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  • Using iptables to forward traffic destined for specific ip via specific interface

    - by shapeshifter
    I want to forward traffic destined for a specific ip from my internal network via a specific interface. I have two interfaces which are currently load balanced. I need all requests for a certain ip to go out via eth0 otherwise my external ip changes and sessions are dropped. eg. all requests from 10.1.1.1/24 to ip 11.22.33.44 on port 443 must go out via interface eth0. How can I do this with iptables?

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  • IPTABLES route, redirect, forwardc traffic

    - by Anthony
    I am trying to redirect traffic from one IP reached on a specific port to a website. For example I have two external ips, lets say 194.145.63.1 and 194.145.63.2 set on one network card as 194.145.63.1 - eth0 and 194.145.63.2 -eth0:1 mywebsite.com allows access only from 194.145.63.1 and I want to set my rules like if I hit http://194.145.63.2:8080 to open mywebsite.com trough 194.145.63.1. Thanks in advance!

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  • Redirect all outgoing traffic on port 80 to a different IP on the same server

    - by Spacedust
    I have multiple IP addresses on the same server and I would like to redirect all outgoing traffic on port 80 to a different IP on the same server just no to use always main IP. Currently I'm using this: /sbin/iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to-source IP; and it works well, but it redirects everything and when I make backups over SSH backup it's failing. System: CentOS 5.8 64-bit

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  • tc rules block traffic from some hosts at network

    - by user139430
    I have a problem I can not solve. The script, which sets the rules for traffic shaping is blocking the traffic from some hosts.If I remove all the rules, then it works. I can not understand why? Here is my script... #!/bin/sh cmdTC=/sbin/tc rateLANDl="60mbit" ceilLANDl="60mbit" rateLANUl="40mbit" ceilLANUl="40mbit" quantLAN="1514" # Nowaday bandwidth limit set to 100mbit. # We devide it with 60mbit download and 40mbit upload bandthes. rateHiDl="30mbit" ceilHiDl="60mbit" rateHiUl="20mbit" ceilHiUl="40mbit" quantHi="1514" rateLoDl="30mbit" ceilLoDl="60mbit" rateLoUl="20mbit" ceilLoUl="40mbit" quantLo="1514" devNIF=eth0 devFIF=ifb0 modprobe ifb ip link set $devFIF up 2>/dev/null #exit 0 ################################################################################################ # Remove discuiplines from network and fake interfaces ################################################################################################ $cmdTC qdisc del dev $devNIF root 2>/dev/null $cmdTC qdisc del dev $devFIF root 2>/dev/null $cmdTC qdisc del dev $devNIF ingress 2>/dev/null if [ "$1" = "down" ]; then exit 0 fi ################################################################################################ # Create discuiplines for network interface ################################################################################################ $cmdTC qdisc add dev $devNIF root handle 1:0 htb default 12 # Create classes for network interface $cmdTC class add dev $devNIF parent 1:0 classid 1:1 htb rate ${rateLANDl} ceil ${ceilLANDl} quantum ${quantLAN} $cmdTC class add dev $devNIF parent 1:1 classid 1:11 htb rate ${rateHiDl} ceil ${ceilHiDl} quantum ${quantHi} $cmdTC class add dev $devNIF parent 1:1 classid 1:12 htb rate ${rateLoDl} ceil ${ceilLoDl} quantum ${quantLo} $cmdTC qdisc add dev $devNIF parent 1:11 handle 111: sfq perturb 10 $cmdTC qdisc add dev $devNIF parent 1:12 handle 112: sfq perturb 10 # Create filters for network interface $cmdTC filter add dev $devNIF protocol all parent 1:0 u32 match ip dst 10.252.2.0/24 flowid 1:11 $cmdTC filter add dev $devNIF protocol all parent 111: handle 111 flow hash keys dst divisor 1024 baseclass 1:11 $cmdTC filter add dev $devNIF protocol all parent 112: handle 112 flow hash keys dst divisor 1024 baseclass 1:12 ################################################################################################ # Create discuiplines for fake interface ################################################################################################ $cmdTC qdisc add dev $devFIF root handle 1:0 htb default 12 # Create classes for network interface $cmdTC class add dev $devFIF parent 1:0 classid 1:1 htb rate ${rateLANUl} ceil ${ceilLANUl} quantum ${quantLAN} $cmdTC class add dev $devFIF parent 1:1 classid 1:11 htb rate ${rateHiUl} ceil ${ceilHiUl} quantum ${quantHi} $cmdTC class add dev $devFIF parent 1:1 classid 1:12 htb rate ${rateLoUl} ceil ${ceilLoUl} quantum ${quantLo} $cmdTC qdisc add dev $devFIF parent 1:11 handle 111: sfq perturb 10 $cmdTC qdisc add dev $devFIF parent 1:12 handle 112: sfq perturb 10 # Create filters for network interface $cmdTC filter add dev $devFIF protocol all parent 1:0 u32 match ip src 10.252.2.0/24 flowid 1:11 $cmdTC filter add dev $devFIF protocol all parent 111: handle 111 flow hash keys src divisor 1024 baseclass 1:11 $cmdTC filter add dev $devFIF protocol all parent 112: handle 112 flow hash keys src divisor 1024 baseclass 1:12 ################################################################################################ # Create redirect discuiplines from network to fake interface ################################################################################################ $cmdTC qdisc add dev $devNIF handle ffff:0 ingress $cmdTC filter add dev $devNIF parent ffff:0 protocol all u32 match u32 0 0 action mirred egress redirect dev $devFIF Here is my /etc/modules: loop ifb ppp_mppe nf_conntrack_pptp nt_conntrack_proto_gre nf_nat_pptp nf_nat_proto_gre The system is Linux wall 2.6.32-5-amd64 #1 SMP Sun Sep 23 10:07:46 UTC 2012 x86_64 GNU/Linux

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  • proxy RDP traffic through SOCKS5 proxy, using Windows

    - by ptrn
    I'm having bit of trouble. I have a server at school that's hosting a database. Normally I've been connecting to it through a VPN-connection, but earlier today it went down. I've checked with other people, and it's definitely down, so the fault's probably not at my end. Is there a way I can proxy RDP traffic through a SOCKS5 proxy?

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  • route http and ssh traffic normally, everything else via vpn tunnel

    - by Normadize
    I've read quite a bit and am close, I feel, and I'm pulling my hair out ... please help! I have an OpenVPN cliend whose server sets local routes and also changes the default gw (I know I can prevent that with --route-nopull). I'd like to have all outgoing http and ssh traffic via the local gw, and everything else via the vpn. Local IP is 192.168.1.6/24, gw 192.168.1.1. OpenVPN local IP is 10.102.1.6/32, gw 192.168.1.5 OpenVPN server is at {OPENVPN_SERVER_IP} Here's the route table after openvpn connection: # ip route show table main 0.0.0.0/1 via 10.102.1.5 dev tun0 default via 192.168.1.1 dev eth0 proto static 10.102.1.1 via 10.102.1.5 dev tun0 10.102.1.5 dev tun0 proto kernel scope link src 10.102.1.6 {OPENVPN_SERVER_IP} via 192.168.1.1 dev eth0 128.0.0.0/1 via 10.102.1.5 dev tun0 169.254.0.0/16 dev eth0 scope link metric 1000 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.6 metric 1 This makes all packets go via to the VPN tunnel except those destined for 192.168.1.0/24. Doing wget -qO- http://echoip.org shows the vpn server's address, as expected, the packets have 10.102.1.6 as source address (the vpn local ip), and are routed via tun0 ... as reported by tcpdump -i tun0 (tcpdump -i eth0 sees none of this traffic). What I tried was: create a 2nd routing table holding the 192.168.1.6/24 routing info (copied from the main table above) add an iptables -t mangle -I PREROUTING rule to mark packets destined for port 80 add an ip rule to match on the mangled packet and point it to the 2nd routing table add an ip rule for to 192.168.1.6 and from 192.168.1.6 to point to the 2nd routing table (though this is superfluous) changed the ipv4 filter validation to none in net.ipv4.conf.tun0.rp_filter=0 and net.ipv4.conf.eth0.rp_filter=0 I also tried an iptables mangle output rule, iptables nat prerouting rule. It still fails and I'm not sure what I'm missing: iptables mangle prerouting: packet still goes via vpn iptables mangle output: packet times out Is it not the case that to achieve what I want, then when doing wget http://echoip.org I should change the packet's source address to 192.168.1.6 before routing it off? But if I do that, the response from the http server would be routed back to 192.168.1.6 and wget would not see it as it is still bound to tun0 (the vpn interface)? Can a kind soul please help? What commands would you execute after the openvpn connects to achieve what I want? Looking forward to hair regrowth ...

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  • Redirect all traffic to specified hosts behind NAT

    - by biesiad
    Is there a possibility to redirect all traffic to specified hosts behind NAT? For example i have a server, a domain "mydomain.com" and 3 hosts behind NAT. I wish to configure 3 subdomains: host1.mydomain.com host2.mydomain.com host2.mydomain.com and each of them to redirect all ports to specified host in local net. That redirection should provide funcionality like this: http://host1.mydomain.com (can be achieved using apache) ssh [email protected] (???) and other protocols on diferent ports Thanks for any help.

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  • Secure linux distro that sends traffic through Tor

    - by gravestone
    I'm looking for a live Linux distro that is secure and preserves my anonymity online. For what I need, Tor seems to do the job – but such software requires configuration that someone who is not knowledgeable in how it works might find difficult. I was looking at 'Lightweight portable security' but it does not specify whether it sends all traffic through Tor. Does anyone know more information about it and/or any other such live Linux distro?

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  • isa 2006 blocks outgoing traffic with no rule specified

    - by codesnik
    I've created a rule near the top, allowing all outgoing traffic from "All Users" from specified IP range to external network. However, connections are blocked sometimes for no apparent reason. For example, one attempt to ssh to an external server would fail, and another immediatelly after that - won't. to the same server! logging shows thoose failed connections as denied, but "rule" column is blank. any suggestions?

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  • Restrict traffic to local network and VPN using ufw or iptables

    - by Piezo Pea
    I want to restrict all traffic from my ubuntu-machine to come or go from the local network (eth0) or from or to my VPN (tun0). It should be possible to connect the router in the local network but not possible to leave the local network not using the VPN. Since i have no experience with iptables and i couldn't find some how-to i tried ufw but i did not succeed. Thank you for some hints or code snippets how to come closer!

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  • forward outbound traffic rule

    - by Claudiu
    I am trying to forward the outbound traffic to another server. Current rule is: /sbin/iptables -A OUTPUT -p tcp -s localhost -o 91.xxx.xxx.xxx --dport 65000:65010 -j ACCEPT but when I do a iptables -L, the rule its showed like this: ACCEPT tcp -- localhost.localdomain anywhere tcp dpts:65000:65010 So I guess my rule is bad written since the "destination" column shows "anywhere" Can you help me with this?

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  • iptables rule for forwarding outbound traffic

    - by Claudiu
    I am trying to forward the outbound traffic to another server. Current rule is: /sbin/iptables -A OUTPUT -p tcp -s localhost -o 91.xxx.xxx.xxx --dport 65000:65010 -j ACCEPT but when I do a iptables -L, the rule its showed like this: ACCEPT tcp -- localhost.localdomain anywhere tcp dpts:65000:65010 So I guess my rule is bad written since the "destination" column shows "anywhere" Can you help me with this?

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  • Best Website Statistics tool for Drupal

    - by Olav
    What is the best free Website statistics setup I can have for Drupal 6 on Apache? Particularities: 1. Multisite install. Might want to look over several sites. Should be able to restrict view for clients to their own site. Some hits are bypassing Drupal. Some urls are not public. Some sites have little traffic, it would be nice to be able to exclude "own" traffic. Logged in users are not so important (It seems Google Analytics is popular)

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  • Inconsistent values in network switch throughput values

    - by Marcus Hughes
    Quite simple, I have a network switch with SNMP, and need to calculate the throughput of the switch port, so simply I use ifOutOctets. We transfer a file which is 145MB and if we use the total from the start, subtracted from the value at the end then the value is : 158901842 I simply can't get the value to match, or be anything similar to what the real transfer is. I understand that there may be excess traffic etc but I just can't get it to be anywhere similar (the server being tested has no traffic when this is not running) We have tried for a long time and suspect there may be an issue with the recording on the HP switch, do you have any suggestions, or how should we be calculating it? Thanks a lot in advance We have a HP ProCurve 1810G on 2.2

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  • How to prevent Google Website Optimizer from making Google Analytics spike Direct Traffic and lower Bounce Rate?

    - by Scott
    I am using Google Website Optimizer (GWO) and Google Analytics. Whenever a person (Google Website Optimizer) does a javascript redirect, Google Analytics will change the referrer. When the referrer changes, the traffic source becomes yourself and is changed to Direct Traffic. For Example: A visitor goes to google: searches for my great service. Clicks the link that goes to website page: /home/ At this point, Google Analytics tracks the referrer as Google. However, /home/ has a GWO javacript redirect to a battery of A/B tests. /home-1/ or /home-2/ or /home-3/ When the redirect from /home/ occurs to /home-1/, google analytics on the /home-1/ page now thinks the referrer is yourself and converts the referrer to Direct Traffic since the Direct Traffic bucket is the unknown. I'm really surprised that GWO and GA do this when they both come from google. Now, How does one fix this to prevent the overwrite of the referrer using GWO?

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  • Apache lance Traffic Server 3.0 et booste davantage les performances de son serveur Proxy qui arrive sur Mac OS X, Solaris et FreeBSD

    Apache lance Traffic Server 3.0 et booste davantage les performances De son serveur Proxy qui arrive sur Mac OS X, Solaris et FreeBSD Une nouvelle version du serveur Apache Traffic vient de voir le jour, pouvant gérer jusqu'à 220.000 requêtes par seconde, soit un gain de performances considérable de 277 % par rapport à la version 2.0. Apache Traffic Server 3.0 est la première version majeure depuis que le projet a quitté le programme d'incubation, et devenu une priorité de la fondation Apache après lui avoir été cédé par Yahoo! fin 2009. Traffic Server est destiné à gérer les requêtes Web sortantes et entrantes en délivrant directement les contenus statiques (images...

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  • Use htaccess to redirect all traffic from subdomain to domain without maintaining directory structur

    - by hal10001
    Most examples show how to redirect all subdomain traffic to a primary domain, maintaining the directory structure. I actually don't want this. I want to redirect all subdomain traffic (the site is going away) to the primary domain. This is not working: Options +FollowSymLinks RewriteEngine on RewriteRule (.*) http://www.newdomain.com/ [R=301,L] What happens, is if you go to this: http://sub.newdomain.com/some/path/ You get this: http://www.newdomain.com/some/path/ I want it all to go to the root.

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  • pfSense with two WANs, routing skype traffic over a specific WAN

    - by Eric
    I have a pfSense setup with two WANs (WAN1 and WAN2) and one LAN network. The two WANs are setup for failover. However, QoS has recently been an issue for skype calls in our office place (about 30 people) so we want to dedicate WAN2 for skype traffic (we use skype for all voip calls, etc.) As Skype is notoriously difficult to deal with, does anyone have any suggestions on how I should deal with this? A simple rile based on ports will not work, and using layer7 inspection witha skype porfile on all incoming LAN packets doesn't seem like the way to go eiter. here is a related pfsense forum post: http://forum.pfsense.org/index.php/topic,50406.msg268520.html#msg268520

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  • Routing all Traffic through OpenVPN Tunnel

    - by Filip Ekberg
    I have installed OpenVPN server on Archlinux and am now using OpenVPN GUI on Windows 7, I can talk to other computers connected through the VPN but I have not yet figured out how to route all traffic through the tunnel. How do I do this? I figured I need to do it with route ( cmd command ) but I think i need some pointers here. I've followed the OpenVPN HowTo on the matter but that doesn't work, it simply doesn't push the "force the client to go through this gateway"-option. And changing from OpenVPN to a PPTP / IPSec alternative is not an option at the moment.

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  • CORAID using only 1 of the 2 available NICs for AoE traffic

    - by Peter Carrero
    We got 6 CORAID shelves in my workplace. On 2 of them I see AoE traffic on only 1 of the 2 NICs that are attached to the SAN switch. We got jumbo frames enabled on all devices. Both NICs show up when I issue the aoe-interfaces command. This wouldn't bother me too much if the throughput performance observed on the "bad" shelves using bonnie++ wasn't half of the result of the "good" shelves. The "good" shelves are older SR1521 model and they have ReiserFS on their LUNS - not that I think it makes a difference - and the "bad" shelves are newer SR2421 model and have JFS. Any help as to what is going on and how to rectify this would be greatly appreciated. BTW: even the lower performing shelves outperform another iSCSI device we got, but that is another story... Thanks.

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  • Gauge network traffic for each Citrix session

    - by molecule
    Hi all, We are currently reviewing the bandwidth of our WAN links. How much bandwidth does a "typical" Citrix session utilize over a WAN link? JFYI - we are using Citrix Program Neighborhood V10 and each session is configured to use 256 colors. I have set up PRTG and it appears that for a server hosting 4 users, the traffic is approximately 100k to 300k per session. Is that about right? If you had to set a benchmark on a per-user basis, how much bandwidth would you assign to each user? Thanks in advance.

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  • tcpdump filter that excludes private ip traffic

    - by Kyle Brandt
    For a generic filter to exclude all traffic in my dump that is between private IP address, I came up with the following: sudo tcpdump -n ' (not ( (src net 172.16.0.0/20 or src net 10.0.0.0/8 or src net 192.168.0.0/16) and (dst net 172.16.0.0/20 or dst net 10.0.0.0/8 or dst net 192.168.0.0/16) ) ) and (not ( (dst net 172.16.0.0/20 or dst net 10.0.0.0/8 or dst net 192.168.0.0/16) and (src net 172.16.0.0/20 or src net 10.0.0.0/8 or src net 192.168.0.0/16) ) )' -w test2.dump Seems pretty excessive, but it also seems to work, is this filter a lot longer than it needs to be and there is better way to express this logic, or is there anything wrong with the filter?

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