HOLOGRAPHICpizza's questions

I've just stopped all pretty much all services except sshd on my server (Ubuntu Server 10.04), and when I run iftop I get output that looks like this:

                 12.5Kb            25.0Kb           37.5Kb            50.0Kb      62.5Kb
└────────────────┴─────────────────┴────────────────┴─────────────────┴─────────────────
flash.gateway.2wire.net:ssh   <=> 172.16.1.151:60405             1.75Kb  1.54Kb  2.22Kb
flash.gateway.2wire.net:21095 <=> 69.127.29.20:32582              536b    107b     27b
flash.gateway.2wire.net:21095 <=> 190.164.122.134:13557             0b    105b     26b
flash.gateway.2wire.net:21095 <=> 79.165.212.195:45138              0b    105b     26b
flash.gateway.2wire.net:21095 <=> 151.42.15.151:9031                0b     72b     18b
flash.gateway.2wire.net:21095 <=> 88.185.120.179:51413              0b      0b     49b
flash.gateway.2wire.net:21095 <=> 178.120.152.97:25924              0b      0b     29b
flash.gateway.2wire.net:21095 <=> 109.110.217.77:27868              0b      0b     26b
flash.gateway.2wire.net:21095 <=> 84.13.201.90:16509                0b      0b     26b
flash.gateway.2wire.net:21095 <=> 171.7.125.224:11777               0b      0b     26b
flash.gateway.2wire.net:21095 <=> 115.177.164.170:21360             0b      0b     26b
flash.gateway.2wire.net:21095 <=> 50.88.126.18:25540                0b      0b     25b
flash.gateway.2wire.net:21095 <=> 223.206.230.163:13431             0b      0b     25b
flash.gateway.2wire.net:21095 <=> 78.144.187.26:24515               0b      0b     25b
flash.gateway.2wire.net:21095 <=> 83.20.61.211:27572                0b      0b     25b
flash.gateway.2wire.net:21095 <=> 82.134.151.42:18448               0b      0b     18b
flash.gateway.2wire.net:21095 <=> 126.117.95.247:25316              0b      0b     18b
flash.gateway.2wire.net:21095 <=> 116.202.65.230:9044               0b      0b     18b
flash.gateway.2wire.net:21095 <=> 88.120.63.205:51413               0b      0b     17b
────────────────────────────────────────────────────────────────────────────────────────
TX:             cumm:  61.6KB   peak:   8.00Kb          rates:   1.59Kb  1.38Kb  2.04Kb
RX:                    18.4KB           1.64Kb                    696b    549b    640b
TOTAL:                 80.0KB           9.64Kb                   2.27Kb  1.92Kb  2.66Kb

This is the first part (not the unix socket part) of the output of netstat -a:

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 *:ssh                   *:*                     LISTEN
tcp        0      0 *:55677                 *:*                     LISTEN
tcp        0      0 flash.gateway.2wire:ssh 172.16.1.151:60405      ESTABLISHED
tcp        0     48 flash.gateway.2wire:ssh 172.16.1.151:60661      ESTABLISHED
tcp6       0      0 [::]:ssh                [::]:*                  LISTEN
udp        0      0 *:37790                 *:*

What could all those strange connections on port 21095 be? And why would they not show up in netstat?? Any advice would be greatly appreciated.

I have a fresh installation of pure-ftpd on Ubuntu Server 12.04, and for the life of me I can't find any kind of central config file. All I need to do is set a passive port range. At this point I would settle with knowing its default passive port range (assuming it has one) so I can go change the firewall to match it. Any ideas?

We have two Buffalo WZR-HP-G300NH2 routers, with the default firmware, DD-WRT v24SP2-MULTI (10/31/11) std - build 17798. Each has a separate cable internet connection with a public static IP address. They are both in the 24.123.68.0/24 space.

Both of them can contact pretty much the whole internet, and they can both be accessed out on the internet with no problem, but for some reason they can't talk to each other! When I try to ping one from the other I always get "Destination Host Unreachable". There are no strange routing or firewall rules in place. And they are both set to respond to pings, I can ping them from outside.

Our main IT guy is going to call our ISP on Monday, but I'm impatient, so does anyone have any ideas?