Hello
I have a ftpd server box, OBSD-4.9, and pflog shows:
Aug 29 10:11:03.520900 rule 3/(match) pass in on rl0:
190.87.195.241.2732 > 192.168.5.2.21: S 2008995709:2008995709(0) win
65535 <mss 1452,nop,nop,sackOK>
Aug 29 10:15:52.825409 rule 3/(match) pass in on rl0:
190.87.195.241.3190 > 192.168.5.2.21: S 409025537:409025537(0) win
65535 <mss 1452,nop,nop,sackOK>
Aug 29 10:27:40.085461 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.2732: FP 2719210498:2719210554(56) ack 2008995823 win
17424 (DF) [tos 0x10]
Aug 29 10:28:44.085510 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.2732: FP 0:56(56) ack 1 win 17424 [tos 0x10]
Aug 29 10:29:48.085560 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.2732: FP 0:56(56) ack 1 win 17424 (DF) [tos 0x10]
Aug 29 10:30:52.085653 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.2732: FP 0:56(56) ack 1 win 17424 [tos 0x10]
Aug 29 10:31:56.085655 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.2732: FP 0:56(56) ack 1 win 17424 (DF) [tos 0x10]
Aug 29 10:32:29.475695 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.3190: FP 2719185758:2719185814(56) ack 409025651 win
17424 [tos 0x10]
Aug 29 10:33:00.085705 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.2732: FP 0:56(56) ack 1 win 17424 [tos 0x10]
Aug 29 10:33:33.475738 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.3190: FP 0:56(56) ack 1 win 17424 (DF) [tos 0x10]
Aug 29 10:34:04.085762 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.2732: FP 0:56(56) ack 1 win 17424 (DF) [tos 0x10]
Aug 29 10:34:37.475788 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.3190: FP 0:56(56) ack 1 win 17424 [tos 0x10]
Aug 29 10:35:08.085806 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.2732: R 57:57(0) ack 1 win 0 (DF) [tos 0x10]
Aug 29 10:35:41.475843 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.3190: FP 0:56(56) ack 1 win 17424 (DF) [tos 0x10]
Aug 29 10:36:45.475901 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.3190: FP 0:56(56) ack 1 win 17424 [tos 0x10]
Aug 29 10:37:49.475947 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.3190: FP 0:56(56) ack 1 win 17424 (DF) [tos 0x10]
Aug 29 10:38:53.476001 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.3190: FP 0:56(56) ack 1 win 17424 [tos 0x10]
Aug 29 10:39:57.476044 rule 1/(match) block out on rl0: 192.168.5.2.21
> 190.87.195.241.3190: R 57:57(0) ack 1 win 0 [tos 0x10]
pf rules are:
set skip on lo
block in log all
block out log all
pass out log quick on rl0
pass in log quick on rl0 proto tcp from any to port {20 21 22}
antispoof quick log for rl0
pass # to establish keep-state
It look for me, that somebody send code over port 21, then ftpd
respond over port 21, and pf stops sftp!
I have seen that normal behaviour of ftpd is logged on random ports;
as effect of ftp_proxy.
Is it happening something weird here?
Thanks so much.
