.1.254 auto wlan0 allow-hotplug wlan0 iface wlan0 inet dhcp wpa-ssid "BeBoxD304BF" wpa-psk "**********" Despite this however, each time I reboot my RPi it gives me a new dynamic IP address still. I also noticed that in the 'ifconfig' output below that the details of the eth0 doesn't contain IP details for inet addr, Bcast or Mask which have been present in all other examples I have seen online. eth0 Link encap:Ethernet HWaddr b8:27:eb:b5:95:da UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) wlan0 Link encap:Ethernet HWaddr 00:87:c6:00:33:77 inet addr:192.168.1.83 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:918 errors:0 dropped:0 overruns:0 frame:0 TX packets:277 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 Also I'm not sure if this is relevant but it can't hurt! The file at '/etc/resolv.conf' contains: domain config search config nameserver 192.168.1.254 ..I heard it might mean something on one of the pages I was looking at. I would be very grateful for any help with this. I have tried everything I can think of and would really like to get this working this weekend so I can use it from work.

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  • How to access localhost from by ip address?

    - by Malte Werschy
    I am trying to access localhost by my ip address. My ip address is/was http://217.164.79.62/ (It is set to be automatically assigned so it keeps changing). When I enter http://localhost/ into the browser I get the xampp homepage. However when I enter http://217.164.79.62/ into my browser I get the following message: The server 217.164.79.62:80 requires a username and password. User Name: Password: How do I get the username and password?

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  • Using IP Tables to deny packet patterns?

    - by Chris
    I'm not experienced with IP tables but it's something I'll be looking into if this is plausible. I'm looking to set up a system to inspect packets and look for a pattern similar to korek's chop chop attack. Is there a way to set up the IP tables to defend against this attack? Thanks

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  • Redirecting access from a domain name to IP:port

    - by hexacyanide
    Right now I have a server running on IP:Port. If I wanted to use DNS but redirect to the port, how would I do so? I've heard that it's possible, but how would I do so, even if it includes creating something such as a proxy? For example, visiting: domain.tld would instead access IP:Port and the port could be anything I wanted it to be. If no direct solution exist, how would I go along using a "VirtualHost"?

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  • IP address times out

    - by Werner
    I'm running a dedicated server with a couple of game servers running on 4 different IP addresses. The most network-heavy server times out a few times during peak hours and all other communication (FTP/SSH) through the same IP also briefly times out. Other servers using other IPs are fine and unaffected as well as FTP/SSH using other IPs. The server is running Debian 6. What causes this, and is there anything I can do?

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  • Godaddy : linking domain name to IP address

    - by Lokpere
    I just bought a domain name for my web site from GoDaddy. the content of the site is available at a public IP address. how do I link my domain name to the IP address ? how do I make it so that when someone types in my domain name, the content of the web server is displayed ? thanks.

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  • bad switchs duplicate my ip

    - by tacoen
    I had a large area LAN. There were many switch and AP on it, then somehow I couldn't ping my servers, and it's said that the IP was duplicated. I use arpwatch and found out that one of the switch flip-flop-ing the IP. I isolated that troublesome switch using his mac-address. But, since this a large area LAN... I doubt this will be the last cases. If there any software or hardware that I can use to prevent this kind of error? Sorry for my bad English.

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  • Find if IP Address is in use

    - by WedTM
    I'm trying to find if an IP address is in use. I don't want to rely on ping, as most of our hosts have ICMP echo and reply turned off. I'm looking for something that mimics window's "IP Address Conflict" detection. (How does this mechanism do it?)

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  • Fix static ip address problems in Ubuntu 10.04

    - by jane
    I used Network Manager in Ubuntu 10.04 to set a static ip address and assigned one that was already in use. Now my computer will not boot (nfs crashes). I booted from a live cd to change the configuration on the file system in /etc/network/interfaces but the file looks to be the default. Where does the network manager (the gui from system- preferences) store it's configuration so I can overwrite it and enter the correct ip addresss and have a happy working computer again. thanks!!

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  • IP not detected in terremark enteprise cloud server - how to install VMware on instance?

    - by JohnMerlino
    Using terremark enteprise cloud, when you create a server, you assigned an IP address to them and that IP is visible under Detected IP when selecting the server. However, I created a server, with IP address and I created an internet service and connected it with a node. I used protocol TCP and mapped it to port 3001. But I notice when I select my server, the IP address doesnt dsplay under Detected IP and then I VPN Connect, launch terminal and try to SSH with the IP to my server, and I get connection timed out. I presume the reason lies in that the IP address is not being detected. Someone suggested that my VMware-Tools is out of date and in fact on the server instance for VMware-Tools it does say "out of date". I'm not sure how to mount the instance and install VMware-Tools. I am using Mac OSX. Someone said that it will only work on PC running IE.

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  • Changing the IP address with a name [closed]

    - by fede
    I have a web server (xampp) in a particular PC running on my LAN, and I added the following line in the 'hosts' file : 127.0.0.1 mysite. Then, in another PC connected to the LAN, I'm trying to acces the previous web server by typing 'http://mysite/index.php' on the web browser, with no luck. But if I type the IP from the server computer (http://192.168.2.87/index.php) I am able to access the web site. So, what should i configure so when i type 'http://mysite/index.php' I get the same result as http:// 192.168.2.87/index.php ?? Thanx!

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  • If an visitors IP address contains "google" or a similar keyword, does this mean they were a crawler?

    - by Roscoe
    Hi, I have a huge list of IP addresses recorded from various visitors to a website. A huge amount of the visitors, in some months over 70%, came from IP addresses that contained keywords such as google, yahoo, bot, crawler, etc. Does this mean that those users were infact search engine crawlers? If so, why are their so many crawlers in my visitor records in comparison to genuine human visitors? (and if not what's the explanation?) Thanks in advance.

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  • C++ Linux getpeername IP family

    - by gln
    hi In my Linux C++ application I'm using getpeername in order to get the peer IP. my problem is: when I enable the IPv6 on my machine the IP I got from the peer is with family IF_INET6 although it is IPv4. code: int GetSockPeerIP( int sock) { struct sockaddr_storage ss; struct socklen_t salen = sizeof(ss); struct sockaddr *sa; memset(&ss,0,salen); sa = (sockaddr *)&ss; if(getpeername(sock,sa,&salen) != 0) { return -1; } char * ip=NULL: if(sa->sa_family == AF_INET) { ip = inet_ntoa((struct sockaddr_in *)sa)->sin_addr); } else { //ip = how to convert IPv6 to char IP? } return 0; } how can I fix it? thanks1

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  • Using Lan Management port - which kind of switch for remote control?

    - by zephyrus
    Hello everyone, I have no expertize in server hardware, however i have some IBM X3550 7978 and HP DL 160/G6 servers with 2 Lan ports, and a management port (that seem to be another Lan port). Have anyone tried to use the management to control remotely the low level functions of the servers (reboots for example) ? Which kind of switch or other devices have you used for this? thank you Massimiliano

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  • Whitelist IP from google-authenticator in sshd pam

    - by spudwaffle
    My Ubuntu 12.04 server uses the google-authenticator pam module to provide two step authentication for ssh. I need to make it so that a certain IP does not need to type the verification code. The /etc/pam.d/sshd file is below: # PAM configuration for the Secure Shell service # Read environment variables from /etc/environment and # /etc/security/pam_env.conf. auth required pam_env.so # [1] # In Debian 4.0 (etch), locale-related environment variables were moved to # /etc/default/locale, so read that as well. auth required pam_env.so envfile=/etc/default/locale # Standard Un*x authentication. @include common-auth # Disallow non-root logins when /etc/nologin exists. account required pam_nologin.so # Uncomment and edit /etc/security/access.conf if you need to set complex # access limits that are hard to express in sshd_config. # account required pam_access.so # Standard Un*x authorization. @include common-account # Standard Un*x session setup and teardown. @include common-session # Print the message of the day upon successful login. session optional pam_motd.so # [1] # Print the status of the user's mailbox upon successful login. session optional pam_mail.so standard noenv # [1] # Set up user limits from /etc/security/limits.conf. session required pam_limits.so # Set up SELinux capabilities (need modified pam) # session required pam_selinux.so multiple # Standard Un*x password updating. @include common-password auth required pam_google_authenticator.so I've already tried adding a auth sufficient pam_exec.so /etc/pam.d/ip.sh line above the google-authenticator line, but I can't understand how to check an IP adress in the bash script.

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