Browsing articles tagged with "routing - Admins Goodies"
Jan 30, 2013
tom

Multi-WAN bonding across different media

I’ve recently been thinking again about a product that Viprinet provide, basically they’ve got a pair of routers, one that lives in a datacentre, Their VPN Multichannel Hub and the on-site hardware, their VPN multichannel routers They’ve also got a bunch of interface cards (like HWICs) for 3G, UMTS, Ethernet, ADSL and ISDN adapters. Their main spiel seems to be bonding across different media. It’s something that I’d really like to use for a couple […]

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Jan 25, 2013
tom

Static route without knowing the nexthop (linux)

I have an eth3 interface in a linux router, with an adsl modem. This adsl modem is in bridged mode, so the public IP is assigned to eth3 (say 11.22.33.44), and the modem is just not seen by my server. I want to define a static route to a specific IP (88.191.250.176) through eth3, but I don’t have a nexthop to set: ip route add 88.191.250.176 dev eth3 is accepted but does not work (packets […]

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Jan 10, 2013
tom

Exchange 2010 – Send Connectors

I understand in Exchange 2010 in order to send out to the big bad Internet you require to configure a send connector to allow SMTP to *, or to your smart host etc. My question is how does Exchange 2010 handle mail being delivered interally, i.e. to a another mailbox within Exchange, is there a send connector for this? Separate Queues in Queue Viewer for internal mail etc? Thanks! Asked by TheD Send connectors are […]

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Dec 19, 2012
tom

What is a multi-homed situation? [closed]

I am revising for my networks exam in Jan and I am currently looking at autonomous systems. Can anyone provide me with a for dummies explanation of what a multi-homed situation is? Asked by Stuart Blackler Edit: In the case of autonomous systems, multi-homed means that a system is connected to more than one other autonomous system, usually for resilience. This Wikipedia article covers it. A multihomed Autonomous System is an AS that maintains connections […]

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Dec 13, 2012
tom

Is it possible to include switches in traceroute hops?

I was wondering if it’s at all possible to make a Dell Powerconnect 2848 switch show when running internal traceroutes. This would help with diagnosing issues and make it far easier to see where issues occur. According to the datasheet, this particular switch is Layer 2 and 3 aware. I’m not completely sure what that means. Is this possible? Asked by dannymcc No. The hops shown by traceroute show the path that an IP packet […]

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Dec 5, 2012
tom

Linux: Three default gateways?

My server has three default gateways, how can that be? Shouldn’t there be one default gw? I have three NICs, each attached to a separate subnet: server1:~# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.5.0.0 * 255.255.255.224 U 0 0 0 eth3 localnet * 255.255.255.224 U 0 0 0 eth0 192.168.8.0 * 255.255.255.192 U 0 0 0 eth1 default 10.5.0.1 0.0.0.0 UG 0 0 0 eth3 default 192.168.8.1 0.0.0.0 […]

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Oct 29, 2012
tom

Using a nat rule to translate 80/443 traffic to web server, but internal users cannot access it using external ip/domain name

I am using Cisco ASDM for ASA I have my internal network called soa. My outside interface is called outside. Let’s say my outside IP given to me by my ISP isp is y.y.y.y I have a web server inside my network with a static ip of x.x.x.110. I have configured 2 static nat rules (one for http the other for https). Source is x.x.x.110. Interface is outside, service (http or https). Maybe I am […]

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Oct 26, 2012
tom

Cisco Redirect traffic to an interface

I have a Cisco 2901 with 2 internet WAN connections, one it have a static public ip, and the other one have a ftth dial connection. I have already both configured but what i need is the following: Currently: Internet_connection_1 (static ip) as a default route ip route 0.0.0.0 0.0.0.0 public_ip What i need: Use the ftth internet connection (connected in Gi0/0) to ONLY access some services, ex: clud_server_ip How i redirect the traffic, so […]

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Oct 14, 2012
tom

Linux: Route subfolder to different port

I have setup a JIRA instance and it now listens on http://mydomain.com:8080 Now I want to expose it like http://mydomain.com/jira Can I do this with linux tools (iptables …) alone (and how) or do I need a web server? Thanks for every answer to a newbie in the linux world Asked by heinob You can change port numbers using iptables like redirecting traffic from port 8080 to port 80. However, you need to have an […]

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Oct 14, 2012
tom

custom route not working on windows

My windows laptop is directly connected to 192.168.1.0/24 (wireless lan). I access 10.21.0.0/16 though a router that is connected to both networks. The routing works fine with this configuration. I have a VPN, that connects to 10.0.0.0/8. The VPN network doesn’t actually use any IPs in the 10.21.0.0/16 range. So I should be able to configure my routing table to route all the 10.21.0.0/16 IPs through the wireless lan, and all other 10.0.0.0/8 through the […]

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