ypmatch suddenly uses unprivileged port for master.passwd

Palle Girgensohn girgen at pingpong.net
Wed Nov 16 13:57:02 GMT 2005


Hi!

All of a sudden, our ypwhich uses an unprivileged port when accessing 
master.passwd, and of course, it does not get any results:

# ypmatch girgen master.passwd
ypmatch: can't match key girgen in map master.passwd.byname. reason: YP 
server error

messages:
Nov 16 14:51:13 banan ypserv[164]: access to master.passwd.byname denied -- 
client 192.168.1.184:2165 not privileged


tcpdump:

14:12:56.909459 banan.pingpong.net.2425 > banan.pingpong.net.972: udp 88
0x0000   4500 0074 ee7f 0000 4011 0739 c0a8 01b8        E..t.... at ..9....
0x0010   c0a8 01b8 0979 03cc 0060 51f1 4c72 f0c8        .....y...`Q.Lr..
0x0020   0000 0000 0000 0002 0001 86a4 0000 0002        ................
0x0030   0000 0003 0000 0000 0000 0000 0000 0000        ................
0x0040   0000 0000 0000 0005 4d75 7369 6b00 0000        ........Musik...
0x0050   0000 0014 6d61 7374 6572 2e70 6173 7377        ....master.passw
0x0060   642e 6279 6e61 6d65 0000 0006 6769 7267        d.byname....girg
0x0070   656e 0000                                      en..
14:12:56.909917 banan.pingpong.net.972 > banan.pingpong.net.2425: udp 32
0x0000   4500 003c ee80 0000 4011 0770 c0a8 01b8        E..<.... at ..p....
0x0010   c0a8 01b8 03cc 0979 0028 3061 4c72 f0c8        .......y.(0aLr..
0x0020   0000 0001 0000 0000 0000 0000 0000 0000        ................
0x0030   0000 0000 ffff fffa 0000 0000                  ............


No maps where changed, I honestly don't have a clue as to to why this 
happened. Any ideas?

/Palle



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