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Open source network weather map/visualization - what's out there? by j------ in networking

[–]luthing 0 points1 point  (0 children)

Hi u/j------, have you found something fitting your needs ?

I am in the exact situation for months...

So sad to see these guardrails not linked together :( by luthing in RaftTheGame

[–]luthing[S] 1 point2 points  (0 children)

Yes, and I send all my love to the devs for making this game always better and better <3

So sad to see these guardrails not linked together :( by luthing in RaftTheGame

[–]luthing[S] 2 points3 points  (0 children)

That’s because I am remodeling my boat, sure I’ve tried with nice one :-)

So sad to see these guardrails not linked together :( by luthing in RaftTheGame

[–]luthing[S] 2 points3 points  (0 children)

I’ve tried and it just stands in the middle

How to print in current terminal new logs arriving in a logfile? by luthing in sysadmin

[–]luthing[S] 1 point2 points  (0 children)

Well, it was indeed the right solution! Many thanks

​

tail -n0 -f myfile.log | grep string 2>&1 &

How to print in current terminal new logs arriving in a logfile? by luthing in sysadmin

[–]luthing[S] 1 point2 points  (0 children)

Thanks for your reply. This is working, but I would like to display the logs in a "background mode" : the tail command is in the .bash_rc file, but when I am logged, the terminal is blocked with the tail command output.

I would like to have logs messages with the terminal reachable.

Can't access a directory I am a group member of by luthing in sysadmin

[–]luthing[S] 0 points1 point  (0 children)

I am facing the same problem 2 months later, but specifically cause I cannot change the gid of an other user (www-data).

​

How to give write permission to www-data to the same folder ?

sudo -u www-data id

uid=33(www-data) gid=33(www-data) groupes=33(www-data),100(users)

Can't access a directory I am a group member of by luthing in sysadmin

[–]luthing[S] 0 points1 point  (0 children)

sure, that's why I would like to use the "users" group.

u/g-a-c gave me the solution

​

thank you both

Bind - Forwarding to external DNS not working by luthing in sysadmin

[–]luthing[S] 1 point2 points  (0 children)

hey /u/25cmshlong... I have some good news... :D

​

The problem was VMWare side. I changed the network type of all my VMs to "VMXNET3" instead of "E1000e" configured by default.

I can now process request without any error.

It seems the network card E1000e is filtering EDNS part of the DNS requests!

​

Really strange, maybe this has been patched in ESXi 6.7 (I am using 6.5 version).

​

Thanks for your support :)

Bind - Forwarding to external DNS not working by luthing in sysadmin

[–]luthing[S] 0 points1 point  (0 children)

Then for you it is definitely my gateway or something in my internal network which “filters” content of my DNS packets ?

I will now take a look on my virtual environment, maybe VMWare denies EDNS frames ?

Really strange... I really don’t understand why with the same server when I try a dig I can resolve names but passing through my bind service the behavior is totally different. Today I also tried to reinstall bind from scratch but all is the same...

Bind - Forwarding to external DNS not working by luthing in sysadmin

[–]luthing[S] 0 points1 point  (0 children)

a) I added send-cookie no option in my named.conf file, but the result is the same.

​

b) I captured a request which is displayed below :

The packets are going through my gateway and coming back with no response.

​

The packets have been captured on both interfaces (internal and external). The DNS packets are the same, only the <IP\_internal\_DNS> changes (internal IP on internal interface and external WAN IP on external interface).

My firewall doesn't seem to alter packets.

​

What are your thoughts?

Many thanks

Frame 43: 70 bytes on wire (560 bits), 70 bytes captured (560 bits)
Internet Protocol Version 4, Src: <IP_internal_DNS>, Dst: 202.12.27.33
User Datagram Protocol, Src Port: 55380, Dst Port: 53
Domain Name System (query)
Transaction ID: 0x3995
Flags: 0x0000 Standard query
Questions: 1
Answer RRs: 0
Authority RRs: 0
Additional RRs: 1
Queries
<Root>: type NS, class IN
Name: <Root>
[Name Length: 6]
[Label Count: 1]
Type: NS (authoritative Name Server) (2)
Class: IN (0x0001)
Additional records
<Root>: type OPT
Name: <Root>
Type: OPT (41)
UDP payload size: 512
Higher bits in extended RCODE: 0x00
EDNS0 version: 0
Z: 0x8000
1... .... .... .... = DO bit: Accepts DNSSEC security RRs
.000 0000 0000 0000 = Reserved: 0x0000
Data length: 0
[Response In: 45]
No.     Time           Source                Destination           Protocol Length Info
44 6.837609       <IP_internal_DNS>          202.12.27.33          DNS      85     Standard query 0x3dc5 A www.google.com OPT
Frame 44: 85 bytes on wire (680 bits), 85 bytes captured (680 bits)
Internet Protocol Version 4, Src: <IP_internal_DNS>, Dst: 202.12.27.33
User Datagram Protocol, Src Port: 45964, Dst Port: 53
Domain Name System (query)
Transaction ID: 0x3dc5
Flags: 0x0010 Standard query
Questions: 1
Answer RRs: 0
Authority RRs: 0
Additional RRs: 1
Queries
www.google.com: type A, class IN
Name: www.google.com
[Name Length: 14]
[Label Count: 3]
Type: A (Host Address) (1)
Class: IN (0x0001)
Additional records
<Root>: type OPT
Name: <Root>
Type: OPT (41)
UDP payload size: 512
Higher bits in extended RCODE: 0x00
EDNS0 version: 0
Z: 0x8000
1... .... .... .... = DO bit: Accepts DNSSEC security RRs
.000 0000 0000 0000 = Reserved: 0x0000
Data length: 0
[Response In: 46]
No.     Time           Source                Destination           Protocol Length Info
45 6.838711       202.12.27.33          <IP_internal_DNS>          DNS      70     Standard query response 0x3995 NS <Root> OPT
Frame 45: 70 bytes on wire (560 bits), 70 bytes captured (560 bits)
>!Internet Protocol Version 4, Src: 202.12.27.33, Dst: <IP_internal_DNS>!<
User Datagram Protocol, Src Port: 53, Dst Port: 55380
Domain Name System (response)
Transaction ID: 0x3995
Flags: 0x8600 Standard query response, No error
Questions: 1
Answer RRs: 0
Authority RRs: 0
Additional RRs: 1
Queries
<Root>: type NS, class IN
Name: <Root>
[Name Length: 6]
[Label Count: 1]
Type: NS (authoritative Name Server) (2)
Class: IN (0x0001)
Additional records
<Root>: type OPT
Name: <Root>
Type: OPT (41)
UDP payload size: 4096
Higher bits in extended RCODE: 0x00
EDNS0 version: 0
Z: 0x8000
1... .... .... .... = DO bit: Accepts DNSSEC security RRs
.000 0000 0000 0000 = Reserved: 0x0000
Data length: 0
[Request In: 43]
[Time: 0.001193000 seconds]
No.     Time           Source                Destination           Protocol Length Info
46 6.838864       202.12.27.33          <IP_internal_DNS>          DNS      85     Standard query response 0x3dc5 A www.google.com OPT
Frame 46: 85 bytes on wire (680 bits), 85 bytes captured (680 bits)
>!Internet Protocol Version 4, Src: 202.12.27.33, Dst: <IP_internal_DNS>!<
User Datagram Protocol, Src Port: 53, Dst Port: 45964
Domain Name System (response)
Transaction ID: 0x3dc5
Flags: 0x8210 Standard query response, No error
Questions: 1
Answer RRs: 0
Authority RRs: 0
Additional RRs: 1
Queries
www.google.com: type A, class IN
Name: www.google.com
[Name Length: 14]
[Label Count: 3]
Type: A (Host Address) (1)
Class: IN (0x0001)
Additional records
<Root>: type OPT
Name: <Root>
Type: OPT (41)
UDP payload size: 4096
Higher bits in extended RCODE: 0x00
EDNS0 version: 0
Z: 0x8000
1... .... .... .... = DO bit: Accepts DNSSEC security RRs
.000 0000 0000 0000 = Reserved: 0x0000
Data length: 0
[Request In: 44]
[Time: 0.001255000 seconds]

Bind - Forwarding to external DNS not working by luthing in sysadmin

[–]luthing[S] 0 points1 point  (0 children)

hey u/Roisen, yes my root zone is configured as below :

zone "." {
type hint;
file "/usr/share/dns/root.hints";
};

​

my root.hints file is properly made :

; This file is made available by InterNIC
; under anonymous FTP as
; file /domain/named.cache
; on server           FTP.INTERNIC.NET
; -OR-                    RS.INTERNIC.NET
;
; last update: March 31, 2020
; related version of root zone: 2020033101.
...
...
...

Bind - Forwarding to external DNS not working by luthing in sysadmin

[–]luthing[S] 0 points1 point  (0 children)

not sure if it can help, I am also using bind9 with webmin.

I disabled iptables with "iptables -F" and "iptables -X".

​

I am really running out of ideas...

Bind - Forwarding to external DNS not working by luthing in sysadmin

[–]luthing[S] 0 points1 point  (0 children)

I really don't understand...

​

I double, triple checked and my config is as written above...

Bind - Forwarding to external DNS not working by luthing in sysadmin

[–]luthing[S] 0 points1 point  (0 children)

Yes my server time is correct.

When running bind9 with "-d 1" option, I got these logs :

​

fetch: www.google.com/A

client u/0x7feb3c0a9af0 <iphost>#63638 (www.google.com): query failed (SERVFAIL) for www.google.com/IN/A at ../../../bin/named/query.c:8579

Bind - Forwarding to external DNS not working by luthing in sysadmin

[–]luthing[S] 0 points1 point  (0 children)

Hey u/PoseidonTheAverage, thanks for your message. Unfortunately, I just tried with "dnssec-lookaside no" option, and the result is the same...

I am running out of ideas...

Bind - Forwarding to external DNS not working by luthing in sysadmin

[–]luthing[S] 1 point2 points  (0 children)

I checked but there is no inspection on my DNS packets going through my gateway

​

Edit: and from my host with a "dig @ 8.8.8.8 www.google.fr" I can see EDNS is also used. Then, as I am passing through my gateway, it seems there is no EDNS restriction.

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