Андрей писал(а):А можно ли это сделать средствами mpd5?
Или все же только pf?
ограничить пропускную способность можно не одним способом
что бы ответить на твой вопрос, опять же нужно открыть мануал и почитать его, например:
RADIUS ACL's
Mpd can use the Access Control Lists (ACLs) given by the RADIUS server. This ACLs may include ipfw rules, pipes, queues and tables and also mpd internal traffic filtering/shaping/limiting features. That two sets are redundant. ipfw proposed as standard and universal solution, while internal filter/shaper/limiter based on ng_bpf+ng_car expected to work faster with big number of active links.
ipfw
You can write in your RADIUS configuration something like:
mpd-table += "1=10.0.0.1",
mpd-table += "1=10.0.0.15",
mpd-pipe += "1=bw 10Kbyte/s",
mpd-pipe += "5=bw 20Kbyte/s",
mpd-rule += "1=pipe %p1 all from any to table\\(%t1\\) in",
mpd-rule += "2=pipe %p5 all from table\\(%t1\\) to any out",
mpd-rule += "100=allow all from any to any",
When mpd receives these parameters it will call ipfw(8) to create firewall rules, pipes and queues with unique numbers starting from 10000 (configurable via 'set global start...'). %rX, %pX, %qX, %tX macroses will be expanded within mpd-rule and mpd-queue. To the end of each rule will be added "via ngX" to make the rule apply only to that client's networking interface.
As a result of this example we would get these commands executed:
ipfw table 32 add 10.0.0.1
ipfw table 32 add 10.0.0.15
ipfw pipe 10000 config bw 10Kbyte/s
ipfw pipe 10001 config bw 20Kbyte/s
ipfw add 10000 pipe 10000 all from any to table\(32\) in via ng0
ipfw add 10001 pipe 10001 all from table\(32\) to any out via ng0
ipfw add 10002 allow all from any to any via ng0
When the link goes down, all created rules will be removed.
Note: As soon as mpd executes ipfw commands using shell, shell's special characters like "(" and ")" must be slashed.
internal (ng_bpf/ng_car)
Mpd can create complex per-interface traffic filtering/limiting engines inside netgraph when it is requested by mpd-filter and mpd-limit RADIUS attributes.
mpd-filter attribute is a packet filter declaration for using in mpd-limit. mpd-filter consists of two main parts: match/nomatch verdict and the condition. tcpdump (libpcap) expression syntax used for conditions.
mpd-filter: match|nomatch {condition}
mpd-limit attribute is an action which should be done for packet. It consists of two main parts: filter and action.
mpd-limit: {filter} {action}
Filter can be or "all" (any packet) or "fltX" (packets matching to specified mpd-filter).
filter: any|fltX
Action can be: "pass" (stop processing and pass packet), "deny" (stop processing and drop packet), "rate-limit" (do Cisco-like rate-limit), "shape" (do simple RED aware traffic shaping).
Actions "rate-limit" and "shape" can have optional "pass" suffix to stop processing after doing this action.
action: pass | deny | rate-limit {rate(bits/s)} [{normal burst(bytes)} [{extended burst(bytes)}]] [pass] | shape {rate(bits/s)} [{burst(bytes)}] [pass]
As example you can write in your RADIUS configuration something like:
mpd-filter += "1#1=nomatch src net 10.0.0.0/24",
mpd-filter += "1#2=match src net 10.0.0.0/10",
mpd-filter += "2#1=match dst net 10.0.0.0/16",
mpd-filter += "2#2=match dst net 11.0.0.0/8",
mpd-limit += "in#1=flt1 pass",
mpd-limit += "in#2=flt2 shape 64000 4000 pass",
mpd-limit += "in#3=all deny",
mpd-limit += "out#1=flt2 pass",
mpd-limit += "out#2=all rate-limit 1024000 150000 300000",
mpd-limit += "out#3=all pass",
As result, one ng_bpf node will be created to implement traffic filters and several (two for this example) ng_car nodes for traffic shaping and rate-limiting. Incoming traffic from 10.0.0.0/10 except 10.0.0.0/24 will be passed, traffic to 10.0.0.0/16 and 11.0.0.0/8 will be shaped to 64Kbits/s, all other will be denied. Outgoing traffic to 10.0.0.0/16 and 11.0.0.0/8 will be passed, all other will be limited to 1024Kbit/s.
каждый выбирает тот способ, с которым ему удобно работать
кто то вышеописанный, кто то отдельно
pf, кто то отдельно
ipfw и т.д. и т.п.