Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.

Questions tagged [icmpv6]

Internet Control Message Protocol version 6 (ICMPv6) is the implementation of the Internet Control Message Protocol (ICMP) for Internet Protocol version 6 (IPv6). ICMPv6 is defined in RFC 4443. ICMPv6 is an integral part of IPv6 and performs error reporting and diagnostic functions (e.g., ping).

Filter by
Sorted by
Tagged with
1
vote
1answer
54 views

Almost empty pf.conf still logs packets

I have an issue that my pf logs many packets that it's not supposed to log. I reproduced it with almost empty pf.conf: set skip on lo and it still logs some packets. I think that all those packets ...
0
votes
0answers
13 views

Confused with radvd RA message

On my Linux device, I am using radvd to send RA messages. I config one prefix in its config file (also assigned the correct address to my outgoing NIC). But RA message sent out contains, beside the ...
0
votes
1answer
59 views

Dynamic router advertising on IPv6

I have a problem that I'm hoping I can solve with IPv6 but since I haven't had a chance to try it yet I thought I'd propose my solution here. My problem is that we have a LAN with a number of devices ...
1
vote
0answers
48 views

Multiple routes from router advertisements

Consider the following simplified setup: All devices are IPv6 enabled. Interfaces are configured in a way that we have 3 networks as shown. Router advertisments are enabled on both routers R1 & ...
2
votes
1answer
37 views

Can I filter based on a ICMPv6 subtype?

I'm trying to filter out specific ICMPv6 packets and I tried looking at all the possible types options by using the following command: ip6tables -p icmpv6 -h This yields the following types (note ...
0
votes
1answer
85 views

ICMPv6 restrictive firewall: losing connectivity over time

The problem: Losing IPv6 connectivity to a remote IP after certain time period without establishing a connection to the remote IP. My setup: I'm running a server with ip6tables firewall that ...
1
vote
1answer
100 views

Is it common for DHCPv6 and RA to provide IPv6 addr in the same subnet?

For IPv6, both DHCP and RA (the "prefix information" option, with the A flag) can provide IPv6 addresses to hosts. I'm still confused if it's common for DHCPv6 and RA to provide IP addresses in the ...
2
votes
1answer
2k views

How to trigger IPv6 router solicitation on bridge slave port entering RUNNING state?

I have a small Linux system that runs a bridge br0 between its wired eth0 and wireless (AP mode) wlan0 network interfaces. For br0 I have enabled IPv6 (stateless) autoconfiguration; this is actually ...
-1
votes
1answer
913 views

Disable ICMPv6 Destination Unreachable replies

iptables -I OUTPUT -p icmp --icmp-type destination-unreachable -j DROP The above command works for IPv4, what should be the command for IPv6 to drop the ICMPv6 destination-unreachable packets. I have ...
3
votes
1answer
4k views

IPv6 - Allow incoming ICMP echo requests

So, we recently got our /48 prefix from our LIR, and started small-scale deploying it in a lab. What struck me as odd is that sites like http://ipv6-test.com/ insist that you allow incoming ICMP Echo ...
0
votes
1answer
284 views

Linux host does not retransmit with a lower packet size in response to ICMPv6 Packet Too Big message

I'm seeing this in Wireshark when curling this URL: On the same network, a Windows host retransmits properly, but an Android host does not. On a different network (presumably appropriately configured)...
0
votes
1answer
36 views

IPv6 dead before receiving ICMPv6 ping

TCPv6 and UPDv6 are dead until server received ICMPv6 ping. Further analysis shows that actually TCP and UDP packets won't even come to the server. But after receiving ICMPv6 ping, everything starts ...
0
votes
1answer
521 views

How to ping a host with different MTU size to simulate icmpv6 packet too big scenario?

As the Title states,I want to check whether my host will actually send a ICMPv6 packet too big if i send a packet with beyond the defined MTU size.I don't have a cisco router(extended ping) to try out ...
0
votes
1answer
1k views

Debian Wheezy doesn't answer to ICMPv6 neighbor solicitations

Hello, there. I manage some Wheezy servers with IPv6 enabled on all of them. They all have a global IPv6 /64 block using the first address in the block as the primary, i.e.: root@Host /h/david# ...
1
vote
2answers
2k views

IPv6 PPP Link fails forwarding Router Advertisements into local LAN

A Debian Server having eth0, eth1. eth2, ppp0 devices: 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether xx:yy:zz:yy:xx:yy brd ff:ff:ff:ff:...
1
vote
1answer
762 views

IPv6 radvd with vlans

Is it possible to configure the radvd config so that the router advertisement packets got a VLAN- tag? Theres a switch between my Router (software router, Ubuntu OS) and I only want some VLANs to ...
0
votes
1answer
93 views

Worldwide IP Latency [closed]

I want to create a simulation of the protocol MIPv6 (http://www.ietf.org/rfc/rfc3775.txt), for this reason I need information about latency, jitter and round-trip time. My first guess is install ...
0
votes
1answer
5k views

Multicast Listener Report Message v2

I run an ICMPv6 protocol and I have made a capture using wireshark. In the capture I have some Multicast Listener Report Message v2. Some of the has the source ip, the ipv6 link local address, but ...
7
votes
1answer
6k views

Advertise a subnet route with radvd

we have set up a small IPv6 Testing network. The setup looks like this: ::/0 +----------+ | Firewall | Router to the public net +----------+ | 2001:...::/106 | +---------...
0
votes
2answers
1k views

IPv6 connect B to A works, A to B fails with B's SYN-ACK receiving ICMP destination unreachable prohibited

I'm testing on IPv6. A is a server in a Cogent colo with native IPv6, call it 2001:db8:1111::1. B is a Mac mini behind an Airport Extreme router behind ISP Comcast; the router is set up to use ...
2
votes
2answers
1k views

Filtering IPv6 ICMPv6 messages

So I'm playing around with IPv6 on my home network a bit more, and I'm doing things a bit old-fashioned -- setting up static addresses and such. This means I don't really want or care for all the ...
3
votes
4answers
4k views

IPv6, multiple routers and possible bad prefix advertisement in ICMPv6 RA

I have two 'router' type devices setup on my network. One is my actual IPv6 router - a Cisco 2621 (fe80::xxxx:3e60). It's the correct default router. Another is a DLINK DIR-615 (fe80::xxxx:5760). It'...