DSM-G600, DNS-3xx and NSA-220 Hack Forum

Loose Gravel · 2008-11-25 23:21:53

Today a disabled the internet connection on my router. Later on I noticed today lsof on the DNS-323 took a long time to execute. After reestablishing the internet connection lsof is completed within seconds.

I looked into it and found that op_server has opened a connection to ALL-SYSTEMS.MCAST.NET Port 13579. Why is that? I'm not downloading anything (never used that feature)

Output lsof | grep op_server

Code:

op_server  1602    root  cwd       DIR        1,0    1024          2 /
op_server  1602    root  rtd       DIR        1,0    1024          2 /
op_server  1602    root  txt       REG        7,0   53392    4551396 /sys/crfs/sbin/op_server
op_server  1602    root  mem       REG        1,0   19492       1422 /lib/ld-uClibc-0.9.28.so
op_server  1602    root  mem       REG        1,0   28724       1419 /lib/libconfuse.0.0.0
op_server  1602    root  mem       REG        1,0   10196       1423 /lib/libcrypt-0.9.28.so
op_server  1602    root  mem       REG        1,0  312136       1424 /lib/libuClibc-0.9.28.so
op_server  1602    root  mem       REG        1,0   37580       1432 /lib/libgcc_s.so.1
op_server  1602    root    0r      CHR        1,3                 79 /dev/null
op_server  1602    root    1u      CHR       4,64                164 /dev/ttyS0
op_server  1602    root    2u      CHR       4,64                164 /dev/ttyS0
op_server  1602    root    3u     sock        0,4               1454 can't identify protocol
op_server  1602    root    4u     IPv4       1455                UDP ALL-SYSTEMS.MCAST.NET:13579

What's going on here?

Thanks
Loose Gravel

KRH · 2008-11-25 23:38:10

http://korturl.dk/v5x

I relly like where the 2. link points to.

Loose Gravel · 2008-11-26 00:12:12

KRH wrote:
http://korturl.dk/v5x

I relly like where the 2. link points to.

Ok, google is my friend.

So I do not have to worry, because it is local multicast? But where does it come from? And why is lsof blocked when there is no internet connection - which is definitly not my local net?

Maybe I didn't get it - sorry for that.

oxygen · 2008-11-27 16:33:55

Loose Gravel wrote:
So I do not have to worry, because it is local multicast? But where does it come from?

It's used for upnp and bonjour.

And why is lsof blocked when there is no internet connection - which is definitly not my local net?

Because the name resolution does not work then.

DSM-G600, DNS-3xx and NSA-220 Hack Forum

Announcement

#1 2008-11-25 23:21:53

Open connection to ALL-SYSTEMS.MCAST.NET?

Code:

#2 2008-11-25 23:38:10

Re: Open connection to ALL-SYSTEMS.MCAST.NET?

#3 2008-11-26 00:12:12

Re: Open connection to ALL-SYSTEMS.MCAST.NET?

KRH wrote:

#4 2008-11-27 16:33:55

Re: Open connection to ALL-SYSTEMS.MCAST.NET?

Loose Gravel wrote:

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